opticore.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 8 March 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.215.20 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod12-cph3.one.com, mx2.pub.mailpod12-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 46.30.215.20 | 3600s | webcluster1.webpod15-cph3.one.com | AS51468 | One.com A/S | 46.30.208.0/21 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod12-cph3.one.com | 104.37.34.246 | mx1.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod12-cph3.one.com | 104.37.34.247 | mx2.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod12-cph3.one.com | 104.37.34.248 | mx3.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod12-cph3.one.com | 104.37.34.249 | mx4.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:10e:a3:f16:9ad8:69bd | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 46.30.215.20 2a02:2350:5:10e:a3:f16:9ad8:69bd (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network opticore.dk: 46.30.215.20 2a02:2350:5:10e:a3:f16:9ad8:69bd (AS51468) www.opticore.dk: 46.30.215.20 2a02:2350:5:10e:a3:f16:9ad8:69bd (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| SMTP _25._tcp.mx2.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| SMTP _25._tcp.mx3.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| SMTP _25._tcp.mx4.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026070601 |
| 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 | 2024-03-08 |
| Expires | 2027-03-07 (136d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-06 15:43:44 | 558ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-23 12:07:54 | 676ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-06 12:13:01 | 817ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 22:36:42 | 560ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-19 07:49:21 | 3601ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-06 18:38:57 | 2853ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-09 00:32:29 shown | 1326ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-29 21:54:27 | 685ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 13:01:05 | 4139ms | 2 NS 1 A 4 MX | 🔒 Secure |