bibstudieservice.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 4 April 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.207.2.154 is hosted by Herning Kommune (AS49010) in Denmark. Mail is handled by .. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 91.207.2.154 | 3600s | — | AS49010 | Herning Kommune | 91.207.2.0/23 | 🇩🇰 Denmark | Herning |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| www | 91.207.2.154 (AS49010) (address records, no CNAME) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092901 |
| 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 | 2023-04-04 |
| Expires | 2027-04-03 (167d) |
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 |
|---|---|---|---|
| 2026-09-30 02:23:06 shown | 601ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 00:42:03 | 415ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-11 01:28:55 | 608ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 00:29:32 | 4407ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-31 12:16:26 | 417ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 11:03:09 | 2445ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-17 15:09:19 | 4567ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-08 21:33:44 | 16761ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-06 23:32:22 | 923ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 22:18:13 | 482ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 11:00:17 | 1105ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-21 05:10:44 | 1004ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 14:28:28 | 665ms | 2 NS 1 A 4 MX | 🔒 Secure |