tautologi.dk is a .dk domain served by 2 nameservers (bjorn.ns.cloudflare.com, haley.ns.cloudflare.com). It was registered on 6 February 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.16.164 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by route1.mx.cloudflare.net, route3.mx.cloudflare.net and 1 more. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.16.164 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.214.218 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.214.218 |
| 🔶 Autoconfig | 104.21.16.164 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:10a4 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:d6da | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.16.164,172.67.214.218 ech=AEX+DQBB1AAgACB3Rs2Of5ohI+V3cBeoyVZ3cJwizvJ/vqr1DG6SWxTNSgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:10a4,2606:4700:3034::ac43:d6da |
| TXT Record |
|---|
| tautologi.dk is tautologi.dk |
| v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (tautologi.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (_dmarc.tautologi.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:08b84ed52d114e86838b9f89a704ce61@dmarc-reports.cloudflare.net |
| www | 104.21.16.164 172.67.214.218 2606:4700:3035::6815:10a4 2606:4700:3035::ac43:d6da (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network tautologi.dk: 104.21.16.164 172.67.214.218 2606:4700:3035::6815:10a4 2606:4700:3035::ac43:d6da (AS13335) www.tautologi.dk: 104.21.16.164 172.67.214.218 2606:4700:3035::6815:10a4 2606:4700:3035::ac43:d6da (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2406822728 |
| Primary NS (MNAME) | bjorn.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 | 2013-02-06 |
| Expires | 2027-07-31 (277d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-11 07:36:31 | 691ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-09 07:20:11 | 5187ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-01 02:52:34 | 969ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-16 21:11:16 | 10412ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-05 12:48:58 | 1060ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-24 15:06:40 | 1964ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-11 13:07:01 | 6856ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-31 18:50:28 | 1934ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-06 19:04:30 | 15069ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-23 17:02:05 shown | 3733ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-23 12:24:40 | 1128ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 13:11:43 | 6371ms | 2 NS 2 A 3 MX | 🔒 Secure |