n4.dk is a .dk domain served by 2 nameservers (riya.ns.cloudflare.com, syeef.ns.cloudflare.com). It was registered on 14 November 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.81.13 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.emailsrvr.com, mx2.emailsrvr.com. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.81.13 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.155.231 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.emailsrvr.com | 108.166.43.1 | mx1.emailsrvr.com | AS19994 Rackspace Hosting |
| 20 | 300s | mx2.emailsrvr.com | 146.20.161.2 | mx2.emailsrvr.com | AS27357 Rackspace Hosting |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.81.13 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::ac43:9be7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3031::6815:510d | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.81.13,172.67.155.231 ech=AEX+DQBBagAgACCLP10npn0ypKFsPWXDI8chfzQVkv7JjWV3CplztS/rcwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:9be7,2606:4700:3031::6815:510d |
| TXT Record |
|---|
| v=spf1 include:_spf.elasticemail.com include:emailsrvr.com ~all |
| Policy | Record (n4.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.elasticemail.com include:emailsrvr.com ~all |
| Policy | Record (_dmarc.n4.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 104.21.81.13 172.67.155.231 2606:4700:3030::ac43:9be7 2606:4700:3031::6815:510d (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: 3/10 · 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 | 2411513114 |
| Primary NS (MNAME) | riya.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 | 2015-11-14 |
| Expires | 2035-11-30 (3330d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 22:48:40 | 1017ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-09 11:12:14 | 1802ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-04 07:53:06 | 1782ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-09-28 03:05:41 | 917ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-09-27 08:08:26 | 1766ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-09-07 19:44:21 | 2220ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-27 15:27:37 | 2742ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-10 21:19:36 | 3095ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-08 07:11:35 shown | 1421ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-07-17 13:54:52 | 1815ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-07-09 03:30:43 | 2148ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-25 21:23:23 | 1027ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-24 21:00:41 | 971ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-20 04:46:58 | 839ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-18 00:25:23 | 2726ms | 2 NS 2 A 2 MX | 🔒 Secure |