viborgkatedralskole.dk

📜 Historical scan 2026-08-25 16:19:11 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

viborgkatedralskole.dk is a .dk domain served by 2 nameservers (meiling.ns.cloudflare.com, sullivan.ns.cloudflare.com). It was registered on 8 June 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.94.110 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 90ms

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 Records#

2 records 125ms

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 Records#

2 records 85ms

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 85ms

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 Records#

1 records 87ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.94.110,172.67.222.187 ech=AEX+DQBB3QAgACANZZD4/H2thbBLnTNJyLm3eCjbGOLeQewG9SHS5P4HDQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:5e6e,2606:4700:3037::ac43:debb

📝 TXT Records#

1 records 368ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-12 22:17:31

www	104.21.94.110 172.67.222.187 2606:4700:3036::6815:5e6e 2606:4700:3037::ac43:debb (AS13335) (address records, no CNAME)
www vs bare domain	Same network viborgkatedralskole.dk: 104.21.94.110 172.67.222.187 2606:4700:3036::6815:5e6e 2606:4700:3037::ac43:debb (AS13335) www.viborgkatedralskole.dk: 104.21.94.110 172.67.222.187 2606:4700:3036::6815:5e6e 2606:4700:3037::ac43:debb (AS13335)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.viborgkatedralskole.dk	JLe_DNk9iIMrSABB_CTlSeVi_6HsfIgD5XOGNC9EkyQ
TXT	_acme-challenge.viborgkatedralskole.dk	x4lAWp4pIAenZaQeFF0zVy2BapkZm9q_pPbjLYcL0Kc

🔗 TLSA / DANE#

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

🔐 DNSSEC#

284ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2413107581
Primary NS (MNAME)	meiling.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-09 02:14:50

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2000-06-08
Expires	2027-06-30 (254d)

📋 WHOIS#

⏱️ Lookup Timing#

90ms

125ms

85ms

AAAA

85ms

TXT

368ms

CAA

77ms

HTTPS

87ms

TLSA

159ms

SOA

0ms

MTA-STS

118ms

DNSSEC

284ms

SRV

150ms

Total

1526ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 02:46:47	1192ms	2 NS 2 A 2 MX	🔒 Secure
2026-09-30 23:35:36	767ms	2 NS 2 A 2 MX	🔒 Secure
2026-09-07 21:34:54	2775ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-31 17:22:49	633ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-26 21:43:49	623ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-25 16:19:11 shown	1526ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-15 01:19:19	1432ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-10 16:05:04	3927ms	2 NS 2 A 2 MX	🔒 Secure
2026-07-21 13:05:52	16925ms	2 NS 2 A 2 MX	🔒 Secure
2026-06-27 19:04:53	1623ms	2 NS 2 A 2 MX	🔒 Secure
2026-06-23 14:54:47	891ms	2 NS 2 A 2 MX	🔒 Secure
2026-06-17 21:40:07	1007ms	2 NS 2 A 2 MX	🔒 Secure