4-b.dk DNS records

🖥️ Nameservers2 records 94ms

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 Records1 records 85ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
77.111.240.199	3600s	webcluster1.wordpresspod1-cph3.one.com	AS51468	One.com A/S	77.111.240.0/22	🇩🇰 Denmark	Copenhagen

📧 MX Records1 records 112ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	4b-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::1 2a01:111:f403:ca48::8 2a01:111:f403:ca48::c 52.101.68.18 52.101.68.3 52.101.73.12 52.101.73.155	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00401.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-miypr03cu00104.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am7pr02cu00203.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 → 40.104.116.8

🔷 AAAA Records (IPv6)1 records 145ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:101:38:38b6:fbdb:4488	3600s	—	AS51468	One.com A/S	2a02:2350:0:0:0:0:0:0/32	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 165ms

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

📝 TXT Records1 records 395ms

TXT Record
v=spf1 include:spf.catglobe.com include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF

Policy	Record (4-b.dk)
-all (hard fail)	v=spf1 include:spf.catglobe.com include:spf.protection.outlook.com include:_custspf.one.com -all

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 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)

🔐 DNSSEC360ms

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

🏷️ SOA0ms

Field	Value
Serial	2026083005
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

94ms

A

85ms

MX

112ms

AAAA

145ms

TXT

395ms

CAA

115ms

HTTPS

152ms

TLSA

429ms

SOA

0ms

MTA-STS

202ms

DNSSEC

360ms

SRV

165ms

Total

2447ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 16:42:02	2447ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-30 14:50:46	748ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-09 15:08:25	4512ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-06 16:51:51	1802ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-04 12:34:06	1828ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-28 02:05:33	1794ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-27 01:38:06	9116ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-26 01:19:47	3003ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-25 01:03:14	9643ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-23 22:33:16	3210ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-22 22:01:26	9567ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-21 20:01:36	1283ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-20 09:48:16	9237ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-19 02:07:57	1703ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-17 23:12:48	3436ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-16 16:56:10	1162ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-14 14:10:32	1072ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-09 05:40:56	4610ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-06 10:15:46	4978ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-04 20:49:35	2617ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-03 19:55:52	4908ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-01 20:51:04	1012ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-26 15:47:25	870ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-21 08:58:27	1088ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 12:49:00	876ms	2 NS 1 A 1 MX	🔒 Secure	View