undervisningsbiblioteket.dk

📜 Historical scan 2026-10-23 13:46:52 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

undervisningsbiblioteket.dk is a .dk domain served by 2 nameservers (maciej.ns.cloudflare.com, meera.ns.cloudflare.com). It was registered on 18 June 2026 (WHOIS) and first appeared in the .dk zone on 19 June 2026. Its website address 104.21.68.79 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed and validates, publishes a 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 105ms

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 Records#

2 records 42ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.68.79	30s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.191.244	30s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 86ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:bff4	30s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:444f	30s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 97ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.68.79,172.67.191.244 ech=AEX+DQBBqQAgACBKxsp8NEIrp/Rvlj8aDrhIVZNY1iw8eRvwJcLNLn6MLgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:bff4,2606:4700:3035::6815:444f

📝 TXT Records#

2 records 181ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-26 03:16:45

www	104.21.68.79 172.67.191.244 2606:4700:3030::ac43:bff4 2606:4700:3035::6815:444f (AS13335) (address records, no CNAME)
www vs bare domain	Same network undervisningsbiblioteket.dk: 104.21.68.79 172.67.191.244 2606:4700:3030::ac43:bff4 2606:4700:3035::6815:444f (AS13335) www.undervisningsbiblioteket.dk: 104.21.68.79 172.67.191.244 2606:4700:3030::ac43:bff4 2606:4700:3035::6815:444f (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
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: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

176ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	delv transient; dig AD confirmed

🏷️ SOA#

23ms

Field	Value
Serial	2417476959
Primary NS (MNAME)	maciej.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-24 15:24:15

Field	Value
Registrar	Simply.com A/S
Registered	2026-06-18
Expires	2027-06-17 (232d)

🔗 Same registrant#

1 domain

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
tidstotal.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

105ms

42ms

77ms

AAAA

86ms

TXT

181ms

CAA

89ms

HTTPS

97ms

TLSA

92ms

SOA

23ms

MTA-STS

107ms

DNSSEC

176ms

SRV

132ms

Total

1328ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-26 03:16:45	2575ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-24 15:09:53	455ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-23 13:46:52 shown	1328ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-17 06:06:27	1497ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-16 05:19:40	1222ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-15 03:02:27	1882ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-08 14:10:38	955ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-02 11:31:58	620ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-30 11:29:32	529ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-24 14:25:16	607ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-09 04:06:44	1262ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-02 17:02:20	1254ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-01 13:24:06	688ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-27 03:48:36	587ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-25 20:01:07	750ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-19 00:28:00	2975ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-17 20:16:17	3836ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-15 19:11:46	1083ms	2 NS 2 A 0 MX	🔒 Secure
2026-07-22 06:05:56	812ms	2 NS 2 A 0 MX	🔒 Secure
2026-07-07 00:11:48	1093ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-29 04:06:35	788ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-28 01:34:52	1123ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-23 00:47:08	941ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-22 18:38:44	2498ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-19 08:35:32	4371ms	2 NS 2 A 0 MX	🔓 Insecure