st21.dk

📜 Historical scan 2026-08-16 12:15:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

st21.dk is a .dk domain served by 2 nameservers (athena.ns.cloudflare.com, brodie.ns.cloudflare.com). It was registered on 9 March 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.226.145.173 is hosted by Netnoerden ApS (AS216275) in Denmark. Mail is handled by pmg.st21.dk. The zone is not DNSSEC-signed, publishes a 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#

2 records 66ms

Nameserver	IP addresses	PTR	ASN / ISP
athena.ns.cloudflare.com	108.162.192.72 172.64.32.72 173.245.58.72 2606:4700:50::adf5:3a48 2803:f800:50::6ca2:c048 2a06:98c1:50::ac40:2048	athena.ns.cloudflare.com athena.ns.cloudflare.com athena.ns.cloudflare.com athena.ns.cloudflare.com athena.ns.cloudflare.com athena.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
brodie.ns.cloudflare.com	108.162.195.237 162.159.44.237 172.64.35.237 2606:4700:58::a29f:2ced 2803:f800:50::6ca2:c3ed 2a06:98c1:50::ac40:23ed	brodie.ns.cloudflare.com brodie.ns.cloudflare.com brodie.ns.cloudflare.com brodie.ns.cloudflare.com brodie.ns.cloudflare.com brodie.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

1 records 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.226.145.173	300s	—	AS216275	Netnoerden ApS	91.226.144.0/23	🇩🇰 Denmark	Frederiksberg

📧 MX Records#

1 records 51ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	pmg.st21.dk	91.226.145.173	pmg.st21.dk	AS216275 Netnoerden ApS

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	mail.st21.dk → 91.226.145.173
🔶 Autoconfig	91.226.145.173

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 266ms

TXT Record
google-site-verification=nCrSAxOcjdbPZWWQwwln6Fz8SR3DKD1gkO_AB5lMpQI
v=spf1 include:dnsexit.com ip4:91.226.145.173 -all

✉️ SPF#

Policy	Record (st21.dk)
-all (hard fail)	v=spf1 include:dnsexit.com ip4:91.226.145.173 -all

📨 DMARC#

Policy	Record (_dmarc.st21.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:ipm5q1t@ar.glockapps.com; ruf=mailto:ipm5q1t@fr.glockapps.com; fo=1;

📬 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 2026-10-13 10:20:55

www	91.226.145.173 (AS216275) (address records, no CNAME)
www vs bare domain	Same network st21.dk: 91.226.145.173 (AS216275) www.st21.dk: 91.226.145.173 (AS216275)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	Delete signal: the zone asks the registry to remove its DS (go insecure) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

87ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2412322117
Primary NS (MNAME)	athena.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-04 01:01:53

Field	Value
Registrar	Simply.com A/S
Registered	2022-03-09
Expires	2028-03-08 (506d)

📋 WHOIS#

⏱️ Lookup Timing#

66ms

43ms

51ms

AAAA

51ms

TXT

266ms

CAA

31ms

HTTPS

50ms

TLSA

4032ms

SOA

0ms

MTA-STS

77ms

DNSSEC

87ms

SRV

103ms

Total

5081ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 00:44:11	4469ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-03 00:39:53	4441ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-01 00:31:45	2499ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-30 07:14:57	4447ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-28 20:55:15	1138ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-27 20:45:31	1876ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-23 19:07:53	1714ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-18 08:19:46	2166ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-11 06:39:26	2036ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-27 06:16:20	2889ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-16 12:15:49 shown	5081ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-05 22:14:55	957ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-03 02:38:50	1068ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-23 18:14:08	7478ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-21 14:59:47	1018ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-17 11:46:59	901ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-01 04:57:21	1333ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-27 22:44:51	769ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-17 12:14:44	1034ms	2 NS 1 A 1 MX	🔓 Insecure