techteori.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 31 March 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 95.166.171.238 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by .. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 95.166.171.238 | 3600s | 95-166-171-238-static.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 95.166.128.0/17 | 🇩🇰 Denmark | Brønshøj |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| www CNAME | techteori.dk (all on techteori.dk) → 95.166.171.238 (AS3292) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100501 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2025-03-31 |
| Expires | 2027-03-30 (157d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:50:31 shown | 347ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-05 18:07:17 | 513ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 17:39:53 | 692ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 20:17:18 | 513ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-20 14:49:29 | 987ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-05 12:06:07 | 903ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 09:02:17 | 682ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-13 08:27:21 | 4631ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-07 05:52:38 | 578ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-06 16:41:21 | 2155ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 15:17:30 | 8755ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 02:54:02 | 776ms | 2 NS 1 A 4 MX | 🔒 Secure |