a-ptr.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 8 October 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.193 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx.simply.com. 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 |
|---|---|---|---|---|---|---|---|
| 93.191.156.193 | 3600s | linux303.unoeuro.com | AS48854 | team.blue Denmark A/S | 93.191.152.0/21 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 93.191.156.193 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| v=spf1 include:spf.simply.com -all |
| Policy | Record (a-ptr.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.simply.com -all |
| Policy | Record (_dmarc.a-ptr.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www | 93.191.156.193 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025042300 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2024-10-08 |
| Expires | 2026-10-07 (expired) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-19 15:26:57 | 446ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-18 13:36:41 | 212ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-17 13:05:37 | 138ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-16 12:43:55 | 210ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-15 08:14:42 | 212ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-14 04:48:14 | 138ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-13 03:57:28 | 220ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-12 01:38:50 | 112ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-11 01:18:03 | 157ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-09 23:57:16 | 93ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-08 21:18:53 | 3641ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-02 19:49:55 | 1901ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-17 22:53:00 | 497ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 06:52:28 | 572ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 21:01:23 | 613ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 06:56:36 | 1174ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 18:52:45 shown | 436ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 07:57:51 | 1178ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 23:23:46 | 1921ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-19 11:08:15 | 729ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 12:58:21 | 1709ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 12:55:20 | 1699ms | 3 NS 1 A 1 MX | 🔒 Secure |