postnr.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 23 September 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 37.27.17.130 is hosted by Hetzner Online GmbH (AS24940) in Finland. Mail is handled by localhost.chsc.dk. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 37.27.17.130 | 21600s | vps4.chsc.dk | AS24940 | Hetzner Online GmbH | 37.27.0.0/16 | 🇫🇮 Finland | Helsinki |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 21600s | localhost.chsc.dk | ::1 127.0.0.1 |
— — |
— — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:4f9:c012:4189::1 | 21600s | vps4.chsc.dk | AS24940 | Hetzner Online GmbH | 2a01:4f8:0:0:0:0:0:0/31 | 🇫🇮 Finland | Helsinki |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (postnr.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.postnr.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:caa-report@chsc.dk |
| 0 | issue | letsencrypt.org |
| www CNAME | postnr.dk (all on postnr.dk) |
| www vs bare domain | Same network postnr.dk: 37.27.17.130 2a01:4f9:c012:4189::1 (AS24940) www.postnr.dk: 37.27.17.130 2a01:4f9:c012:4189::1 (AS24940) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026052801 |
| 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 | Punktum dk A/S (direct) |
| Registered | 2010-09-23 |
| Expires | 2030-04-30 (1286d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 04:19:17 | 1102ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 03:06:50 | 563ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 05:57:11 | 663ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 03:39:15 | 1088ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-30 14:23:20 | 2156ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-03 17:44:13 | 8772ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-29 20:45:39 | 709ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 17:40:42 | 734ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 05:44:04 shown | 2591ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 13:00:10 | 769ms | 2 NS 1 A 1 MX | 🔒 Secure |