repository.cern - robtex.com
repository.cern
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1458:201:8b::100:1c8🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research | ||||||
| PTR | lbaas-ed6043ec-be11-40f8-b8b7-ec7cedb5fdd9.cern.ch | ||||||
| A | 137.138.6.31🇨🇭 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.chexternal-dns@cern.ch 2014-05-15 #3 | ||||||
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.cernhostmaster@donuts.email serial=1774198225 | ||||||
Same first word
DNS History
4 records (4 active, 0 former)
●NSext-dns-1.cern.ch2026-03-08 → 2026-03-22 · 2 obs
● 2026-03-22 16:52:18
●NSext-dns-2.cern.ch2026-03-08 → 2026-03-22 · 2 obs
● 2026-03-22 16:52:18
●A137.138.6.312026-03-08 → 2026-03-22 · 2 obs
● 2026-03-22 16:52:18
●A2001:1458:201:8b::100:1c82026-03-08 → 2026-03-22 · 2 obs
● 2026-03-22 16:52:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cern | a0.nic.cern, a2.nic.cern, b0.nic.cern, c0.nic.cern | 8 records |
| repository.cern | ext-dns-2.cern.ch, ext-dns-1.cern.ch | - |
✅ Authoritative Response
Server: 192.91.245.85
NS records: ext-dns-2.cern.ch, ext-dns-1.cern.ch
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for repository.cern (unsigned zone)
⏱️ Timing
Total: 694ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 137.138.6.31 |
| AAAA | 1 | 2001:1458:201:8b::100:1c8 |
| 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, a0.nic.cern, a2.nic.cern...)
Analysis
IP Addresses
repository.cern points to two IP numbers: 2001:1458:201:8b::100:1c8 and 137.138.6.31.
Other host names, for instance science.cern, press.cern, cern.eu, learn.cern and environment.cern share IP numbers with repository.cern.
Name Servers
repository.cern is delegated to two name servers: ext-dns-1.cern.ch and ext-dns-2.cern.ch.
repository.cern uses the same name server setup as other domains, for instance careers.cern, invenio-software.org, quantum.cern, cds-lb.cern.ch and compass.cern.
repository.cern shares name servers with other domains at least partially, for instance 142.128.in-addr.arpa, 158.134.in-addr.arpa, 96.48.193.in-addr.arpa, 161.190.194.in-addr.arpa and embl.fr.
these name servers are commonly used with the name servers scsnms.switch.ch, ccpntc3.in2p3.fr, ccpnvx.in2p3.fr, ns0.diamond.ac.uk, ns1.diamond.ac.uk, whqdns1.who.int, whqdns2.who.int, whqdns3.who.int, ip-cahcp-1.cern.ch and ip-cahcp-2.cern.ch.
Host names with two IP numbers:
The host ext-dns-1.cern.ch points to 2001:1458:1:1::5 and 192.65.187.5.
The host ext-dns-2.cern.ch points to 2001:1458:1:2::100:85 and 192.91.245.85.