teori-prøve.dk is a .dk domain served by 2 nameservers (fonzie.ns.cloudflare.com, linda.ns.cloudflare.com). It was registered on 6 November 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.19.145 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed but currently fails validation, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.19.145 | 600s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.186.126 | 600s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:1391 | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:ba7e | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.19.145,172.67.186.126 ech=AEX+DQBBuQAgACAvm/0aBCPA8lL0W8BJGlY+aQG5mSltXPg28U+pnur1XwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:1391,2606:4700:3037::ac43:ba7e |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (teori-prøve.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.teori-prøve.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; |
| www | 104.21.19.145 172.67.186.126 2606:4700:3032::6815:1391 2606:4700:3037::ac43:ba7e (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network teori-prøve.dk: 104.21.19.145 172.67.186.126 2606:4700:3032::6815:1391 2606:4700:3037::ac43:ba7e (AS13335) www.teori-prøve.dk: 104.21.19.145 172.67.186.126 2606:4700:3032::6815:1391 2606:4700:3037::ac43:ba7e (AS13335) |
| 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: 0/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxdomain |
| Field | Value |
|---|---|
| Serial | 2406169019 |
| Primary NS (MNAME) | fonzie.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 | 2023-11-06 |
| Expires | 2031-11-05 (1834d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 17:22:17 | 984ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-08 04:14:37 | 878ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-04 08:28:30 | 491ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-26 06:56:52 | 1092ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-23 14:20:11 | 757ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-18 00:29:45 | 964ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-23 20:37:37 | 10491ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-19 15:31:14 | 908ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-02 16:03:19 | 2691ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-02 15:08:43 | 5668ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-24 16:52:18 shown | 977ms | 2 NS 2 A 0 MX | ⚠️ Bogus |
| 2026-06-24 04:33:03 | 3632ms | 2 NS 2 A 0 MX | ⚠️ Bogus |
| 2026-06-23 11:21:15 | 420ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 14:15:40 | 942ms | 2 NS 2 A 0 MX | ⚠️ Bogus |
| 2026-06-19 22:00:52 | 5254ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-17 23:58:48 | 735ms | 2 NS 2 A 0 MX | 🔒 Secure |