ato.dk

📜 Historical scan 2026-06-27 19:20:26 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ato.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 15 March 2012 (WHOIS) and 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.

🖥️ Nameservers#

2 records 250ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10	ns01.one.com	AS197495 One.com A/S
ns02.one.com	—	—	—

🌍 A Records#

1 records 232ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
20.224.21.156	3600s	—	AS8075	Microsoft Corporation	20.192.0.0/10	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

1 records 231ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	ato-dk.mail.protection.outlook.com	2a01:111:f403:ca04::d 2a01:111:f403:ca09::3 2a01:111:f403:ca09::6 2a01:111:f403:ca09::b 52.101.68.29 52.101.73.153 52.101.73.22 52.101.73.30	mail-db6pr03cu00105.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-am7pr05cu00106.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 324ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

4 records 426ms

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

✉️ SPF#

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

📨 DMARC#

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;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 13:07:50

www	20.224.21.156 (AS8075) (address records, no CNAME)
www vs bare domain	Same network ato.dk: 20.224.21.156 (AS8075) www.ato.dk: 20.224.21.156 (AS8075)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 6/10 · policy: -all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

353ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

353ms

Field	Value
Serial	2026062401
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-23 11:22:06

Field	Value
Registrar	ONE.COM A/S
Registered	2012-03-15
Expires	2027-03-31 (158d)

🔗 Same registrant#

4 domains

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).

Domain	Registrar
offentligetandlaeger.dk	ONE.COM A/S
offentligetandlæger.dk	ONE.COM A/S
tandlaegejob.dk	Punktum dk A/S (direct)
tandlægejob.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

250ms

232ms

231ms

AAAA

229ms

TXT

426ms

CAA

233ms

HTTPS

236ms

TLSA

396ms

SOA

353ms

MTA-STS

280ms

DNSSEC

353ms

SRV

324ms

Total

1486ms

🕐 Scan History#

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 shown	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	930ms	2 NS 1 A 1 MX	🔒 Secure