alumni.cern - robtex.com
alumni.cern
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=1774326245 | ||||||
Same first word
Similar names
DNS History
7 records (4 active, 3 former)
●NSext-dns-1.cern.ch2016-12-13 → 2026-03-24 · 2 obs
● 2026-03-24 04:31:34
●NSext-dns-2.cern.ch2016-12-13 → 2026-03-24 · 2 obs
● 2026-03-24 04:31:34
●MXalumni-cern.mail.protection.outlook.com2017-07-14 → 2026-03-24 · 2 obs
● 2026-03-24 04:31:34
●A104.17.59.1852026-02-18 → 2026-03-24 · 3 obs
● 2026-02-18 14:11:30
● 2026-03-24 04:31:34
○A163.172.178.1192017-05-16 → 2018-08-25 · 5 obs
● 2017-05-16 07:09:06
● 2018-08-25 01:37:20
○ 2026-02-18 14:11:30
○ 2026-03-24 04:31:34
○A188.184.37.2052016-12-13 → 2016-12-30 · 4 obs
● 2016-12-30 07:49:02
○ 2017-07-14 08:41:32
○ 2026-03-24 04:31:34
○A2001:1458:201:b0::100:d2016-12-13 → 2016-12-30 · 4 obs
● 2016-12-30 07:49:02
○ 2017-05-16 07:09:06
○ 2026-03-24 04:31:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cern | a0.nic.cern, a2.nic.cern, b0.nic.cern, c0.nic.cern | 8 records |
| alumni.cern | ext-dns-1.cern.ch, ext-dns-2.cern.ch | - |
✅ Authoritative Response
Server:192.91.245.85
NS records: ext-dns-1.cern.ch, ext-dns-2.cern.ch
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for alumni.cern (unsigned zone)
⏱️ Timing
Total: 881ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 104.17.59.185 |
| NS | 2 | ext-dns-1.cern.ch, ext-dns-2.cern.ch |
| MX | 1 | alumni-cern.mail.protection.outlook.com |
| TXT | 2 | v=spf1 include:spf.cern.ch include:email, MS=ms31718397 |
| 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
alumni.cern points to a single IP address: 104.17.59.185.
Other host names such as portage.biz, princetonsocal.org, rares.fr, nonhosted.hivebrite.princeton.edu and aitpe.fr share IPs with alumni.cern.
Name Servers
Two name servers ext-dns-1.cern.ch and ext-dns-2.cern.ch handle the delegation for alumni.cern.
alumni.cern shares the same name server setup as other domains, for example cms.cern, about.cern, europeanstrategy.cern, twikiai.cern.ch and getindico.io.
alumni.cern at least partially shares name servers with other domains, for example 163.190.194.in-addr.arpa, ihep.su, isupportfordementia.net, cern.org and 155.16.192.in-addr.arpa.
these name servers are commonly used with the following name servers: scsnms.switch.ch, whqdns1.who.int, whqdns2.who.int, whqdns3.who.int, ccpntc3.in2p3.fr, ccpnvx.in2p3.fr, ip-cahcp-1.cern.ch, ip-cahcp-2.cern.ch, ns0.diamond.ac.uk and ns1.diamond.ac.uk.
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.
Mail Servers
The alumni-cern.mail.protection.outlook.com mail server handles alumni.cern.
alumni-cern.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:ca04::b, 2a01:111:f403:ca09::1, 2a01:111:f403:ca09::5, 2a01:111:f403:ca09::7, 52.101.68.3, 52.101.68.5, 52.101.73.11 and 52.101.73.153.