diff --git a/config/generic.json.sample b/config/generic.json.sample
index 4b5a440..6c6dc15 100644
--- a/config/generic.json.sample
+++ b/config/generic.json.sample
@@ -29,10 +29,10 @@
   "_notes": {
     "loglevel": "(lookyloo) Can be one of the value listed here: https://docs.python.org/3/library/logging.html#levels",
     "splash_loglevel": "(Splash) INFO is *very* verbose.",
+    "only_global_lookups": "Set it to True if your instance is publicly available so users aren't able to scan your internal network",
     "public_instance": "true means disabling features deemed unsafe on a public instance (such as indexing private captures)",
     "website_listen_ip": "IP Flask will listen on. Defaults to 0.0.0.0, meaning all interfaces.",
     "website_listen_port": "Port Flask will listen on.",
-    "only_global_lookups": "Set it to True if your instance is publicly available so users aren't able to scan your internal network",
     "splash_url": "URL to connect to splash",
     "default_user_agent": "Ultimate fallback if the capture form, or the asynchronous submission, don't provide a UA",
     "cache_clean_user": "Format: {username: password}",
diff --git a/lookyloo/lookyloo.py b/lookyloo/lookyloo.py
index a7735ab..1c1fe92 100644
--- a/lookyloo/lookyloo.py
+++ b/lookyloo/lookyloo.py
@@ -20,6 +20,9 @@ from urllib.parse import urlsplit
 from uuid import uuid4
 from zipfile import ZipFile
 
+import dns.resolver
+import dns.rdatatype
+
 import publicsuffix2  # type: ignore
 from defang import refang  # type: ignore
 from har2tree import CrawledTree, Har2TreeError, HarFile, HostNode, URLNode
@@ -583,6 +586,45 @@ class Lookyloo():
         with (capture_dir / 'tree.pickle').open('wb') as _p:
             pickle.dump(ct, _p)
 
+    def _build_cname_chain(self, known_cnames: Dict[str, Optional[str]], hostname) -> List[str]:
+        cnames: List[str] = []
+        to_search = hostname
+        while True:
+            if known_cnames.get(to_search) is None:
+                break
+            # At this point, known_cnames[to_search] must be a str
+            cnames.append(known_cnames[to_search])  # type: ignore
+            to_search = known_cnames[to_search]
+        return cnames
+
+    def search_cnames(self, ct: CrawledTree):
+        cnames_path = ct.root_hartree.har.path.parent / 'cnames.json'
+        host_cnames: Dict[str, Optional[str]] = {}
+        if cnames_path.exists():
+            with cnames_path.open() as f:
+                host_cnames = json.load(f)
+
+        for node in ct.root_hartree.hostname_tree.traverse():
+            if node.name not in host_cnames:
+                # Resolve and cache
+                try:
+                    response = dns.resolver.resolve(node.name, search=True)
+                    for answer in response.response.answer:
+                        if answer.rdtype == dns.rdatatype.RdataType.CNAME:
+                            host_cnames[str(answer.name).rstrip('.')] = str(answer[0].target).rstrip('.')
+                        else:
+                            host_cnames[str(answer.name).rstrip('.')] = None
+                except Exception:
+                    host_cnames[node.name] = None
+            cnames = self._build_cname_chain(host_cnames, node.name)
+            if cnames:
+                node.add_feature('cname', cnames)
+
+        with cnames_path.open('w') as f:
+            json.dump(host_cnames, f)
+
+        return ct
+
     def get_crawled_tree(self, capture_uuid: str) -> CrawledTree:
         capture_dir = self.lookup_capture_dir(capture_uuid)
         if not capture_dir:
@@ -617,6 +659,7 @@ class Lookyloo():
                 meta = json.load(f)
         ct = self.get_crawled_tree(capture_uuid)
         ct = self.context.contextualize_tree(ct)
+        ct = self.search_cnames(ct)
         return ct.to_json(), ct.start_time.isoformat(), ct.user_agent, ct.root_url, meta
 
     def remove_pickle(self, capture_uuid: str) -> None:
@@ -1120,6 +1163,14 @@ class Lookyloo():
         if not hostnode:
             raise MissingUUID(f'Unable to find UUID {node_uuid} in {capture_dir}')
 
+        cnames_path = ct.root_hartree.har.path.parent / 'cnames.json'
+        if cnames_path.exists():
+            with cnames_path.open() as f:
+                host_cnames = json.load(f)
+            cnames = self._build_cname_chain(host_cnames, hostnode.name)
+            if cnames:
+                hostnode.add_feature('cname', cnames)
+
         known_content = self.context.find_known_content(hostnode)
 
         urls: List[Dict[str, Any]] = []
diff --git a/poetry.lock b/poetry.lock
index 3a75757..e362682 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -198,7 +198,7 @@ description = "cryptography is a package which provides cryptographic recipes an
 name = "cryptography"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
-version = "3.1"
+version = "3.1.1"
 
 [package.dependencies]
 cffi = ">=1.8,<1.11.3 || >1.11.3"
@@ -235,6 +235,21 @@ optional = false
 python-versions = "*"
 version = "0.5.3"
 
+[[package]]
+category = "main"
+description = "DNS toolkit"
+name = "dnspython"
+optional = false
+python-versions = ">=3.6"
+version = "2.0.0"
+
+[package.extras]
+curio = ["curio (>=1.2)", "sniffio (>=1.1)"]
+dnssec = ["cryptography (>=2.6)"]
+doh = ["requests", "requests-toolbelt"]
+idna = ["idna (>=2.1)"]
+trio = ["trio (>=0.14.0)", "sniffio (>=1.1)"]
+
 [[package]]
 category = "main"
 description = "A Python Environment for (phylogenetic) Tree Exploration"
@@ -342,7 +357,7 @@ marker = "python_version < \"3.8\""
 name = "importlib-metadata"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.7.0"
+version = "2.0.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -1061,7 +1076,7 @@ description = "Yet another URL library"
 name = "yarl"
 optional = false
 python-versions = ">=3.5"
-version = "1.5.1"
+version = "1.6.0"
 
 [package.dependencies]
 idna = ">=2.0"
@@ -1078,11 +1093,11 @@ marker = "python_version < \"3.8\""
 name = "zipp"
 optional = false
 python-versions = ">=3.6"
-version = "3.1.0"
+version = "3.2.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["jaraco.itertools", "func-timeout"]
+testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [[package]]
 category = "main"
@@ -1101,7 +1116,7 @@ test = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 
 [metadata]
-content-hash = "37a5f8c605be09a7c1414c045bc6032a2a57017ce10daa61f05d260d8d6c9bc8"
+content-hash = "cab57adfd46e198a8245cb80703b679cb0e92dde251086ab648c3a524d8edff1"
 lock-version = "1.0"
 python-versions = "^3.7"
 
@@ -1253,28 +1268,28 @@ constantly = [
     {file = "constantly-15.1.0.tar.gz", hash = "sha256:586372eb92059873e29eba4f9dec8381541b4d3834660707faf8ba59146dfc35"},
 ]
 cryptography = [
-    {file = "cryptography-3.1-cp27-cp27m-macosx_10_10_x86_64.whl", hash = "sha256:969ae512a250f869c1738ca63be843488ff5cc031987d302c1f59c7dbe1b225f"},
-    {file = "cryptography-3.1-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:b45ab1c6ece7c471f01c56f5d19818ca797c34541f0b2351635a5c9fe09ac2e0"},
-    {file = "cryptography-3.1-cp27-cp27m-manylinux2010_x86_64.whl", hash = "sha256:247df238bc05c7d2e934a761243bfdc67db03f339948b1e2e80c75d41fc7cc36"},
-    {file = "cryptography-3.1-cp27-cp27m-win32.whl", hash = "sha256:10c9775a3f31610cf6b694d1fe598f2183441de81cedcf1814451ae53d71b13a"},
-    {file = "cryptography-3.1-cp27-cp27m-win_amd64.whl", hash = "sha256:9f734423eb9c2ea85000aa2476e0d7a58e021bc34f0a373ac52a5454cd52f791"},
-    {file = "cryptography-3.1-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:e7563eb7bc5c7e75a213281715155248cceba88b11cb4b22957ad45b85903761"},
-    {file = "cryptography-3.1-cp27-cp27mu-manylinux2010_x86_64.whl", hash = "sha256:94191501e4b4009642be21dde2a78bd3c2701a81ee57d3d3d02f1d99f8b64a9e"},
-    {file = "cryptography-3.1-cp35-abi3-macosx_10_10_x86_64.whl", hash = "sha256:dc3f437ca6353979aace181f1b790f0fc79e446235b14306241633ab7d61b8f8"},
-    {file = "cryptography-3.1-cp35-abi3-manylinux1_x86_64.whl", hash = "sha256:725875681afe50b41aee7fdd629cedbc4720bab350142b12c55c0a4d17c7416c"},
-    {file = "cryptography-3.1-cp35-abi3-manylinux2010_x86_64.whl", hash = "sha256:321761d55fb7cb256b771ee4ed78e69486a7336be9143b90c52be59d7657f50f"},
-    {file = "cryptography-3.1-cp35-abi3-manylinux2014_aarch64.whl", hash = "sha256:2a27615c965173c4c88f2961cf18115c08fedfb8bdc121347f26e8458dc6d237"},
-    {file = "cryptography-3.1-cp35-cp35m-win32.whl", hash = "sha256:e7dad66a9e5684a40f270bd4aee1906878193ae50a4831922e454a2a457f1716"},
-    {file = "cryptography-3.1-cp35-cp35m-win_amd64.whl", hash = "sha256:4005b38cd86fc51c955db40b0f0e52ff65340874495af72efabb1bb8ca881695"},
-    {file = "cryptography-3.1-cp36-abi3-win32.whl", hash = "sha256:cc6096c86ec0de26e2263c228fb25ee01c3ff1346d3cfc219d67d49f303585af"},
-    {file = "cryptography-3.1-cp36-abi3-win_amd64.whl", hash = "sha256:2e26223ac636ca216e855748e7d435a1bf846809ed12ed898179587d0cf74618"},
-    {file = "cryptography-3.1-cp36-cp36m-win32.whl", hash = "sha256:7a63e97355f3cd77c94bd98c59cb85fe0efd76ea7ef904c9b0316b5bbfde6ed1"},
-    {file = "cryptography-3.1-cp36-cp36m-win_amd64.whl", hash = "sha256:4b9e96543d0784acebb70991ebc2dbd99aa287f6217546bb993df22dd361d41c"},
-    {file = "cryptography-3.1-cp37-cp37m-win32.whl", hash = "sha256:eb80a288e3cfc08f679f95da72d2ef90cb74f6d8a8ba69d2f215c5e110b2ca32"},
-    {file = "cryptography-3.1-cp37-cp37m-win_amd64.whl", hash = "sha256:180c9f855a8ea280e72a5d61cf05681b230c2dce804c48e9b2983f491ecc44ed"},
-    {file = "cryptography-3.1-cp38-cp38-win32.whl", hash = "sha256:fa7fbcc40e2210aca26c7ac8a39467eae444d90a2c346cbcffd9133a166bcc67"},
-    {file = "cryptography-3.1-cp38-cp38-win_amd64.whl", hash = "sha256:548b0818e88792318dc137d8b1ec82a0ab0af96c7f0603a00bb94f896fbf5e10"},
-    {file = "cryptography-3.1.tar.gz", hash = "sha256:26409a473cc6278e4c90f782cd5968ebad04d3911ed1c402fc86908c17633e08"},
+    {file = "cryptography-3.1.1-cp27-cp27m-macosx_10_10_x86_64.whl", hash = "sha256:65beb15e7f9c16e15934569d29fb4def74ea1469d8781f6b3507ab896d6d8719"},
+    {file = "cryptography-3.1.1-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:983c0c3de4cb9fcba68fd3f45ed846eb86a2a8b8d8bc5bb18364c4d00b3c61fe"},
+    {file = "cryptography-3.1.1-cp27-cp27m-manylinux2010_x86_64.whl", hash = "sha256:e97a3b627e3cb63c415a16245d6cef2139cca18bb1183d1b9375a1c14e83f3b3"},
+    {file = "cryptography-3.1.1-cp27-cp27m-win32.whl", hash = "sha256:cb179acdd4ae1e4a5a160d80b87841b3d0e0be84af46c7bb2cd7ece57a39c4ba"},
+    {file = "cryptography-3.1.1-cp27-cp27m-win_amd64.whl", hash = "sha256:b372026ebf32fe2523159f27d9f0e9f485092e43b00a5adacf732192a70ba118"},
+    {file = "cryptography-3.1.1-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:680da076cad81cdf5ffcac50c477b6790be81768d30f9da9e01960c4b18a66db"},
+    {file = "cryptography-3.1.1-cp27-cp27mu-manylinux2010_x86_64.whl", hash = "sha256:5d52c72449bb02dd45a773a203196e6d4fae34e158769c896012401f33064396"},
+    {file = "cryptography-3.1.1-cp35-abi3-macosx_10_10_x86_64.whl", hash = "sha256:f0e099fc4cc697450c3dd4031791559692dd941a95254cb9aeded66a7aa8b9bc"},
+    {file = "cryptography-3.1.1-cp35-abi3-manylinux1_x86_64.whl", hash = "sha256:a7597ffc67987b37b12e09c029bd1dc43965f75d328076ae85721b84046e9ca7"},
+    {file = "cryptography-3.1.1-cp35-abi3-manylinux2010_x86_64.whl", hash = "sha256:4549b137d8cbe3c2eadfa56c0c858b78acbeff956bd461e40000b2164d9167c6"},
+    {file = "cryptography-3.1.1-cp35-abi3-manylinux2014_aarch64.whl", hash = "sha256:89aceb31cd5f9fc2449fe8cf3810797ca52b65f1489002d58fe190bfb265c536"},
+    {file = "cryptography-3.1.1-cp35-cp35m-win32.whl", hash = "sha256:559d622aef2a2dff98a892eef321433ba5bc55b2485220a8ca289c1ecc2bd54f"},
+    {file = "cryptography-3.1.1-cp35-cp35m-win_amd64.whl", hash = "sha256:451cdf60be4dafb6a3b78802006a020e6cd709c22d240f94f7a0696240a17154"},
+    {file = "cryptography-3.1.1-cp36-abi3-win32.whl", hash = "sha256:762bc5a0df03c51ee3f09c621e1cee64e3a079a2b5020de82f1613873d79ee70"},
+    {file = "cryptography-3.1.1-cp36-abi3-win_amd64.whl", hash = "sha256:b12e715c10a13ca1bd27fbceed9adc8c5ff640f8e1f7ea76416352de703523c8"},
+    {file = "cryptography-3.1.1-cp36-cp36m-win32.whl", hash = "sha256:21b47c59fcb1c36f1113f3709d37935368e34815ea1d7073862e92f810dc7499"},
+    {file = "cryptography-3.1.1-cp36-cp36m-win_amd64.whl", hash = "sha256:48ee615a779ffa749d7d50c291761dc921d93d7cf203dca2db663b4f193f0e49"},
+    {file = "cryptography-3.1.1-cp37-cp37m-win32.whl", hash = "sha256:b2bded09c578d19e08bd2c5bb8fed7f103e089752c9cf7ca7ca7de522326e921"},
+    {file = "cryptography-3.1.1-cp37-cp37m-win_amd64.whl", hash = "sha256:f99317a0fa2e49917689b8cf977510addcfaaab769b3f899b9c481bbd76730c2"},
+    {file = "cryptography-3.1.1-cp38-cp38-win32.whl", hash = "sha256:ab010e461bb6b444eaf7f8c813bb716be2d78ab786103f9608ffd37a4bd7d490"},
+    {file = "cryptography-3.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:99d4984aabd4c7182050bca76176ce2dbc9fa9748afe583a7865c12954d714ba"},
+    {file = "cryptography-3.1.1.tar.gz", hash = "sha256:9d9fc6a16357965d282dd4ab6531013935425d0dc4950df2e0cf2a1b1ac1017d"},
 ]
 cssselect = [
     {file = "cssselect-1.1.0-py2.py3-none-any.whl", hash = "sha256:f612ee47b749c877ebae5bb77035d8f4202c6ad0f0fc1271b3c18ad6c4468ecf"},
@@ -1287,6 +1302,10 @@ decorator = [
 defang = [
     {file = "defang-0.5.3.tar.gz", hash = "sha256:86aeff658d7cd4c3b61d16089872e1c1f0a1b7b3c64d4ca9525c017caeb284d7"},
 ]
+dnspython = [
+    {file = "dnspython-2.0.0-py3-none-any.whl", hash = "sha256:40bb3c24b9d4ec12500f0124288a65df232a3aa749bb0c39734b782873a2544d"},
+    {file = "dnspython-2.0.0.zip", hash = "sha256:044af09374469c3a39eeea1a146e8cac27daec951f1f1f157b1962fc7cb9d1b7"},
+]
 ete3 = [
     {file = "ete3-3.1.2.tar.gz", hash = "sha256:4fc987b8c529889d6608fab1101f1455cb5cbd42722788de6aea9c7d0a8e59e9"},
 ]
@@ -1319,8 +1338,8 @@ idna = [
     {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
 ]
 importlib-metadata = [
-    {file = "importlib_metadata-1.7.0-py2.py3-none-any.whl", hash = "sha256:dc15b2969b4ce36305c51eebe62d418ac7791e9a157911d58bfb1f9ccd8e2070"},
-    {file = "importlib_metadata-1.7.0.tar.gz", hash = "sha256:90bb658cdbbf6d1735b6341ce708fc7024a3e14e99ffdc5783edea9f9b077f83"},
+    {file = "importlib_metadata-2.0.0-py2.py3-none-any.whl", hash = "sha256:cefa1a2f919b866c5beb7c9f7b0ebb4061f30a8a9bf16d609b000e2dfaceb9c3"},
+    {file = "importlib_metadata-2.0.0.tar.gz", hash = "sha256:77a540690e24b0305878c37ffd421785a6f7e53c8b5720d211b211de8d0e95da"},
 ]
 incremental = [
     {file = "incremental-17.5.0-py2.py3-none-any.whl", hash = "sha256:717e12246dddf231a349175f48d74d93e2897244939173b01974ab6661406b9f"},
@@ -1360,25 +1379,21 @@ lxml = [
     {file = "lxml-4.5.2-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:bea760a63ce9bba566c23f726d72b3c0250e2fa2569909e2d83cda1534c79443"},
     {file = "lxml-4.5.2-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:c3f511a3c58676147c277eff0224c061dd5a6a8e1373572ac817ac6324f1b1e0"},
     {file = "lxml-4.5.2-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:59daa84aef650b11bccd18f99f64bfe44b9f14a08a28259959d33676554065a1"},
-    {file = "lxml-4.5.2-cp35-cp35m-manylinux2014_aarch64.whl", hash = "sha256:c9d317efde4bafbc1561509bfa8a23c5cab66c44d49ab5b63ff690f5159b2304"},
     {file = "lxml-4.5.2-cp35-cp35m-win32.whl", hash = "sha256:9dc9006dcc47e00a8a6a029eb035c8f696ad38e40a27d073a003d7d1443f5d88"},
     {file = "lxml-4.5.2-cp35-cp35m-win_amd64.whl", hash = "sha256:08fc93257dcfe9542c0a6883a25ba4971d78297f63d7a5a26ffa34861ca78730"},
     {file = "lxml-4.5.2-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:121b665b04083a1e85ff1f5243d4a93aa1aaba281bc12ea334d5a187278ceaf1"},
     {file = "lxml-4.5.2-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:5591c4164755778e29e69b86e425880f852464a21c7bb53c7ea453bbe2633bbe"},
     {file = "lxml-4.5.2-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:cc411ad324a4486b142c41d9b2b6a722c534096963688d879ea6fa8a35028258"},
-    {file = "lxml-4.5.2-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:1fa21263c3aba2b76fd7c45713d4428dbcc7644d73dcf0650e9d344e433741b3"},
     {file = "lxml-4.5.2-cp36-cp36m-win32.whl", hash = "sha256:786aad2aa20de3dbff21aab86b2fb6a7be68064cbbc0219bde414d3a30aa47ae"},
     {file = "lxml-4.5.2-cp36-cp36m-win_amd64.whl", hash = "sha256:e1cacf4796b20865789083252186ce9dc6cc59eca0c2e79cca332bdff24ac481"},
     {file = "lxml-4.5.2-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:80a38b188d20c0524fe8959c8ce770a8fdf0e617c6912d23fc97c68301bb9aba"},
     {file = "lxml-4.5.2-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:ecc930ae559ea8a43377e8b60ca6f8d61ac532fc57efb915d899de4a67928efd"},
     {file = "lxml-4.5.2-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:a76979f728dd845655026ab991df25d26379a1a8fc1e9e68e25c7eda43004bed"},
-    {file = "lxml-4.5.2-cp37-cp37m-manylinux2014_aarch64.whl", hash = "sha256:cfd7c5dd3c35c19cec59c63df9571c67c6d6e5c92e0fe63517920e97f61106d1"},
     {file = "lxml-4.5.2-cp37-cp37m-win32.whl", hash = "sha256:5a9c8d11aa2c8f8b6043d845927a51eb9102eb558e3f936df494e96393f5fd3e"},
     {file = "lxml-4.5.2-cp37-cp37m-win_amd64.whl", hash = "sha256:4b4a111bcf4b9c948e020fd207f915c24a6de3f1adc7682a2d92660eb4e84f1a"},
     {file = "lxml-4.5.2-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:5dd20538a60c4cc9a077d3b715bb42307239fcd25ef1ca7286775f95e9e9a46d"},
     {file = "lxml-4.5.2-cp38-cp38-manylinux1_i686.whl", hash = "sha256:2b30aa2bcff8e958cd85d907d5109820b01ac511eae5b460803430a7404e34d7"},
     {file = "lxml-4.5.2-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:aa8eba3db3d8761db161003e2d0586608092e217151d7458206e243be5a43843"},
-    {file = "lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:8f0ec6b9b3832e0bd1d57af41f9238ea7709bbd7271f639024f2fc9d3bb01293"},
     {file = "lxml-4.5.2-cp38-cp38-win32.whl", hash = "sha256:107781b213cf7201ec3806555657ccda67b1fccc4261fb889ef7fc56976db81f"},
     {file = "lxml-4.5.2-cp38-cp38-win_amd64.whl", hash = "sha256:f161af26f596131b63b236372e4ce40f3167c1b5b5d459b29d2514bd8c9dc9ee"},
     {file = "lxml-4.5.2.tar.gz", hash = "sha256:cdc13a1682b2a6241080745b1953719e7fe0850b40a5c71ca574f090a1391df6"},
@@ -1411,11 +1426,6 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win32.whl", hash = "sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win_amd64.whl", hash = "sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_i686.whl", hash = "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-win32.whl", hash = "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 more-itertools = [
@@ -1730,27 +1740,27 @@ werkzeug = [
     {file = "Werkzeug-1.0.1.tar.gz", hash = "sha256:6c80b1e5ad3665290ea39320b91e1be1e0d5f60652b964a3070216de83d2e47c"},
 ]
 yarl = [
-    {file = "yarl-1.5.1-cp35-cp35m-macosx_10_14_x86_64.whl", hash = "sha256:db6db0f45d2c63ddb1a9d18d1b9b22f308e52c83638c26b422d520a815c4b3fb"},
-    {file = "yarl-1.5.1-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:17668ec6722b1b7a3a05cc0167659f6c95b436d25a36c2d52db0eca7d3f72593"},
-    {file = "yarl-1.5.1-cp35-cp35m-win32.whl", hash = "sha256:040b237f58ff7d800e6e0fd89c8439b841f777dd99b4a9cca04d6935564b9409"},
-    {file = "yarl-1.5.1-cp35-cp35m-win_amd64.whl", hash = "sha256:f18d68f2be6bf0e89f1521af2b1bb46e66ab0018faafa81d70f358153170a317"},
-    {file = "yarl-1.5.1-cp36-cp36m-macosx_10_14_x86_64.whl", hash = "sha256:c52ce2883dc193824989a9b97a76ca86ecd1fa7955b14f87bf367a61b6232511"},
-    {file = "yarl-1.5.1-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:ce584af5de8830d8701b8979b18fcf450cef9a382b1a3c8ef189bedc408faf1e"},
-    {file = "yarl-1.5.1-cp36-cp36m-win32.whl", hash = "sha256:df89642981b94e7db5596818499c4b2219028f2a528c9c37cc1de45bf2fd3a3f"},
-    {file = "yarl-1.5.1-cp36-cp36m-win_amd64.whl", hash = "sha256:3a584b28086bc93c888a6c2aa5c92ed1ae20932f078c46509a66dce9ea5533f2"},
-    {file = "yarl-1.5.1-cp37-cp37m-macosx_10_14_x86_64.whl", hash = "sha256:da456eeec17fa8aa4594d9a9f27c0b1060b6a75f2419fe0c00609587b2695f4a"},
-    {file = "yarl-1.5.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:bc2f976c0e918659f723401c4f834deb8a8e7798a71be4382e024bcc3f7e23a8"},
-    {file = "yarl-1.5.1-cp37-cp37m-win32.whl", hash = "sha256:4439be27e4eee76c7632c2427ca5e73703151b22cae23e64adb243a9c2f565d8"},
-    {file = "yarl-1.5.1-cp37-cp37m-win_amd64.whl", hash = "sha256:48e918b05850fffb070a496d2b5f97fc31d15d94ca33d3d08a4f86e26d4e7c5d"},
-    {file = "yarl-1.5.1-cp38-cp38-macosx_10_14_x86_64.whl", hash = "sha256:9b930776c0ae0c691776f4d2891ebc5362af86f152dd0da463a6614074cb1b02"},
-    {file = "yarl-1.5.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:b3b9ad80f8b68519cc3372a6ca85ae02cc5a8807723ac366b53c0f089db19e4a"},
-    {file = "yarl-1.5.1-cp38-cp38-win32.whl", hash = "sha256:f379b7f83f23fe12823085cd6b906edc49df969eb99757f58ff382349a3303c6"},
-    {file = "yarl-1.5.1-cp38-cp38-win_amd64.whl", hash = "sha256:9102b59e8337f9874638fcfc9ac3734a0cfadb100e47d55c20d0dc6087fb4692"},
-    {file = "yarl-1.5.1.tar.gz", hash = "sha256:c22c75b5f394f3d47105045ea551e08a3e804dc7e01b37800ca35b58f856c3d6"},
+    {file = "yarl-1.6.0-cp35-cp35m-macosx_10_14_x86_64.whl", hash = "sha256:db9eb8307219d7e09b33bcb43287222ef35cbcf1586ba9472b0a4b833666ada1"},
+    {file = "yarl-1.6.0-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:e31fef4e7b68184545c3d68baec7074532e077bd1906b040ecfba659737df188"},
+    {file = "yarl-1.6.0-cp35-cp35m-win32.whl", hash = "sha256:5d84cc36981eb5a8533be79d6c43454c8e6a39ee3118ceaadbd3c029ab2ee580"},
+    {file = "yarl-1.6.0-cp35-cp35m-win_amd64.whl", hash = "sha256:5e447e7f3780f44f890360ea973418025e8c0cdcd7d6a1b221d952600fd945dc"},
+    {file = "yarl-1.6.0-cp36-cp36m-macosx_10_14_x86_64.whl", hash = "sha256:6f6898429ec3c4cfbef12907047136fd7b9e81a6ee9f105b45505e633427330a"},
+    {file = "yarl-1.6.0-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:d088ea9319e49273f25b1c96a3763bf19a882cff774d1792ae6fba34bd40550a"},
+    {file = "yarl-1.6.0-cp36-cp36m-win32.whl", hash = "sha256:b7c199d2cbaf892ba0f91ed36d12ff41ecd0dde46cbf64ff4bfe997a3ebc925e"},
+    {file = "yarl-1.6.0-cp36-cp36m-win_amd64.whl", hash = "sha256:67c5ea0970da882eaf9efcf65b66792557c526f8e55f752194eff8ec722c75c2"},
+    {file = "yarl-1.6.0-cp37-cp37m-macosx_10_14_x86_64.whl", hash = "sha256:04a54f126a0732af75e5edc9addeaa2113e2ca7c6fce8974a63549a70a25e50e"},
+    {file = "yarl-1.6.0-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:fcbe419805c9b20db9a51d33b942feddbf6e7fb468cb20686fd7089d4164c12a"},
+    {file = "yarl-1.6.0-cp37-cp37m-win32.whl", hash = "sha256:c604998ab8115db802cc55cb1b91619b2831a6128a62ca7eea577fc8ea4d3131"},
+    {file = "yarl-1.6.0-cp37-cp37m-win_amd64.whl", hash = "sha256:c22607421f49c0cb6ff3ed593a49b6a99c6ffdeaaa6c944cdda83c2393c8864d"},
+    {file = "yarl-1.6.0-cp38-cp38-macosx_10_14_x86_64.whl", hash = "sha256:7ce35944e8e61927a8f4eb78f5bc5d1e6da6d40eadd77e3f79d4e9399e263921"},
+    {file = "yarl-1.6.0-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:c15d71a640fb1f8e98a1423f9c64d7f1f6a3a168f803042eaf3a5b5022fde0c1"},
+    {file = "yarl-1.6.0-cp38-cp38-win32.whl", hash = "sha256:3cc860d72ed989f3b1f3abbd6ecf38e412de722fb38b8f1b1a086315cf0d69c5"},
+    {file = "yarl-1.6.0-cp38-cp38-win_amd64.whl", hash = "sha256:e32f0fb443afcfe7f01f95172b66f279938fbc6bdaebe294b0ff6747fb6db020"},
+    {file = "yarl-1.6.0.tar.gz", hash = "sha256:61d3ea3c175fe45f1498af868879c6ffeb989d4143ac542163c45538ba5ec21b"},
 ]
 zipp = [
-    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
-    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
+    {file = "zipp-3.2.0-py3-none-any.whl", hash = "sha256:43f4fa8d8bb313e65d8323a3952ef8756bf40f9a5c3ea7334be23ee4ec8278b6"},
+    {file = "zipp-3.2.0.tar.gz", hash = "sha256:b52f22895f4cfce194bc8172f3819ee8de7540aa6d873535a8668b730b8b411f"},
 ]
 "zope.interface" = [
     {file = "zope.interface-5.1.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:645a7092b77fdbc3f68d3cc98f9d3e71510e419f54019d6e282328c0dd140dcd"},
diff --git a/pyproject.toml b/pyproject.toml
index 89cb083..d096dc5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,6 +47,7 @@ scrapysplashwrapper = "^1.2.4"
 pysanejs = "^1.1"
 har2tree = "^1.2.4"
 pylookyloo = "^1.2"
+dnspython = "^2.0.0"
 
 [tool.poetry.dev-dependencies]
 mypy = "^0.782"
diff --git a/website/web/__init__.py b/website/web/__init__.py
index a6f6467..8412cd3 100644
--- a/website/web/__init__.py
+++ b/website/web/__init__.py
@@ -201,7 +201,7 @@ def hostnode_popup(tree_uuid: str, node_uuid: str):
     return render_template('hostname_popup.html',
                            tree_uuid=tree_uuid,
                            hostnode_uuid=node_uuid,
-                           hostname=hostnode.name,
+                           hostnode=hostnode,
                            urls=urls,
                            keys_response=keys_response,
                            keys_request=keys_request,
diff --git a/website/web/templates/hostname_popup.html b/website/web/templates/hostname_popup.html
index cd7a910..c971c92 100644
--- a/website/web/templates/hostname_popup.html
+++ b/website/web/templates/hostname_popup.html
@@ -9,7 +9,7 @@
 {% from "macros.html" import get_ressource_button %}
 {% from "macros.html" import context_form %}
 
-{% block title %}Details for {{ hostname }} {% endblock %}
+{% block title %}Details for {{ hostnode.name }} {% endblock %}
 
 {% block styles %}
 {{ super() }}
@@ -62,10 +62,20 @@
 {% block content %}
   {# Headers #}
   <center>
-      <h3>{{ hostname }}</h3>
+      <h3>{{ hostnode.name }}</h3>
     <button type="button" class="btn btn-info" onclick="whereAmI('{{ hostnode_uuid }}')">Locate in tree</button>
     <a href="{{ url_for('hostnode_details_text', tree_uuid=tree_uuid, node_uuid=hostnode_uuid) }}" class="btn btn-info" role="button">Download URLs as text</a>
   </center>
+  <div>
+  {% if hostnode.cname %}
+    <h4>CNAMEs:</h3>
+    <ul>
+    {% for cname in hostnode.cname %}
+      <li>{{ cname }}</li>
+    {% endfor %}
+    </ul>
+  {% endif %}
+  </div>
   {# Start list of URLs #}
   <ul class="list-group-flush">
     {% for url in urls %}