nb1.co.uk

Valid Email Server
Domain Lookup › nb1.co.uk

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
nb1.co.uk
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-14 08:19:41 UTC · ↺ Refresh

MX Hostnames

  • mx-dub.tibus.net
  • mx-bh.tibus.net
  • mx-lon.tibus.net

MX Priorities

  • mx-lon.tibus.net: 15
  • mx-dub.tibus.net: 10
  • mx-bh.tibus.net: 30

A / AAAA Records

  • 198.185.159.144 (no PTR)
  • 198.185.159.145 (no PTR)
  • 198.49.23.144 (no PTR)
  • 198.49.23.145 (no PTR)

Mail Server IPs

  • 89.185.136.230 ↩ mx-lon.tibus.net
  • 89.185.129.99 ↩ mx-dub.tibus.net
  • 212.108.93.30 ↩ mx-bh.tibus.net

SOA Record

Raw SOA dns1.tibus.net hostmaster.tibus.net 2025070904 28800 7200 604800 86400
Primary NS (mname)
dns1.tibus.net
Admin Email (rname)
hostmaster@tibus.net
Serial
2025070904
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s

Nameservers (NS)

dns1.tibus.net
dns2.tibus.net

SPF Record

✓ Strict (-all)
v=spf1 include:spf1.tibus.net -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

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

2 records
  • DMARCv=DMARC1; p=none;
  • SPFv=spf1 include:spf1.tibus.net -all
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