sentry.docs.cern.ch - dns.ninja

sentry.docs.cern.ch

CNAMEwebeos-apps-shard-1.cern.ch
DNSSEC⚠️ Not signed
A2001:1458:d00:17::100:9e🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research
PTRrouter-apps-shard-1-avz-b-r5qd4.cern.ch
A2001:1458:d00:2c::100:32c🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research
A2001:1458:d00:39::100:130🇨🇭 CERN2001:1458::/32 European Organization for Nuclear Research
A137.138.55.232🇨🇭 CERN137.138.0.0/16 -LAN1
A188.184.96.45🇨🇭 CERN188.184.0.0/16 -GPN2
A188.184.111.229🇨🇭 CERN188.184.0.0/16 -GPN2
NSext-dns-1.cern.ch ⭐ ⚠️ Not in parent delegation
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 ⚠️ Not in parent delegation
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 serial=1106

docs.cern.ch

DNSSEC⚠️ Not signed
NSext-dns-1.cern.ch ⭐ ⚠️ Not in parent delegation
NSext-dns-2.cern.ch ⚠️ Not in parent delegation
SOAext-dns-1.cern.chexternal-dns@cern.ch serial=4247
WOT: SAFE (66/100)
WOT: SAFE (82/100)

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DNS History

1 record (1 active, 0 former)

CNAMEwebeos-apps-shard-1.cern.ch
●CNAMEwebeos-apps-shard-1.cern.ch2026-07-12 → 2026-08-04 · 2 obs
● 2026-07-12 08:49:24
● 2026-08-04 12:48:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cha.nic.ch, e.nic.ch, d.nic.ch, b.nic.ch...-
cern.chext-dns-2.cern.ch, scsnms.switch.ch, ext-dns-1.cern.ch6 records

✅ Authoritative Response

Server:192.91.245.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cern.ch (unsigned zone)

⏱️ Timing

Total: 506ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1webeos-apps-shard-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

sentry.docs.cern.ch has 6 IP addresses — 137.138.55.232, 188.184.96.45, 188.184.111.229 and 3 more.

Further host names like webeos-apps-shard-1.cern.ch and router-apps-shard-1-avz-b-r5qd4.cern.ch overlap in IP numbers with sentry.docs.cern.ch.

Name Servers

DNS delegation for sentry.docs.cern.ch points to two name servers: ext-dns-1.cern.ch and ext-dns-2.cern.ch.

sentry.docs.cern.ch uses the same name servers as several other domains — among them cm(0x736578)tproxy.cern.ch, beams.cern, chis.cern and two more.

There is at least partial name server overlap between sentry.docs.cern.ch and other domains — 185.65.192.in-addr.arpa, wigner.mta.hu, 195.65.192.in-addr.arpa and two more among them.

These name servers regularly appear alongside scsnms.switch.ch, ip-cahcp-1.cern.ch, ip-cahcp-2.cern.ch and 7 other name servers in NS record sets.

ext-dns-1.cern.ch directs to 192.65.187.5 and 2001:1458:1:1::5. ext-dns-2.cern.ch directs to 192.91.245.85 and 2001:1458:1:2::100:85. Each host name carries two IP addresses.