a21.dk DNS records

🖥️ Nameservers2 records 41ms

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 51ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
77.111.240.215	3600s	webcluster1.wordpresspod1-cph3.one.com	AS51468	One.com A/S	77.111.240.0/22	🇩🇰 Denmark	Copenhagen

📧 MX Records1 records 53ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	600s	a21-dk.mail.protection.outlook.com	2a01:111:f403:ca04::b 2a01:111:f403:ca09::c 2a01:111:f403:ca09::d 2a01:111:f403:ca48::a 52.101.68.8 52.101.73.16 52.101.73.19 52.101.73.24	mail-dbbpr03cu00103.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr04cu00803.inbound.protection.outlook.com mail-as8pr05cu00300.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 → 40.104.116.24
🔶 Autoconfig	77.111.240.215

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 64ms

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

📝 TXT Records4 records 186ms

TXT Record
google-site-verification=oLGzO2ygNO2SlxLR9SyeJax5n_XildhJb9x3lo26w60
MS=ms44574969
MS=ms52225617
v=spf1 ip4:62.116.200.20 ip4:152.115.82.69 ip4:195.249.225.194 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (a21.dk)
-all (hard fail)	v=spf1 ip4:62.116.200.20 ip4:152.115.82.69 ip4:195.249.225.194 include:spf.protection.outlook.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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.a21.dk	a21.dk.acme.service.one.com

🔗 TLSA / DANE

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

🔐 DNSSEC91ms

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

🏷️ SOA0ms

Field	Value
Serial	2022060201
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

41ms

A

51ms

MX

53ms

AAAA

45ms

TXT

186ms

CAA

59ms

HTTPS

54ms

TLSA

750ms

SOA

0ms

MTA-STS

71ms

DNSSEC

91ms

SRV

64ms

Total

1349ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 04:00:07	1349ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-23 00:51:13	973ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-21 08:38:58	751ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 18:00:31	1435ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 12:38:57	4607ms	2 NS 1 A 1 MX	🔒 Secure	View