underudvikling.dk is a .dk domain served by 3 nameservers (linux3.dform.dk, ns1.dform.dk, ns2.dform.dk). It was registered on 8 May 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.98.139.7 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mail.underudvikling.dk. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 91.98.139.7 | 3600s | linux3.dform.dk | AS24940 | Hetzner Online GmbH | 91.98.0.0/15 | 🇩🇪 Germany | Nuremberg |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 5 | 3600s | mail.underudvikling.dk | 2a01:4f8:1c1a:22c5::1 91.98.139.7 |
— linux3.dform.dk |
AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 91.98.139.7 |
| 🔶 Autoconfig | 91.98.139.7 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:4f8:1c1a:22c5::1 | 3600s | — | AS24940 | Hetzner Online GmbH | 2a01:4f8:0:0:0:0:0:0/31 | 🇩🇪 Germany | Nuremberg |
| TXT Record |
|---|
| v=spf1 a mx a:underudvikling.dk ip4:91.98.139.7 ip4:91.98.139.7 ip6:2a01:4f8:1c1a:22c5::1 ~all |
| Policy | Record (underudvikling.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a mx a:underudvikling.dk ip4:91.98.139.7 ip4:91.98.139.7 ip6:2a01:4f8:1c1a:22c5::1 ~all |
| Policy | Record (_dmarc.underudvikling.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; ruf=mailto:postmaster@underudvikling.dk; rua=mailto:postmaster@underudvikling.dk |
| Flags | Tag | Value |
|---|---|---|
| 0 | issuewild | letsencrypt.org |
| www | 91.98.139.7 2a01:4f8:1c1a:22c5::1 (AS24940) (address records, no CNAME) |
| www vs bare domain | Same network underudvikling.dk: 91.98.139.7 2a01:4f8:1c1a:22c5::1 (AS24940) www.underudvikling.dk: 91.98.139.7 2a01:4f8:1c1a:22c5::1 (AS24940) |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 3/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026062300 |
| Primary NS (MNAME) | linux3.dform.dk |
| Responsible (RNAME) | root@linux3.dform.dk |
| Refresh | 3600s |
| Retry | 600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-05-08 |
| Expires | 2027-05-31 (226d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-11 19:21:15 | 3612ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-20 14:04:59 | 2572ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-06 11:00:17 | 12632ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 19:42:43 | 2734ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 19:03:45 | 9870ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 10:23:07 | 10257ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-21 19:21:57 | 13911ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-18 07:52:42 | 13938ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-14 06:11:07 | 5531ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-06 17:52:06 | 6877ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-16 02:22:34 | 9841ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-29 02:00:28 shown | 1342ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 22:51:08 | 2325ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 20:18:31 | 1177ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 01:04:03 | 6412ms | 3 NS 1 A 1 MX | 🔓 Insecure |