krf.dk is a .dk domain served by 2 nameservers (pedro.ns.cloudflare.com, roxy.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.34.154 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by krf-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.34.154 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.205.231 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:229a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:cde7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.34.154,172.67.205.231 ech=AEX+DQBBLwAgACASsBja1Q+peYm8ZImrV1PxFfsC2a62imn2qSHcTFwdeQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:229a,2606:4700:3033::ac43:cde7 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms21546401 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (krf.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | 104.21.34.154 172.67.205.231 2606:4700:3032::6815:229a 2606:4700:3033::ac43:cde7 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.krf.dk | LiH92LVNP58R0JZ7bwAOb3t7QM7rN8Ol7GTWw5-9Pn4 |
| TXT | _acme-challenge.krf.dk | lJ_VmadmdpO8Iat2Lcuur0ewxOIE5kpz4whFAe39jKc |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2412875355 |
| Primary NS (MNAME) | pedro.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-28 22:05:50 | 1676ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-22 13:19:15 | 2123ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-11 02:39:30 | 2787ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-27 15:02:13 | 1519ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-27 13:15:51 | 1851ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-23 05:21:04 shown | 2189ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-12 05:13:05 | 2010ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-25 14:58:00 | 3255ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-19 20:42:46 | 1974ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-01 08:59:57 | 1164ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-25 12:39:17 | 1302ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-24 12:08:04 | 1467ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-17 22:29:29 | 1701ms | 2 NS 2 A 1 MX | 🔒 Secure |