undervisningsbiblioteket.dk DNS records

🖥️ Nameservers2 records 51ms

Nameserver	IP addresses	PTR	ASN / ISP
maciej.ns.cloudflare.com	108.162.195.42 162.159.44.42 172.64.35.42 2606:4700:58::a29f:2c2a 2803:f800:50::6ca2:c32a 2a06:98c1:50::ac40:232a	maciej.ns.cloudflare.com maciej.ns.cloudflare.com maciej.ns.cloudflare.com maciej.ns.cloudflare.com maciej.ns.cloudflare.com maciej.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
meera.ns.cloudflare.com	108.162.192.195 172.64.32.195 173.245.58.195 2606:4700:50::adf5:3ac3 2803:f800:50::6ca2:c0c3 2a06:98c1:50::ac40:20c3	meera.ns.cloudflare.com meera.ns.cloudflare.com meera.ns.cloudflare.com meera.ns.cloudflare.com meera.ns.cloudflare.com meera.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.68.79	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.191.244	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)2 records 49ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:bff4	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:444f	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 59ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.68.79,172.67.191.244 ech=AEX+DQBBiQAgACAh43C2TFXW7yZVBfnmADA2vp/wRBkfjVk+7o2VHkdIAwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:bff4,2606:4700:3035::6815:444f

📝 TXT Records2 records 227ms

TXT Record
google-site-verification=CNQ2iPf9dtQf9LQ67fIRm-wHCnQY3t2OfbIknrw_gbc
v=spf1 -all

✉️ SPF

Policy	Record (undervisningsbiblioteket.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC

Policy	Record (_dmarc.undervisningsbiblioteket.dk)
p=reject	v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;

📬 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)

🔐 DNSSEC87ms

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

🏷️ SOA0ms

Field	Value
Serial	2412488396
Primary NS (MNAME)	maciej.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

51ms

A

43ms

MX

50ms

AAAA

49ms

TXT

227ms

CAA

55ms

HTTPS

59ms

TLSA

77ms

SOA

0ms

MTA-STS

68ms

DNSSEC

87ms

SRV

81ms

Total

1254ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-02 17:02:20	1254ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-09-01 13:24:06	688ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-27 03:48:36	587ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-25 20:01:07	750ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-19 00:28:00	2975ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-17 20:16:17	3836ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-15 19:11:46	1083ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-07-22 06:05:56	812ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-07-07 00:11:48	1093ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-29 04:06:35	788ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-28 01:34:52	1123ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-23 00:47:08	941ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-22 18:38:44	2498ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-19 08:35:32	4371ms	2 NS 2 A 0 MX	🔓 Insecure	View