ck.dk DNS records

🖥️ Nameservers2 records 85ms

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 88ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
76.76.21.142	3600s	—	AS16509	Amazon.com, Inc.	76.76.21.0/24	🇺🇸 United States	Walnut

📧 MX Records3 records 88ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
5	600s	mx1-dk.centerasecurity.dk	128.76.60.167 128.76.60.187 89.233.19.127 89.233.19.127 89.233.19.188 89.233.19.188	mx6.centerasecurity.dk mx6.centerasecurity.dk 127.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 188.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S
5	3600s	mx2-dk.centerasecurity.dk	128.76.60.168 128.76.60.169 89.233.19.128 89.233.19.128 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk mx6.centerasecurity.dk 128.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S
20	600s	mx3-dk.centerasecurity.dk	128.76.60.187 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S

📧 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 Records4 records 293ms

TXT Record
globalsign-domain-verification=nT5Z7ojxk5IUmTQH0dj7tVCKdaq2nbCfTuh3iF-2IA
google-site-verification=yw0CiZvfsm_yiNrqKPLdqHXesu-kYcuy0HPRmtHRrV0
MS=ms97224754
v=spf1 mx ip4:217.195.185.10 include:spf.defgo.com include:_spf.centerasecurity.dk a:outbound.centerasecurity.dk -all

✉️ SPF

Policy	Record (ck.dk)
-all (hard fail)	v=spf1 mx ip4:217.195.185.10 include:spf.defgo.com include:_spf.centerasecurity.dk a:outbound.centerasecurity.dk -all

📨 DMARC

Policy	Record (_dmarc.ck.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:6320a2962289d@dmarc.centerasecurity.com;

📬 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 / DANE6 records 159ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…

🔐 DNSSEC246ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082809
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

85ms

A

88ms

MX

88ms

AAAA

101ms

TXT

293ms

CAA

105ms

HTTPS

101ms

TLSA

159ms

SOA

0ms

MTA-STS

134ms

DNSSEC

246ms

SRV

124ms

Total

1988ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 10:58:50	1988ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-08-27 01:13:07	753ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-08-14 05:05:21	4653ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-26 16:34:26	1169ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-15 03:13:21	1401ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-01 22:48:29	978ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-27 05:45:30	819ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-19 13:35:05	2891ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-18 16:39:43	3082ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 22:24:54	65535ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 21:10:23	579ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 21:04:28	2928ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 21:00:40	3022ms	2 NS 1 A 3 MX	🔒 Secure	View