thdsen.dk is a .dk domain served by 2 nameservers (apollo.ns.cloudflare.com, novalee.ns.cloudflare.com). It was registered on 17 August 2026 (WHOIS) and first appeared in the .dk zone on 18 August 2026. Its website address 104.21.49.110 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by thdsen-dk.c-v1.mx.microsoft. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest 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 |
|---|---|---|---|---|---|---|---|
| 104.21.49.110 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.162.2 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.136 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:316e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:a202 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.49.110,172.67.162.2 ech=AEX+DQBBvQAgACCxHbzMEiwrKnDlt/rfqt7J98khnzl/iGurVJu8dCnFRAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:316e,2606:4700:3035::ac43:a202 |
| TXT Record |
|---|
| MS=ms31434220 |
| v=spf1 include:_spf.thdsen.dk -all |
| Policy | Record (thdsen.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.thdsen.dk -all |
| Policy | Record (_dmarc.thdsen.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; adkim=s; aspf=s; rua=mailto:f484fba150bc4151b7800aa6c55c2a7f@dmarc-reports.cloudflare.net; |
| www | 104.21.49.110 172.67.162.2 2606:4700:3032::6815:316e 2606:4700:3035::ac43:a202 (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: 2/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.thdsen-dk.c-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | 803F7447CC75B208DBCA042346F5D8DF… |
| SMTP _25._tcp.thdsen-dk.c-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | CFD68BDE4129C00A2402C21C0916EDF0… |
| SMTP _25._tcp.thdsen-dk.c-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | C1AD7778796D20BCA65C889A26550211… |
| SMTP _25._tcp.thdsen-dk.c-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | EA7A25255D111FC3CE4CB8FABE3ADF9C… |
| SMTP _25._tcp.thdsen-dk.c-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | 54883CC5F1849331E6BF5002C3129D20… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417559736 |
| Primary NS (MNAME) | apollo.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2026-08-17 |
| Expires | 2027-08-16 (297d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-20 22:22:41 shown | 1233ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-16 08:19:41 | 550ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-09 18:00:47 | 681ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-07 13:51:03 | 683ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-05 12:06:49 | 904ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-30 11:46:46 | 777ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-29 15:44:33 | 1422ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-25 17:35:22 | 2580ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-18 17:31:55 | 891ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-12 01:48:44 | 1928ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-11 13:40:28 | 1495ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-06 17:05:19 | 2340ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 01:01:03 | 1006ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-19 08:41:19 | 10216ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-18 08:40:03 | 4721ms | 2 NS 2 A 1 MX | 🔓 Insecure |