ato.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.224.21.156 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by ato-dk.mail.protection.outlook.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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 20.224.21.156 | — | — | AS8075 | Microsoft Corporation | 20.192.0.0/10 | 🇳🇱 The Netherlands | — |
| TXT Record |
|---|
| google-site-verification=aR-9NhajUFHItPP5nRLYe41CsZmMH7OY_8JgY4Fv_I0 |
| MS=ms95658760 |
| nrg79t5vwwmnbzqj3yndpwxwlw5v36fl |
| v=spf1 ip4:52.137.1.133 ip4:194.182.2.244 include:spf.mandrillapp.com include:web.shared.mysmtp.com include:spf.protection.outlook.com -all |
| Policy | Record (ato.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:52.137.1.133 ip4:194.182.2.244 include:spf.mandrillapp.com include:web.shared.mysmtp.com include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.ato.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:kw4mtjma@ag.eu.dmarcian.com; ruf=mailto:kw4mtjma@fr.eu.dmarcian.com; fo=1; |
| www | 20.224.21.156 (AS8075) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-ato-dk._domainkey.dkato.onmicrosoft.com | RSA · ~2048 bit |
| selector2 | selector2-ato-dk._domainkey.dkato.onmicrosoft.com | 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: 6/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026052401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 10:52:15 | 5176ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 10:38:28 | 1139ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 22:55:05 | 1532ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 10:59:55 | 866ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 01:20:48 | 1578ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-18 05:15:05 | 5209ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-25 19:28:11 | 1652ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-27 19:20:26 | 1486ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 22:30:07 | 1112ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 13:48:08 shown | 930ms | 2 NS 1 A 1 MX | 🔒 Secure |