t3b.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.147 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod10-cph3.one.com, mx2.pub.mailpod10-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 77.111.240.147 | 3600s | webcluster20.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod10-cph3.one.com | 104.37.34.70 | mx1.pub.mailpod10-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod10-cph3.one.com | 104.37.34.71 | mx2.pub.mailpod10-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod10-cph3.one.com | 104.37.34.72 | mx3.pub.mailpod10-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod10-cph3.one.com | 104.37.34.73 | mx4.pub.mailpod10-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 77.111.240.147 |
| 🔶 Autoconfig | 77.111.240.147 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:9b:2c25:5d76:e61f | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 77.111.240.147 2a02:2350:5:102:9b:2c25:5d76:e61f (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network t3b.dk: 77.111.240.147 2a02:2350:5:102:9b:2c25:5d76:e61f (AS51468) www.t3b.dk: 77.111.240.147 2a02:2350:5:102:9b:2c25:5d76:e61f (AS51468) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod10-cph3.one.com | DANE-EE · SPKI · SHA-256 | 6F2F6668E559087AD0C5D55F223128E2… |
| SMTP _25._tcp.mx2.pub.mailpod10-cph3.one.com | DANE-EE · SPKI · SHA-256 | 6F2F6668E559087AD0C5D55F223128E2… |
| SMTP _25._tcp.mx3.pub.mailpod10-cph3.one.com | DANE-EE · SPKI · SHA-256 | 6F2F6668E559087AD0C5D55F223128E2… |
| SMTP _25._tcp.mx4.pub.mailpod10-cph3.one.com | DANE-EE · SPKI · SHA-256 | 6F2F6668E559087AD0C5D55F223128E2… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092802 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 01:20:55 shown | 489ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-30 00:35:58 | 683ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-29 09:21:26 | 762ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 08:36:02 | 2511ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 00:44:54 | 953ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-09 12:53:40 | 10522ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-02 22:09:48 | 721ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-04 04:40:52 | 951ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-29 13:25:27 | 894ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-08 15:02:27 | 6964ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-27 00:14:15 | 785ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 05:09:41 | 687ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 11:35:59 | 1179ms | 2 NS 1 A 4 MX | 🔒 Secure |