21century.dk

📜 Historical scan 2026-06-16 12:50:20 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

21century.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 11 August 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.89 is hosted by team.blue Denmark A/S (AS48854) in Denmark. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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#

4 records 140ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	—	—	—
ns2.simply.com	—	—	—
ns3.simply.com	—	—	—
ns4.simply.com	—	—	—

🌍 A Records#

1 records 68ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.89	—	linux211.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝

No TXT records found

✉️ 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 2026-10-21 22:12:02

www	93.191.156.89 (AS48854) (address records, no CNAME)
www vs bare domain	Same network 21century.dk: 93.191.156.89 (AS48854) www.21century.dk: 93.191.156.89 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: 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#

187ms

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

🏷️ SOA#

191ms

Field	Value
Serial	2024020700
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-11 07:29:22

Field	Value
Registrar	Simply.com A/S
Registered	2016-08-11
Expires	2027-08-31 (307d)

📋 WHOIS#

⏱️ Lookup Timing#

140ms

68ms

94ms

AAAA

74ms

TXT

337ms

CAA

241ms

HTTPS

70ms

TLSA

150ms

SOA

191ms

MTA-STS

122ms

DNSSEC

187ms

SRV

0ms

Total

1173ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-21 22:12:02	381ms	4 NS 1 A 0 MX	🔒 Secure
2026-10-07 23:41:45	295ms	4 NS 1 A 0 MX	🔒 Secure
2026-10-01 01:46:11	674ms	4 NS 1 A 0 MX	🔒 Secure
2026-09-26 07:07:04	427ms	4 NS 1 A 0 MX	🔒 Secure
2026-08-26 01:43:46	526ms	4 NS 1 A 0 MX	🔒 Secure
2026-06-27 03:29:52	1000ms	4 NS 1 A 0 MX	🔒 Secure
2026-06-24 03:35:33	615ms	4 NS 1 A 0 MX	🔒 Secure
2026-06-16 12:53:26	787ms	4 NS 1 A 0 MX	🔒 Secure
2026-06-16 12:50:20 shown	1173ms	4 NS 1 A 0 MX	🔒 Secure