root.cern.ch - robtex.com
root.cern.ch
| CNAME | webeos-apps-lb-1.cern.ch | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1458:201:8b::100:23b🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research | ||||||
| PTR | lbaas-630cc22c-65d0-4b63-90ae-ea57b4b05b81.cern.ch | ||||||
| A | 137.138.6.72🇨🇭 CERN137.138.0.0/16 -LAN1 | ||||||
| NS | ext-dns-1.cern.ch ⭐ ⚠️ Not in parent delegation | ||||||
| A | 2001:1458:1:1::5🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research | ||||||
| PTR | ext-dns-1.cern.ch | ||||||
| A | 192.65.187.5🇨🇭 CERN192.65.184.0/21 -BLK2 | ||||||
| PTR | ext-dns-1.cern.ch | ||||||
| NS | ext-dns-2.cern.ch ⚠️ Not in parent delegation | ||||||
| A | 2001:1458:1:2::100:85🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research | ||||||
| PTR | ext-dns-2.cern.ch | ||||||
| A | 192.91.245.85🇨🇭 CERN192.91.244.0/23 - European Laboratory for Particle Physics CH-1211 Geneva 23, Switzerland | ||||||
| PTR | ext-dns-2.cern.ch | ||||||
| SOA | ext-dns-1.cern.chexternal-dns@cern.ch serial=3 | ||||||
cern.ch
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1458:d00:3c::100:2f9🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research | ||||||
| A | 188.184.77.250🇨🇭 CERN188.184.0.0/16 -GPN2 | ||||||
| NS | ext-dns-1.cern.ch ⭐ | ||||||
| NS | ext-dns-2.cern.ch | ||||||
| NS | scsnms.switch.ch ⚠️ Not in parent delegation | ||||||
| MX | cern-ch.mail.protection.outlook.com ⭐ | ||||||
| TXT | google-site-verification=aoFc91q4kA9Xp_-Z_AFY1gI0AmXpTXIMcGseZfvH0J8 | ||||||
| TXT | v=spf1 include:spf.cern.ch ?all | ||||||
| TXT | goqTmP4CYqgXEPONka9g8FCGD4vpvjieG4RI5NLxYZsBh/y5p88K9ym3zIFcLVbaYQdJkdhfYcjAD... | ||||||
| TXT | autodesk-domain-verification=5Lt81tqLuEgD4wCC73YQ | ||||||
| TXT | MS=ms44269116 | ||||||
| TXT | openai-domain-verification=dv-R5PuLWpZKT8QhVzrlbLDHvBz | ||||||
| TXT | cursor-domain-verification-8t0p9r=J6wFIABgbtZfHacKasG8HDZ1p | ||||||
| TXT | mistral-domain-verification=3a255465ec599b8016fb91a2f8563cc304e3b95d | ||||||
| SOA | ext-dns-1.cern.chexternal-dns@cern.ch serial=2013757683 | ||||||
rank #1163 globally
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: #3,035
Same first word
Similar names
DNS History
11 records (1 active, 10 former)
○MXcern-ch.mail.protection.outlook.com2015-12-12 → 2015-12-12 · 4 obs
● 2015-12-12 20:09:48
○ 2016-04-04 23:46:34
○ 2026-04-24 13:33:22
○MXcernmxgwlb4.cern.ch2015-09-15 → 2015-10-06 · 5 obs
● 2015-09-15 02:17:00
● 2015-10-06 18:28:02
○ 2015-12-12 20:09:48
○ 2026-04-24 13:33:22
○A128.142.141.372008-11-29 → 2008-11-29 · 3 obs
○ 2015-07-24 23:48:14
○ 2026-04-24 13:33:22
○A128.142.164.822015-09-15 → 2015-12-12 · 5 obs
● 2015-09-15 02:17:00
● 2015-12-12 20:09:48
○ 2016-04-04 23:46:34
○ 2026-04-24 13:33:22
○A128.142.172.962015-07-24 → 2015-07-24 · 4 obs
● 2015-07-24 23:48:14
○ 2015-09-15 02:17:00
○ 2026-04-24 13:33:22
○A137.138.13.1432016-04-04 → 2017-03-18 · 5 obs
● 2016-04-04 23:46:34
● 2017-03-18 10:10:14
○ 2017-06-02 08:19:54
○ 2026-04-24 13:33:22
○A2001:1458:201:45::100:b2016-04-04 → 2017-03-18 · 5 obs
● 2016-04-04 23:46:34
● 2017-03-18 10:10:14
○ 2017-06-02 08:19:54
○ 2026-04-24 13:33:22
○CNAMElxbuild091.cern.ch2008-11-29 → 2008-11-29 · 3 obs
○ 2015-07-24 23:48:14
○ 2026-04-24 13:33:22
○CNAMElxroot02.cern.ch2015-07-24 → 2015-12-12 · 5 obs
● 2015-07-24 23:48:14
● 2015-12-12 20:09:48
○ 2016-04-04 23:46:34
○ 2026-04-24 13:33:22
○CNAMEp05153026283679.cern.ch2016-04-04 → 2017-06-02 · 5 obs
● 2016-04-04 23:46:34
● 2017-06-02 08:19:54
○ 2026-02-28 12:18:56
○ 2026-04-24 13:33:22
●CNAMEwebeos-apps-lb-1.cern.ch2026-02-28 → 2026-04-24 · 3 obs
● 2026-02-28 12:18:56
● 2026-04-24 13:33:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ch | b.nic.ch, a.nic.ch, e.nic.ch, d.nic.ch... | - |
| cern.ch | scsnms.switch.ch, ext-dns-1.cern.ch, ext-dns-2.cern.ch | 6 records |
✅ Authoritative Response
Server:192.91.245.85
NS records: scsnms.switch.ch, ext-dns-1.cern.ch, ext-dns-2.cern.ch
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cern.ch (unsigned zone)
⏱️ Timing
Total: 522ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | webeos-apps-lb-1.cern.ch |
📌 Glue Records Collected
Total: 6
In-bailiwick: 4 (ext-dns-1.cern.ch, ext-dns-2.cern.ch, ext-dns-1.cern.ch...)
Out-of-bailiwick: 2 (scsnms.switch.ch, scsnms.switch.ch)
Analysis
IP Addresses
root.cern.ch points to two IPs: 2001:1458:201:8b::100:23b and 137.138.6.72.
Other host names, for instance webeos-apps-lb-1.cern.ch, www.nic.cern, root.cern, nic.cern and lbaas-630cc22c-65d0-4b63-90ae-ea57b4b05b81.cern.ch share IP numbers with root.cern.ch.
Name Servers
Two name servers ext-dns-1.cern.ch and ext-dns-2.cern.ch are delegated to root.cern.ch.
root.cern.ch uses the same name server configuration as other domains, such as neighbours.cern, inveniosoftware.org, hse.cern, db-lb-162.cern.ch and indico-lb.cern.ch.
root.cern.ch at least partially shares name servers with other domains such as 145.12.194.in-addr.arpa, 194.16.192.in-addr.arpa, 111.48.193.in-addr.arpa, 220.48.193.in-addr.arpa and iomc.info.
These name servers are often used together with scsnms.switch.ch, ip-cahcp-1.cern.ch, ip-cahcp-2.cern.ch, ccpntc3.in2p3.fr, ccpnvx.in2p3.fr, ns0.diamond.ac.uk, ns1.diamond.ac.uk, whqdns1.who.int, whqdns2.who.int and whqdns3.who.int.
Host names with two IPs:
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.