tobiasguldbrandsen.dk is a .dk domain served by 2 nameservers (kate.ns.cloudflare.com, kobe.ns.cloudflare.com). It was registered on 14 August 2026 (WHOIS) and first appeared in the .dk zone on 16 August 2026. Its website address 104.21.10.187 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.10.187 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.131.176 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:abb | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:83b0 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.10.187,172.67.131.176 ech=AEX+DQBBhgAgACBBB8Sy1YSXm21VyNkLKkdiXCBC0L6Ha2NNVZImQHVJegAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:abb,2606:4700:3037::ac43:83b0 |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (tobiasguldbrandsen.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.tobiasguldbrandsen.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; adkim=s; aspf=s |
| www | 104.21.10.187 172.67.131.176 2606:4700:3033::6815:abb 2606:4700:3037::ac43:83b0 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network tobiasguldbrandsen.dk: 104.21.10.187 172.67.131.176 2606:4700:3033::6815:abb 2606:4700:3037::ac43:83b0 (AS13335) www.tobiasguldbrandsen.dk: 104.21.10.187 172.67.131.176 2606:4700:3033::6815:abb 2606:4700:3037::ac43:83b0 (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| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.tobiasguldbrandsen.dk | oTwjU9PBPWBsau7Mm18s-zMZ9rRD7g3Fp0bxTrWyAhU |
| TXT | _acme-challenge.tobiasguldbrandsen.dk | zgSMjHs3sKv9mtwnSK4nbwtPhNWnt_MlDrkNXvdCoVY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417558970 |
| Primary NS (MNAME) | kate.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 | 2026-08-14 |
| Expires | 2027-08-13 (296d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 12:38:51 shown | 2397ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-15 11:31:04 | 546ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-04 10:32:40 | 471ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-04 07:04:09 | 666ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-24 04:31:42 | 654ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-11 04:00:49 | 655ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-25 20:33:22 | 1394ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-21 00:05:40 | 1926ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-19 23:40:43 | 948ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-17 17:53:16 | 3251ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-16 08:42:04 | 2187ms | 3 NS 0 A 0 MX | 🔒 Secure |