viborgkatedralskole.dk DNS records

🖥️ Nameservers2 records 61ms

Nameserver	IP addresses	PTR	ASN / ISP
meiling.ns.cloudflare.com	108.162.194.254 162.159.38.254 172.64.34.254 2606:4700:50::a29f:26fe 2803:f800:50::6ca2:c2fe 2a06:98c1:50::ac40:22fe	meiling.ns.cloudflare.com meiling.ns.cloudflare.com meiling.ns.cloudflare.com meiling.ns.cloudflare.com meiling.ns.cloudflare.com meiling.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
sullivan.ns.cloudflare.com	108.162.195.161 162.159.44.161 172.64.35.161 2606:4700:58::a29f:2ca1 2803:f800:50::6ca2:c3a1 2a06:98c1:50::ac40:23a1	sullivan.ns.cloudflare.com sullivan.ns.cloudflare.com sullivan.ns.cloudflare.com sullivan.ns.cloudflare.com sullivan.ns.cloudflare.com sullivan.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 32ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.94.110	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.222.187	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records2 records 40ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	300s	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)2 records 41ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3036::6815:5e6e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:debb	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 46ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.94.110,172.67.222.187 ech=AEX+DQBBzAAgACDHpwnbqQRrQxFsGzA/yaOSD5TTc2/1Vd5JMCQghbIcfwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:5e6e,2606:4700:3037::ac43:debb

📝 TXT Records1 records 209ms

TXT Record
v=spf1 a mx ip4:93.191.155.253 -all

✉️ SPF

Policy	Record (viborgkatedralskole.dk)
-all (hard fail)	v=spf1 a mx ip4:93.191.155.253 -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)

🔐 DNSSEC81ms

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

🏷️ SOA0ms

Field	Value
Serial	2413238733
Primary NS (MNAME)	meiling.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

61ms

A

32ms

MX

40ms

AAAA

41ms

TXT

209ms

CAA

32ms

HTTPS

46ms

TLSA

70ms

SOA

0ms

MTA-STS

69ms

DNSSEC

81ms

SRV

76ms

Total

633ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 17:22:49	633ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-08-26 21:43:49	623ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-08-25 16:19:11	1526ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-08-15 01:19:19	1432ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-08-10 16:05:04	3927ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-07-21 13:05:52	16925ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-06-27 19:04:53	1623ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-06-23 14:54:47	891ms	2 NS 2 A 2 MX	🔒 Secure	View
2026-06-17 21:40:07	1007ms	2 NS 2 A 2 MX	🔒 Secure	View