tdc-proton.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 17 December 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.protonmail.ch. The zone is DNSSEC-signed and validates, publishes a 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.protonmail.ch | 176.119.200.128 185.205.70.128 185.70.42.128 |
mail.protonmail.ch mail.protonmail.ch mail.protonmail.ch |
AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG |
| TXT Record |
|---|
| protonmail-verification=ccaf0c192f193a54a28496728436c283a35ecc41 |
| v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (tdc-proton.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (_dmarc.tdc-proton.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:cv1zdpyr@ag.dmarcian-eu.com; ruf=mailto:cv1zdpyr@fr.dmarcian-eu.com; |
| www | 46.30.211.38 (AS51468) (address records, no CNAME) |
| www vs bare domain | Only www resolves (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 3/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026101101 |
| 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 | Eurodns S.A |
| Registered | 2017-12-17 |
| Expires | 2026-12-31 (72d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-11 21:24:27 shown | 391ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-30 10:50:27 | 363ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-19 00:54:16 | 658ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-25 17:16:27 | 506ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-24 11:22:50 | 4882ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-12 08:03:22 | 1308ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-30 00:08:50 | 6618ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-18 06:59:14 | 2847ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-15 21:39:02 | 906ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-17 21:45:21 | 526ms | 2 NS 0 A 1 MX | 🔒 Secure |