centralbibliotek.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 20 November 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 131.165.151.71 is hosted by KMD A/S (AS6834) in Denmark. Mail is handled by mail.fynbib.dk. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 131.165.151.71 | 600s | — | AS6834 | KMD A/S | 131.165.0.0/16 | 🇩🇰 Denmark | Roskilde |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | mail.fynbib.dk | 131.165.151.1 | mail.fynbib.dk | AS6834 KMD A/S |
| TXT Record |
|---|
| google-site-verification=JnNtoSvwqZYTrc2vEAQtBIYK-mD0t1Aeic8x5xnF_2g |
| v=spf1 include:fynbib.dk -all |
| Policy | Record (centralbibliotek.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:fynbib.dk -all |
| Policy | Record (_dmarc.centralbibliotek.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | centralbibliotek.dk (all on centralbibliotek.dk) → 131.165.151.71 (AS6834) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.centralbibliotek.dk | _acme-cbib.fynbib.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026091001 |
| 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 | 2001-11-20 |
| Expires | 2026-12-31 (69d) |
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 |
|---|---|---|---|
| 2026-10-12 01:34:22 | 1574ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-07 21:40:12 shown | 459ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-11 20:16:37 | 715ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 01:02:18 | 559ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-11 03:32:00 | 761ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-17 23:56:47 | 592ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-13 19:03:25 | 16607ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-01 23:56:39 | 1565ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:06:21 | 581ms | 2 NS 1 A 1 MX | 🔒 Secure |