vertex.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 1 February 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 128.76.131.206 is hosted by TDC Holding A/S (AS3292) in Denmark. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 128.76.131.206 | 43200s | 128-76-131-206-static.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 128.76.128.0/17 | 🇩🇰 Denmark | Vejle |
| TXT Record |
|---|
| protonmail-verification=379bb6743a6832fb71179b6495bda84b6a680692 |
| v=spf1 include:_spf.protonmail.ch include:_custspf.one.com mx ~all |
| Policy | Record (vertex.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch include:_custspf.one.com mx ~all |
| Policy | Record (_dmarc.vertex.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www CNAME | vertex.dk (all on vertex.dk) → 128.76.131.206 (AS3292) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.vertex.dk | vertex.dk |
| TXT | vertex.dk | protonmail-verification=379bb6743a6832fb71179b6495bda84b6a680692 |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092101 |
| 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 | 2011-02-01 |
| Expires | 2027-02-28 (127d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 20:52:45 | 740ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 01:32:27 | 754ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-30 07:29:29 | 563ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 11:31:02 shown | 1141ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-30 13:09:14 | 755ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-07 09:47:03 | 1605ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-30 12:54:21 | 729ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-26 18:41:49 | 1212ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-24 23:11:24 | 2337ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-24 12:03:16 | 1149ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-24 11:20:24 | 1006ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 22:12:07 | 939ms | 2 NS 1 A 2 MX | 🔒 Secure |