`root.cern`

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` ⭐
		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`
		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.ch`external-dns@cern.ch 2025-03-25 #1

`cern`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.nic.cern` ⭐
	NS	`a2.nic.cern`
	NS	`b0.nic.cern`
	NS	`c0.nic.cern`
	SOA	`a0.nic.cern`hostmaster@donuts.email serial=1776942750

rank #197363 globally
rank #3 in the tld
this domain is "root"📈 Tranco rank: #282,186

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Similar names

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toor.cn

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toor.me

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toro.construction

otro.me

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orto.de

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troo.org

orto.co

DNS History

9 records (4 active, 5 former)

●NSext-dns-1.cern.ch2017-05-29 → 2026-04-23 · 2 obs

● 2017-05-29 00:02:16
● 2026-04-23 11:23:12

●NSext-dns-2.cern.ch2017-05-29 → 2026-04-23 · 2 obs

● 2017-05-29 00:02:16
● 2026-04-23 11:23:12

○MXcernmxgwlb.cern.ch2017-05-29 → 2020-12-05 · 4 obs

● 2017-05-29 00:02:16
● 2020-12-05 06:58:14
○ 2026-03-02 02:04:54
○ 2026-04-23 11:23:12

○A137.138.13.1432017-05-29 → 2017-05-29 · 3 obs

● 2017-05-29 00:02:16
○ 2020-11-29 21:33:32
○ 2026-04-23 11:23:12

○A137.138.18.2362020-11-29 → 2020-12-05 · 5 obs

○ 2017-05-29 00:02:16
● 2020-11-29 21:33:32
● 2020-12-05 06:58:14
○ 2026-03-02 02:04:54
○ 2026-04-23 11:23:12

●A137.138.6.722026-03-02 → 2026-04-23 · 3 obs

○ 2020-12-05 06:58:14
● 2026-03-02 02:04:54
● 2026-04-23 11:23:12

○A2001:1458:201:45::100:b2017-05-29 → 2017-05-29 · 3 obs

● 2017-05-29 00:02:16
○ 2020-11-29 21:33:32
○ 2026-04-23 11:23:12

●A2001:1458:201:8b::100:23b2026-03-02 → 2026-04-23 · 3 obs

○ 2020-12-05 06:58:14
● 2026-03-02 02:04:54
● 2026-04-23 11:23:12

○A2001:1458:201:ee::100:62020-11-29 → 2020-12-05 · 5 obs

○ 2017-05-29 00:02:16
● 2020-11-29 21:33:32
● 2020-12-05 06:58:14
○ 2026-03-02 02:04:54
○ 2026-04-23 11:23:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cern	a0.nic.cern, a2.nic.cern, b0.nic.cern, c0.nic.cern	8 records
root.cern	ext-dns-1.cern.ch, ext-dns-2.cern.ch	-

✅ Authoritative Response

Server:192.65.187.5

NS records: ext-dns-1.cern.ch, ext-dns-2.cern.ch

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for root.cern (unsigned zone)

⏱️ Timing

Total: 1054ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`137.138.6.72`
AAAA	1	`2001:1458:201:8b::100:23b`
NS	2	`ext-dns-2.cern.ch, ext-dns-1.cern.ch`
SOA	1	`ext-dns-1.cern.ch external-dns.cern.ch`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a0.nic.cern, a2.nic.cern, b0.nic.cern...)

Analysis

IP Addresses

root.cern resolves to two IP numbers: 2001:1458:201:8b::100:23b and 137.138.6.72.

Other host names, for example webeos-apps-lb-1.cern.ch, www.nic.cern, nic.cern and lbaas-630cc22c-65d0-4b63-90ae-ea57b4b05b81.cern.ch share IP numbers with root.cern.

Name Servers

Two name servers ext-dns-1.cern.ch and ext-dns-2.cern.ch handle delegation for root.cern.

root.cern uses the same name server setup as other domains, for example isolde.cern, docs.cern.ch, paas-apps-shard-1.cern.ch, ippog.org and careers.cern.

root.cern partially shares name servers with other domains; examples include 68.70.192.in-addr.arpa, european-light-source.eu, cc.in2p3.fr, 156.16.192.in-addr.arpa and 99.48.193.in-addr.arpa.

These name servers are commonly used alongside 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 IP numbers:

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

root.cern - robtex.com

root.cern

cern