undervisningsbiblioteket.dk

📜 Historical scan 2026-06-22 18:38:44  ·  ← 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 not DNSSEC-signed, 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   59ms
NameserverIP addressesPTRASN / 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   105ms
IPTTLPTRASNISP / OrgCIDRCountryCity
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   74ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2a06:98c1:3120::1 300s — AS13335 Cloudflare, Inc. 2a06:98c1:3120:0:0:0:0:0/46 — —
2a06:98c1:3121::1 300s — AS13335 Cloudflare, Inc. 2a06:98c1:3120:0:0:0:0:0/46 — —

🔐 HTTPS Records#

1 records   59ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=188.114.96.1,188.114.97.1 ech=AEX+DQBB2wAgACAbKO5MwSeldLh98bnoG4oxcP7XK8GgmDwzHtDzGChCUAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::1,2a06:98c1:3121::1

📝 TXT Records#

1 records   445ms
TXT Record
google-site-verification=CNQ2iPf9dtQf9LQ67fIRm-wHCnQY3t2OfbIknrw_gbc

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 2026-10-26 03:16:45
www104.21.68.79 172.67.191.244 2606:4700:3030::ac43:bff4 2606:4700:3035::6815:444f (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceCompact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔗 TLSA / DANE#

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

🔐 DNSSEC#

196ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2407552838
Primary NS (MNAME)maciej.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-24 15:24:15
FieldValue
RegistrarSimply.com A/S
Registered2026-06-18
Expires2027-06-17 (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).

DomainRegistrar
tidstotal.dkSimply.com A/S
📋 WHOIS#

⏱️ Lookup Timing#

NS
59ms
A
105ms
MX
64ms
AAAA
74ms
TXT
445ms
CAA
69ms
HTTPS
59ms
TLSA
61ms
SOA
0ms
MTA-STS
65ms
DNSSEC
196ms
SRV
1854ms
Total
2498ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
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 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 shown 2498ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-19 08:35:32 4371ms 2 NS 2 A 0 MX 🔓 Insecure
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