b4ch.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 89.23.254.56 is hosted by Fiberby ApS (AS42541) 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 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 |
|---|---|---|---|---|---|---|---|
| 89.23.254.56 | 3600s | 89-23-254-56.ip4.fiberby.net | AS42541 | Fiberby ApS | 89.23.224.0/19 | 🇩🇰 Denmark | Copenhagen |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 89.23.254.56 |
| 🔶 Autoconfig | 89.23.254.56 |
| www | 89.23.254.56 (AS42541) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2026063001 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 05:34:09 | 813ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-06 07:58:24 | 994ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 18:38:44 | 626ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 12:36:15 | 806ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-06 03:56:28 | 1098ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-19 05:55:56 shown | 4852ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-01 12:59:36 | 505ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-23 21:49:59 | 458ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-22 15:50:51 | 1066ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-16 13:57:36 | 442ms | 2 NS 1 A 0 MX | 🔒 Secure |