a4.dk is a .dk domain served by 3 nameservers (ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com). It was registered on 16 February 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 76.76.21.21 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 76.76.21.21 | 3600s | — | AS16509 | Amazon.com, Inc. | 76.76.21.0/24 | 🇺🇸 United States | Walnut |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| TXT Record |
|---|
| MS=ms62243683 |
| v=spf1 include:spf.protection.outlook.com include:spf.mailanyone.net ip4:89.221.165.18/28 ~all |
| Policy | Record (a4.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.protection.outlook.com include:spf.mailanyone.net ip4:89.221.165.18/28 ~all |
| Policy | Record (_dmarc.a4.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; pct=100; |
| www CNAME | cname.vercel-dns.com (all on vercel-dns.com) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 0 |
| Primary NS (MNAME) | ns1.digitalocean.com |
| Responsible (RNAME) | hostmaster@a4.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1998-02-16 |
| Expires | 2036-03-31 (3453d) |
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 |
|---|---|---|---|
| 2026-09-30 15:31:39 | 1130ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-29 23:01:22 | 1183ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-04 18:21:39 shown | 1191ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-02 12:24:05 | 1468ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-07-11 22:36:55 | 1480ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-07-08 13:04:23 | 32841ms | 3 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-26 02:35:24 | 4534ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-24 10:43:23 | 1132ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 12:38:56 | 1234ms | 3 NS 1 A 4 MX | 🔓 Insecure |