sef-fiber.dk is a .dk domain served by 2 nameservers (dom.ns.cloudflare.com, isabel.ns.cloudflare.com). It was registered on 30 May 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by seffiber-dk0i.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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.
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.136 |
| TXT Record |
|---|
| MS=ms79744402 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (sef-fiber.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves sef-fiber.dk: no address www.sef-fiber.dk: no address |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.sef-fiber.dk | d21d0ThKeQigCxQ7gJTWKOaw_F-nz0X89dJqH7ErJiU |
| TXT | _acme-challenge.sef-fiber.dk | xTQqawjQIqm5dgkAxQuaBSSZBU9ku62b-7VkmzgVAa0 |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2417485685 |
| Primary NS (MNAME) | dom.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Eurodns S.A |
| Registered | 2022-05-30 |
| Expires | 2027-05-29 (220d) |
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).
Showing 100 of 116.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 06:55:07 shown | 2453ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-10-13 03:40:31 | 3084ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-10-12 01:25:20 | 2151ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-25 02:41:17 | 1115ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-23 13:09:45 | 1605ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-01 17:01:07 | 1210ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-26 03:54:55 | 912ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-14 20:48:10 | 1676ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-07-24 20:45:16 | 2301ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-23 15:13:22 | 1093ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-22 22:55:13 | 1146ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 17:14:55 | 1068ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 00:11:44 | 920ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-17 13:17:31 | 1101ms | 2 NS 0 A 1 MX | 🔓 Insecure |