cern.ch - robtex.com
cern.ch
ch
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.ch ⭐ | ||||||
| NS | b.nic.ch | ||||||
| NS | d.nic.ch | ||||||
| NS | e.nic.ch | ||||||
| NS | f.nic.ch | ||||||
| SOA | a.nic.chdns-operation@switch.ch 2026-05-01 #47 | ||||||
rank #4 in the tld
This domain "cern.ch" refers to the official website of the European Organization for Nuclear Research, better known as CERN. Based in Switzerland, CERN is renowned for its cutting-edge research in particle physics, including the discovery of the Higgs boson particle. "CERN" stands for "Conseil Européen pour la Recherche Nucléaire," which translates to "European Council for Nuclear Research".WOT: SAFE (88/100)
📈 Tranco rank: #3,047
Subdomains
Same first word
Similar names
DNS History
9 records (6 active, 3 former)
●NSext-dns-1.cern.ch2015-09-01 → 2026-05-01 · 2 obs
● 2026-05-01 22:07:16
●NSext-dns-2.cern.ch2015-09-01 → 2026-05-01 · 2 obs
● 2026-05-01 22:07:16
●MXcern-ch.mail.protection.outlook.com2015-11-24 → 2026-05-01 · 3 obs
● 2015-11-24 12:08:30
● 2026-05-01 22:07:16
○MXcernmxgwlb4.cern.ch2015-09-01 → 2015-11-24 · 4 obs
● 2015-11-24 12:08:30
○ 2015-11-30 09:59:30
○ 2026-05-01 22:07:16
●A188.184.77.2502026-02-14 → 2026-05-01 · 3 obs
● 2026-02-14 17:29:02
● 2026-05-01 22:07:16
○A188.184.9.2342015-09-01 → 2021-08-16 · 4 obs
● 2021-08-16 21:50:20
○ 2026-02-14 17:29:02
○ 2026-05-01 22:07:16
○A2001:1458:201:70::100:262015-09-01 → 2021-08-16 · 4 obs
● 2021-08-16 21:50:20
○ 2026-02-14 17:29:02
○ 2026-05-01 22:07:16
●A2001:1458:d00:3c::100:2f92026-02-14 → 2026-05-01 · 3 obs
● 2026-02-14 17:29:02
● 2026-05-01 22:07:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ch | d.nic.ch, b.nic.ch, e.nic.ch, a.nic.ch... | - |
| cern.ch | scsnms.switch.ch, ext-dns-2.cern.ch, ext-dns-1.cern.ch | 6 records |
✅ Authoritative Response
Server:192.65.187.5
NS records: scsnms.switch.ch, ext-dns-2.cern.ch, ext-dns-1.cern.ch
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cern.ch (unsigned zone)
⏱️ Timing
Total: 398ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 188.184.77.250 |
| AAAA | 1 | 2001:1458:d00:3c::100:2f9 |
| NS | 3 | scsnms.switch.ch, ext-dns-1.cern.ch... |
| MX | 1 | cern-ch.mail.protection.outlook.com (pri |
| TXT | 8 | openai-domain-verification=dv-R5PuLWpZKT, google-site-verification=aoFc91q4kA9Xp_-... |
| SOA | 1 | ext-dns-1.cern.ch external-dns.cern.ch |
📌 Glue Records Collected
Total: 6
In-bailiwick: 4 (ext-dns-2.cern.ch, ext-dns-1.cern.ch, ext-dns-2.cern.ch...)
Out-of-bailiwick: 2 (scsnms.switch.ch, scsnms.switch.ch)
Analysis
Hierarchy
cern.ch is a parent of pb-d-128-141-44-175.cern.ch, twikiai04.cern.ch, wwwcompass.cern.ch, gitlab.cern.ch, pc-tbed-pub-06.cern.ch and hundreds of other host names.
IP Addresses
cern.ch points to two IP numbers: 2001:1458:d00:3c::100:2f9 and 188.184.77.250.
Other host names such as its.cern.ch, lbaas-73ae2b4e-5554-441e-b8e3-8d558b25f161.cern.ch and paas-apps-lb-tncrit.cern.ch share IP numbers with cern.ch.
Name Servers
The delegation for cern.ch is handled by three name servers: ext-dns-1.cern.ch, ext-dns-2.cern.ch and scsnms.switch.ch.
cern.ch at least partially shares name servers with other domains, for instance sitg.ch, 165.190.194.in-addr.arpa, heds.ch, 243.91.192.in-addr.arpa and 130.12.194.in-addr.arpa.
These name servers are commonly used together with the name servers ip-cahcp-1.cern.ch, ip-cahcp-2.cern.ch, ccpntc3.in2p3.fr, ccpnvx.in2p3.fr, ns01.geant.net, ns02.geant.net, ns03.geant.net, ns1.ja.net, grid01.geant.net and ns2.switch.ch.
Two IP numbers per host:
ext-dns-1.cern.ch points to 2001:1458:1:1::5 and 192.65.187.5.
ext-dns-2.cern.ch points to 2001:1458:1:2::100:85 and 192.91.245.85.
scsnms.switch.ch points to 2001:620:0:ff::a7 and 130.59.31.26.
Mail Servers
cern.ch is handled by a single mail server, cern-ch.mail.protection.outlook.com.
cern.ch uses the same mail server configuration as other domains, such as monalisa-origin.cern.ch, zenodo.org, mail.cern.ch, ippog.org and invenio-software.org.
cern-ch.mail.protection.outlook.com resolves to eight IP addresses: 2a01:111:f403:ca04::1, 2a01:111:f403:ca04::e, 2a01:111:f403:ca09::, 2a01:111:f403:ca09::4, 52.101.68.5, 52.101.68.10, 52.101.73.1 and 52.101.73.22.