4b.dk DNS records

🖥️ Nameservers2 records 29ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.scannet2.dk	185.25.141.9 2a02:2339:4006:10d::4171:4171	ns1.scannet.dk ns1.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.scannet2.dk	2a02:2339:1:112:0:5:1:b11 91.197.248.72	ns2.scannet.dk ns2.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records1 records 29ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.43.11	3600s	linux11.scannet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records1 records 34ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	4b-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::b 2a01:111:f403:ca09::3 2a01:111:f403:ca09::e 52.101.68.12 52.101.68.32 52.101.73.11 52.101.73.8	mail-du2pr03cu00102.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am0pr04cu00500.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 Records1 records 38ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	100	5061	sipfed.online.lync.com

📝 TXT Records5 records 134ms

TXT Record
_globalsign-domain-verification=0c0HCdJDXk0hisMXTISSPPye-P9K26uE6OlQadXxK-
_globalsign-domain-verification=juivoWS4y5o27vxgZzwUDerzQPax6bfTmJLDmVn7eX
MS=ms37384634
P-b492TBVmzz
v=spf1 ip4:91.215.163.163 ip4:79.142.235.115 ip4:185.157.16.136 include:spf.protection.outlook.com include:spf.comendosystems.com include:spf.zentura.dk include:spf-de.emailsignatures365.com include:spf.permido.com -all

✉️ SPF

Policy	Record (4b.dk)
-all (hard fail)	v=spf1 ip4:91.215.163.163 ip4:79.142.235.115 ip4:185.157.16.136 include:spf.protection.outlook.com include:spf.comendosystems.com include:spf.zentura.dk include:spf-de.emailsignatures365.com include:spf.permido.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)

🔐 DNSSEC56ms

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

🏷️ SOA27ms

Field	Value
Serial	2024090301
Primary NS (MNAME)	ns.scannet2.dk
Responsible (RNAME)	hostmaster@scannet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

29ms

A

29ms

MX

34ms

AAAA

34ms

TXT

134ms

CAA

31ms

HTTPS

27ms

TLSA

131ms

SOA

27ms

MTA-STS

33ms

DNSSEC

56ms

SRV

38ms

Total

727ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-06-29 10:20:36	727ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-25 20:53:16	1226ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-25 15:23:39	1694ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 21:51:17	1606ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 12:43:55	942ms	2 NS 1 A 1 MX	🔒 Secure	View