engineering.cern - dns.ninja

engineering.cern

DNSSEC⚠️ Not signed
A2001:1458:201:8b::100:1c8🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research
PTRlbaas-ed6043ec-be11-40f8-b8b7-ec7cedb5fdd9.cern.ch
A137.138.6.31🇨🇭 CERN137.138.0.0/16 -LAN1
NSext-dns-1.cern.ch
A2001:1458:1:1::5🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research
PTRext-dns-1.cern.ch
A192.65.187.5🇨🇭 CERN192.65.184.0/21 -BLK2
PTRext-dns-1.cern.ch
NSext-dns-2.cern.ch
A2001:1458:1:2::100:85🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research
PTRext-dns-2.cern.ch
A192.91.245.85🇨🇭 CERN192.91.244.0/23 - European Laboratory for Particle Physics CH-1211 Geneva 23, Switzerland
PTRext-dns-2.cern.ch
SOAext-dns-1.cern.chexternal-dns@cern.ch 2019-05-20 #2

cern

DNSSEC🔒 Signed (DS record present)
NSa0.nic.cern
NSa2.nic.cern
NSb0.nic.cern
NSc0.nic.cern
SOAa0.nic.cernhostmaster@donuts.email serial=1784849649

Same first word

Similar names

DNS History

4 records (4 active, 0 former)

NSext-dns-1.cern.chext-dns-2.cern.chA137.138.6.312001:1458:201:8b::100:1c8
NSext-dns-1.cern.ch2026-04-29 → 2026-07-23 · 2 obs
● 2026-04-29 22:31:16
● 2026-07-23 23:40:46
NSext-dns-2.cern.ch2026-04-29 → 2026-07-23 · 2 obs
● 2026-04-29 22:31:16
● 2026-07-23 23:40:46
A137.138.6.312026-04-29 → 2026-07-23 · 2 obs
● 2026-04-29 22:31:16
● 2026-07-23 23:40:46
A2001:1458:201:8b::100:1c82026-04-29 → 2026-07-23 · 2 obs
● 2026-04-29 22:31:16
● 2026-07-23 23:40:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cernb0.nic.cern, a0.nic.cern, c0.nic.cern, a2.nic.cern8 records
engineering.cernext-dns-2.cern.ch, ext-dns-1.cern.ch-

✅ Authoritative Response

Server:192.65.187.5

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for engineering.cern (unsigned zone)

⏱️ Timing

Total: 732ms | Queries: -

📄 Records

TypeCountSample Data
A1137.138.6.31
AAAA12001:1458:201:8b::100:1c8
NS2ext-dns-2.cern.ch, ext-dns-1.cern.ch
SOA1ext-dns-1.cern.ch external-dns.cern.ch

📌 Glue Records Collected

Total: 8

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

Analysis

IP Addresses

engineering.cern resolves to the IP addresses 137.138.6.31 and 2001:1458:201:8b::100:1c8

Additional host names — antimatter.cern, particles.cern, technology.cern and two others — share IP numbers with engineering.cern.

Name Servers

engineering.cern uses two name servers for its delegation: ext-dns-1.cern.ch and ext-dns-2.cern.ch.

engineering.cern shares its name server setup with other domains, including accelerators.cern, www.cern, beamlineforschools.cern and two others.

engineering.cern shares at least some of its name servers with other domains, including 165.190.194.in-addr.arpa, 243.91.192.in-addr.arpa, 130.12.194.in-addr.arpa and two others.

These name servers are frequently seen alongside scsnms.switch.ch, ip-cahcp-1.cern.ch, ip-cahcp-2.cern.ch and 7 other name servers.

The two host names ext-dns-1.cern.ch and ext-dns-2.cern.ch each have a pair of IP addresses: ext-dns-1.cern.ch has 192.65.187.5 and 2001:1458:1:1::5, and ext-dns-2.cern.ch has 192.91.245.85 and 2001:1458:1:2::100:85.