os.uk

Valid Email Server
Domain Lookup › os.uk

Domain Overview

DNS: ✓ 8h ago Checker: ✓ 8h ago
os.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-07-02 10:41:23 UTC · ↺ Refresh

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MX Hostnames

  • ordnancesurvey.mail.protection.outlook.com

MX Priorities

  • ordnancesurvey.mail.protection.outlook.com: 10

A / AAAA Records

  • 62.255.172.80 ↩ host-62-255-172.80.not-set-yet.virginmedia.net

Mail Server IPs

  • 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
  • 52.101.68.25 ↩ mail-db8pr02cu00101.inbound.protection.outlook.com
  • 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
  • 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::e ↩ mail-am7pr05cu00206.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::b ↩ mail-dbbpr03cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com

SOA Record

Raw SOA infoblox-prk-grid01.ipam.cw.net auto-dns.cw.net 2021030693 10800 3600 2419200 3600
Primary NS (mname)
infoblox-prk-grid01.ipam.cw.net
Admin Email (rname)
auto-dns@cw.net
Serial
2021030693
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
3600s

Nameservers (NS)

ans2.cw.net
ans1.cw.net

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:sharepointonline.com include:inc.emailr.com include:amazonses.com ip4:62.255.172.64/26 ip4:81.17.56.1 ip4:208.185.235.0/24 ip4:185.18.136.0/22 ip4:185.33.209.112 ip4:185.33.209.108 mx -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected];ruf=mailto:[email protected];fo=1:d:s;sp=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

14 records
  • _hpri5sgn9jg5uh43s4of8g6juizrvxv
  • dell-technologies-domain-verification=os.uk_ee6263ba-d907-4354-a522-0ed8e191b9c7_1765030793
  • MS=ms11343920
  • 44164ba3ca874de38f5e006c3093df8e
  • prodpad-domain-verification=u0revVPMmlzJAEzdGhJ1a27Dx1xz7bqW30/7HqH1aFw=
  • apple-domain-verification=cI0EFjMtJGgveDzm
  • Validity_Domain_Verification=kdi2lc9KD$kc8_NHGEOCzidl2938.tbex
  • h1-domain-verification=7X4mNncugNP15nF4drAqiyo8S97nh5SETEYc8s5yfnT2UEHc
  • 02bdc16a-4960-4fbc-9919-b7f2cc933835
  • fb9d7ec9-f432-4859-a7aa-c61253c7a036
  • _8x2ih1eck605433ph0dt5auu3khdith
  • SPFv=spf1 include:spf.protection.outlook.com include:sharepointonline.com include:inc.emailr.com include:amazonses.com ip4:62.255.172.64/26 ip4:81.17.56.1 ip4:208.185.235.0/24 ip4:185.18.136.0/22 ip4:185.33.209.112 ip4:185.33.209.108 mx -all
  • 4HsSzWr2pvvEn9PKcSLdJ92+L7oACjN/81zP2oA44ih4kmpGXKLpmk7R1tytImlYZQO87hBoitlVE4CjEY+ojA==
  • _085n8m14ktu6jxviy7m96tvdmfaklir
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