fagteori.dk is a .dk domain served by 2 nameservers (clark.ns.cloudflare.com, dorthy.ns.cloudflare.com). It was registered on 21 July 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 13.107.213.53 is hosted by Microsoft Corporation (AS8075) in United States. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 13.107.213.53 | 58s | — | AS8075 | Microsoft Corporation | 13.107.192.0/19 | 🇺🇸 United States | — |
| 13.107.246.53 | 58s | — | AS8075 | Microsoft Corporation | 13.107.240.0/21 | 🇺🇸 United States | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2620:1ec:46::53 | 60s | — | AS8075 | Microsoft Corporation | 2620:1ec:46:0:0:0:0:0/47 | 🇺🇸 United States | — |
| 2620:1ec:bdf::53 | 60s | — | AS8075 | Microsoft Corporation | 2620:1ec:b00:0:0:0:0:0/40 | 🇺🇸 United States | — |
| www CNAME | vm-iis-prod-aje9bxhng5fqcnbe.z01.azurefd.net (all on azurefd.net) |
| www vs bare domain | Same network fagteori.dk: 150.171.109.193 2603:1061:14:c1::1 (AS8075) www.fagteori.dk: 150.171.109.193 2603:1061:14:c0::1 (AS8075) |
| Wildcard | No |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2409906602 |
| Primary NS (MNAME) | clark.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2003-07-21 |
| Expires | 2027-07-31 (285d) |
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 |
|---|---|---|---|
| 2026-10-05 22:06:39 | 405ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-09-24 20:32:45 | 3535ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-09-20 13:44:36 | 840ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-09-17 05:45:49 | 1155ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-09-15 06:53:11 | 1516ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-08-26 16:45:48 | 875ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 01:31:15 shown | 9531ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-19 07:00:51 | 2827ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-07-14 21:38:43 | 831ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-23 17:30:57 | 2494ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-23 17:12:25 | 1155ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 09:11:46 | 953ms | 2 NS 1 A 0 MX | 🔓 Insecure |