4o.dk is a .dk domain served by 2 nameservers (melinda.ns.cloudflare.com, tom.ns.cloudflare.com). It was registered on 20 December 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.5.54.181 is hosted by UAB Interneto vizija (AS212531) in Lithuania. Mail is handled by mail.4o.dk. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 185.5.54.181 | 300s | — | AS212531 | UAB Interneto vizija | 185.5.52.0/22 | 🇱🇹 Lithuania | Vilnius |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.4o.dk | 83.89.250.10 | 0x5359fa0a.static.cust.fastspeed.dk | AS3292 TDC Holding A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 83.89.250.10 |
| 🔶 Autoconfig | 83.89.250.10 |
| www | 185.5.54.181 (AS212531) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2415758599 |
| Primary NS (MNAME) | melinda.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 | 2016-12-20 |
| Expires | 2026-12-31 (73d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 16:06:50 shown | 927ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 21:09:12 | 742ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-25 13:30:47 | 616ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 13:18:37 | 2484ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 02:07:58 | 1192ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-19 09:52:11 | 643ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 17:02:31 | 913ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-29 06:13:40 | 3518ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-27 13:22:21 | 875ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-25 12:34:32 | 1311ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 16:58:57 | 873ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 22:03:51 | 4822ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 05:59:06 | 956ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 12:42:23 | 527ms | 2 NS 1 A 1 MX | 🔓 Insecure |