isbn-kontoret.dk is a .dk domain served by 2 nameservers (sec1.rcode0.net, sec2.rcode0.net). It was registered on 4 September 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.111.162.19 is hosted by Dbc Digital A/s (AS24853) in Denmark. 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 |
|---|---|---|---|---|---|---|---|
| 193.111.162.19 | 600s | misc-proxy.dbc.dk | AS24853 | Dbc Digital A/s | 193.111.162.0/24 | 🇩🇰 Denmark | — |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:domains@dbc.dk |
| 0 | issue | letsencrypt.org |
| www CNAME | misc-proxy.dbc.dk (all on dbc.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.isbn-kontoret.dk | _acme-challenge.isbn-kontoret.dk.acme.dbc.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2022033455 |
| Primary NS (MNAME) | ns.dbc.dk |
| Responsible (RNAME) | domains@dbc.dk |
| Refresh | 28800s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | DBC DIGITAL A/S |
| Registered | 1998-09-04 |
| Expires | 2027-09-30 (348d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 08:23:48 shown | 2208ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-11 07:30:14 | 807ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-09 06:14:36 | 1290ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 06:04:25 | 1931ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-04 02:48:25 | 539ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 02:43:09 | 613ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 02:36:28 | 570ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 01:44:51 | 528ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-29 07:39:42 | 685ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 06:42:09 | 642ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 06:23:33 | 663ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-21 04:14:34 | 928ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-14 02:54:23 | 914ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-07 00:30:23 | 701ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-03 14:07:29 | 768ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-01 09:36:43 | 1990ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-29 05:54:33 | 1462ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-26 21:35:35 | 870ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 17:24:56 | 839ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-24 14:56:27 | 9719ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-19 09:12:56 | 1652ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-18 09:11:15 | 879ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-16 06:13:36 | 691ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-10 21:43:06 | 2434ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-09 16:58:06 | 699ms | 2 NS 1 A 0 MX | 🔒 Secure |