twu.dk is a .dk domain served by 2 nameservers (adele.ns.cloudflare.com, jobs.ns.cloudflare.com). It was registered on 10 May 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.protonmail.ch, mailsec.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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| TXT Record |
|---|
| protonmail-verification=952736fcf855e94779102faa9a0a402d81700433 |
| v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (twu.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (_dmarc.twu.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| Check | Result |
|---|---|
| Status | 🔒 Enforce |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✓ Valid |
| Mode | enforce |
| Policy ID | 20230906000000Z |
| max_age | 604800s |
| Policy MX | mail.protonmail.ch, mailsec.protonmail.ch |
| www | Exists, no address |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| default | — | Revoked (empty key) |
| dkim | — | Revoked (empty key) |
| k1 | — | Revoked (empty key) |
| — | Revoked (empty key) | |
| s1 | — | Revoked (empty key) |
| s2 | — | Revoked (empty key) |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
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… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.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 | 2415594758 |
| Primary NS (MNAME) | adele.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2012-05-10 |
| Expires | 2033-05-31 (2418d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 11:10:56 | 2071ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-10-04 07:05:51 | 720ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-24 03:48:46 shown | 827ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-20 11:27:31 | 838ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-15 23:19:57 | 1756ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-21 00:22:24 | 8389ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-08 17:06:47 | 1175ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-06 23:38:17 | 1212ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-27 09:35:01 | 17072ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-18 16:11:44 | 2707ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-17 16:00:32 | 1367ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-03 15:00:18 | 1109ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-23 17:33:11 | 3128ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-22 15:14:10 | 1187ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 12:11:46 | 5840ms | 2 NS 0 A 2 MX | 🔒 Secure |