oa-opbyg.dk is a .dk domain served by 2 nameservers (ns1.netgiganten.dk, ns2.netgiganten.dk). It was registered on 18 March 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.20.217.249 is hosted by Atea A/S (AS21060) in Denmark. Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. 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 |
|---|---|---|---|---|---|---|---|
| 178.20.217.249 | 600s | vps.simpledigital.dk | AS21060 | Atea A/S | 178.20.216.0/23 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 195.242.130.13 |
| 🔶 Autoconfig | 195.242.130.13 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 ip4:195.242.130.13 include:_spf.netgiganten.dk +a +mx +ip4:195.242.130.15 +include:spf.protection.outlook.com ~all |
| Policy | Record (oa-opbyg.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:195.242.130.13 include:_spf.netgiganten.dk +a +mx +ip4:195.242.130.15 +include:spf.protection.outlook.com ~all |
| www CNAME | oa-opbyg.dk (all on oa-opbyg.dk) |
| Wildcard | No |
| Denial of existence | NSEC3 · 7 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
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: 4/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.oa-opbyg.dk | l5_faF6u1jj7E3nu2DqtqMDKjLUiO-aSJw_fkp7G3-s |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026091403 |
| Primary NS (MNAME) | ns1.netgiganten.dk |
| Responsible (RNAME) | hostmaster@mailrelay.e-studio.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1997-03-18 |
| Expires | 2027-03-31 (155d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 09:26:40 shown | 735ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-17 09:09:34 | 1870ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-17 04:24:45 | 1405ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-18 01:13:25 | 2750ms | 2 NS 1 A 3 MX | 🔒 Secure |