gustavson.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 31 October 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.135 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod8-cph3.one.com, mx2.pub.mailpod8-cph3.one.com and 1 more. The zone is DNSSEC-signed but currently fails validation, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from this 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 |
|---|---|---|---|---|---|---|---|
| 77.111.240.135 | 600s | webcluster8.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.mailpod8-cph3.one.com | 185.164.14.102 | mx1.pub.mailpod8-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod8-cph3.one.com | 185.164.14.103 | mx2.pub.mailpod8-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod8-cph3.one.com | 185.164.14.104 | mx3.pub.mailpod8-cph3.one.com | AS51468 One.com A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:3d:a9af:4229:2cc3 | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 77.111.240.135 2a02:2350:5:102:3d:a9af:4229:2cc3 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network gustavson.dk: 77.111.240.135 2a02:2350:5:102:3d:a9af:4229:2cc3 (AS51468) www.gustavson.dk: 77.111.240.135 2a02:2350:5:102:3d:a9af:4229:2cc3 (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod8-cph3.one.com | DANE-EE · SPKI · SHA-256 | 026A3DCAF3804B72DA8C105B5ADC0C7D… |
| SMTP _25._tcp.mx2.pub.mailpod8-cph3.one.com | DANE-EE · SPKI · SHA-256 | 026A3DCAF3804B72DA8C105B5ADC0C7D… |
| SMTP _25._tcp.mx3.pub.mailpod8-cph3.one.com | DANE-EE · SPKI · SHA-256 | 026A3DCAF3804B72DA8C105B5ADC0C7D… |
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | broken trust chain resolving 'gustavson.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2026061905 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2009-10-31 |
| Expires | 2026-10-31 (13d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 04:58:39 | 527ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-01 00:14:49 | 694ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 15:27:29 | 830ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-25 15:02:47 | 634ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-28 20:14:35 | 678ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-20 00:51:26 | 5927ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-18 23:44:08 | 1143ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-29 11:29:39 | 845ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-14 14:10:52 | 951ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-10 05:14:39 | 4832ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-27 04:49:22 | 1275ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-23 15:35:51 | 979ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-22 14:20:28 shown | 735ms | 2 NS 1 A 3 MX | ⚠️ Bogus |
| 2026-06-20 21:23:15 | 1869ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-19 22:56:06 | 818ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 10:09:10 | 2198ms | 2 NS 1 A 3 MX | 🔒 Secure |