skl.dk is a .dk domain served by 2 nameservers (alina.ns.cloudflare.com, lewis.ns.cloudflare.com). It was registered on 21 July 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.31.140 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.zoho.com, mx2.zoho.com and 1 more. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.31.140 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.177.21 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:1f8c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:b115 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.31.140,172.67.177.21 ech=AEX+DQBBYAAgACCJZ1leMVMbmCc0pzdNvjnuMru7KJiQ0WD9PVIOy9PnMgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:1f8c,2606:4700:3037::ac43:b115 |
| TXT Record |
|---|
| v=spf1 include:zoho.com include:_spf.google.com ~all |
| zoho-verification=zb14376403.zmverify.zoho.com |
| Policy | Record (skl.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:zoho.com include:_spf.google.com ~all |
| www | Exists, no address |
| www vs bare domain | www does not resolve skl.dk: 104.21.31.140 172.67.177.21 2606:4700:3032::6815:1f8c 2606:4700:3037::ac43:b115 (AS13335) (all like this)www.skl.dk: no address |
| 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: 6/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2416075850 |
| Primary NS (MNAME) | alina.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 | 2015-07-21 |
| Expires | 2036-07-31 (3567d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 17:30:20 | 1462ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-16 09:56:49 | 1604ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-14 08:28:15 | 2703ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-09 03:19:53 shown | 1031ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-03 18:14:21 | 752ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-29 09:20:47 | 909ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-27 08:00:09 | 4761ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-23 14:39:05 | 1460ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-16 13:49:07 | 1130ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-07 11:10:32 | 1381ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-26 23:50:38 | 602ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-25 17:20:12 | 1221ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-22 12:21:53 | 2760ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-18 10:18:21 | 9300ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-06 21:57:41 | 2548ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-26 10:13:00 | 1201ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-23 09:03:33 | 9001ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-14 17:33:00 | 993ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-11 13:57:52 | 1189ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-20 20:14:42 | 905ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-18 04:01:44 | 1064ms | 2 NS 2 A 3 MX | 🔒 Secure |