nbcuk.com

Valid Email Server
Domain Lookup › nbcuk.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
nbcuk.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-25 06:15:27 UTC · ↺ Refresh

MX Hostnames

  • nbcuk-com.mail.protection.outlook.com

MX Priorities

  • nbcuk-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 185.151.30.136 ↩ 185-151-30-136.ptr4.stackcp.net
  • 2a07:7800::136 (no PTR)

Mail Server IPs

  • 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
  • 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
  • 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
  • 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::2 ↩ mail-du2pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::9 ↩ mail-as8pr04cu00801.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.stackdns.com hostmaster.stackdns.com 1702980973 1800 900 1209600 300
Primary NS (mname)
ns1.stackdns.com
Admin Email (rname)
hostmaster@stackdns.com
Serial
1702980973
Refresh
1800s
Retry
900s
Expire
1209600s
Minimum TTL
300s

Nameservers (NS)

ns1.stackdns.com
ns2.stackdns.com
ns3.stackdns.com
ns4.stackdns.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.stackmail.com include:authsmtp.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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

3 records
  • as=1566465339
  • SPFv=spf1 include:spf.protection.outlook.com include:spf.stackmail.com include:authsmtp.com -all
  • google-site-verification=fH9II6tgGxMh1pQk1TYD-ipX6ApPYYWbZjgW03SqPGg
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