3r.dk DNS records

🖥️ Nameservers2 records 64ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records

🌍

No A records found

📧 MX Records1 records 61ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	3r-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca09::6 2a01:111:f403:ca09::b 2a01:111:f403:ca09::e 52.101.103.137 52.101.73.11 52.101.73.123 52.101.73.16	mail-dbapr03cu00100.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com mail-as2pr05cu00100.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

📝 TXT Records2 records 206ms

TXT Record
MS=ms71735942
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (3r.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC

Policy	Record (_dmarc.3r.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:05467b80528a516@rep.dmarcanalyzer.com; ruf=mailto:05467b80528a516@for.dmarcanalyzer.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

🔗 TLSA / DANE

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

🔐 DNSSEC151ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA0ms

Field	Value
Serial	2026081101
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

64ms

A

38ms

MX

61ms

AAAA

38ms

TXT

206ms

CAA

55ms

HTTPS

38ms

TLSA

329ms

SOA

0ms

MTA-STS

73ms

DNSSEC

151ms

SRV

82ms

Total

1175ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 14:04:43	1175ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-08-11 17:52:34	1224ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-07-17 22:00:04	1589ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-07-12 21:51:07	8969ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-06-20 00:55:03	1625ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-06-16 13:14:17	834ms	2 NS 0 A 1 MX	🔒 Secure	View