Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cern.ch
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 07:02:25 UTC · ↺ Refresh
MX Hostnames
- cern-ch.mail.protection.outlook.com
MX Priorities
- cern-ch.mail.protection.outlook.com: 10
A / AAAA Records
- 188.184.77.250 ↩ lbaas-73ae2b4e-5554-441e-b8e3-8d558b25f161.cern.ch
- 2001:1458:d00:3c::100:2f9 ↩ lbaas-73ae2b4e-5554-441e-b8e3-8d558b25f161.cern.ch
Mail Server IPs
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca09::6 ↩ mail-am4pr0401cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com
SOA Record
Raw SOA
ext-dns-1.cern.ch external-dns.cern.ch 2013752284 1200 300 2419200 900
Primary NS (mname)
ext-dns-1.cern.ch
Admin Email (rname)
external-dns@cern.ch
Serial
2013752284
Refresh
1200s
Retry
300s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
ext-dns-2.cern.ch
ext-dns-1.cern.ch
scsnms.switch.ch
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.cern.ch ?all
📊 DNS lookups: 1/10
? Neutral (?all) — no enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=none; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- cursor-domain-verification-8t0p9r=J6wFIABgbtZfHacKasG8HDZ1p
- google-site-verification=aoFc91q4kA9Xp_-Z_AFY1gI0AmXpTXIMcGseZfvH0J8
- goqTmP4CYqgXEPONka9g8FCGD4vpvjieG4RI5NLxYZsBh/y5p88K9ym3zIFcLVbaYQdJkdhfYcjADXGdGMdSCA==
- mistral-domain-verification=3a255465ec599b8016fb91a2f8563cc304e3b95d
- SPFv=spf1 include:spf.cern.ch ?all
- MS=ms44269116
- openai-domain-verification=dv-R5PuLWpZKT8QhVzrlbLDHvBz
- autodesk-domain-verification=5Lt81tqLuEgD4wCC73YQ
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