seo-underviser.dk is a .dk domain served by 2 nameservers (josh.ns.cloudflare.com, lisa.ns.cloudflare.com). It was registered on 4 September 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.78.110 is hosted by Cloudflare, Inc. (AS13335). 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 |
|---|---|---|---|---|---|---|---|
| 104.21.78.110 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.220.99 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 194.126.234.120 |
| 🔶 Autoconfig | 194.126.234.120 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::6815:4e6e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:dc63 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.78.110,172.67.220.99 ech=AEX+DQBBBQAgACAVvFUir2xCVyFobLH4P241M8L25DJ3bDcN+t56ZbtYKAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:4e6e,2606:4700:3035::ac43:dc63 |
| www | 104.21.78.110 172.67.220.99 2606:4700:3034::6815:4e6e 2606:4700:3035::ac43:dc63 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network seo-underviser.dk: 104.21.78.110 172.67.220.99 2606:4700:3034::6815:4e6e 2606:4700:3035::ac43:dc63 (AS13335) www.seo-underviser.dk: 104.21.78.110 172.67.220.99 2606:4700:3034::6815:4e6e 2606:4700:3035::ac43:dc63 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2411568980 |
| Primary NS (MNAME) | josh.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 | 2011-09-04 |
| Expires | 2029-09-30 (1074d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 07:28:54 | 1412ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-11 06:18:33 | 1976ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-10 04:59:55 | 1540ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-06 18:21:27 | 1271ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-05 15:58:04 | 1816ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-29 15:30:49 shown | 1572ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-15 18:20:22 | 9443ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 21:41:05 | 733ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-08 17:58:26 | 1188ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 03:55:04 | 19609ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 03:49:17 | 23260ms | 2 NS 2 A 0 MX | 🔓 Insecure |