port53.dk

📜 Historical scan 2026-08-20 13:18:47  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

port53.dk is a .dk domain served by 7 nameservers (ns21.cloudns.net, ns23.cloudns.net, ns24.cloudns.net and 4 more). It was registered on 2 November 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.107.169.23 is hosted by BornFiber Service Provider ApS (AS24800) in Denmark. Mail is handled by mailforward21.cloudns.net, mailforward22.cloudns.net. 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#

7 records   91ms
NameserverIP addressesPTRASN / ISP
ns21.cloudns.net 109.201.133.61
2a00:1768:1001:9::21		 ns21.cloudns.net
ns21.cloudns.net		 AS43350 NForce Entertainment B.V.
AS43350 NForce Entertainment B.V.
ns23.cloudns.net 185.10.19.116
2a07:8dc0:1b:0:72:4eff:febc:d52d		 ns23.cloudns.net
ns23.cloudns.net		 AS35661 Virtua Systems SAS
AS35661 Virtua Systems SAS
ns24.cloudns.net 185.206.180.71
2a0b:1640:1:1:1:1:213:845c		 ns24.cloudns.net
ns24.cloudns.net		 AS205787 Public Cloud Ltd.
AS205787 Public Cloud Ltd.
pns21.cloudns.net 185.136.96.96
2a06:fb00:1::1:96		 pns21.cloudns.net
pns21.cloudns.net		 AS203391 Cloud DNS Ltd
AS203391 Cloud DNS Ltd
pns22.cloudns.net 185.136.97.96
2a06:fb00:1::2:96		 pns22.cloudns.net
pns22.cloudns.net		 AS203391 Cloud DNS Ltd
AS203391 Cloud DNS Ltd
pns23.cloudns.net 185.136.98.96
2a06:fb00:1::3:96		 pns23.cloudns.net
pns23.cloudns.net		 AS203391 Cloud DNS Ltd
AS203391 Cloud DNS Ltd
pns24.cloudns.net 185.136.99.96
2a06:fb00:1::4:96		 pns24.cloudns.net
pns24.cloudns.net		 AS203391 Cloud DNS Ltd
AS203391 Cloud DNS Ltd

🌍 A Records#

1 records   73ms
IPTTLPTRASNISP / OrgCIDRCountryCity
185.107.169.23 3600s — AS24800 BornFiber Service Provider ApS 185.107.168.0/22 🇩🇰 Denmark Rønne

📧 MX Records#

2 records   76ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s mailforward21.cloudns.net 109.201.133.110
2a00:1768:1001:9::23		 mailforward21.cloudns.net
mailforward21.cloudns.net		 AS43350 NForce Entertainment B.V.
AS43350 NForce Entertainment B.V.
20 3600s mailforward22.cloudns.net 185.206.180.83
2a0b:1640:1:1:1:1:325:241		 mf22-de.cloudmails.net
mf22-de.cloudmails.net		 AS205787 Public Cloud Ltd.
AS205787 Public Cloud Ltd.

🔷 AAAA Records (IPv6)#

1 records   69ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2a00:4820:3f60:f00:9b03:9cf8:73f2:a355 3600s mx.szn.dk AS24800 BornFiber Service Provider ApS 2a00:4820:0:0:0:0:0:0/32 🇩🇰 Denmark Rønne

🔐 HTTPS Records#

1 records   85ms
PriorityTargetSvcParams
10 service . alpn="h3,h2"

📝 TXT Records#

2 records   405ms
TXT Record
Port 53
v=spf1 include:_spf.szn.dk -all

✉️ SPF#

PolicyRecord (port53.dk)
-all (hard fail) v=spf1 include:_spf.szn.dk -all

📨 DMARC#

PolicyRecord (_dmarc.port53.dk)
p=reject v=DMARC1; p=reject; rua=mailto:dmarc@port53.dk

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

3 records   91ms
FlagsTagValue
0 iodef mailto:klaus@seistrup.dk
0 issue letsencrypt.org
0 issue zerossl.com

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-19 16:35:12
www185.107.169.23 2a00:4820:3f60:f00:a7bd:a4c:8f39:12aa (AS24800) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceNSEC3 · 0 iterations · no salt · opt-out RFC 9276 ✓
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

1 records   2665ms
Service / OwnerTypeCert association
HTTPS _443._tcp.port53.dk DANE-EE · SPKI · SHA-256 FC0C32BCA3D97FB2B22C3AECD6B878E4…

🔐 DNSSEC#

275ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

0ms
FieldValue
Serial2026082002
Primary NS (MNAME)ns21.cloudns.net
Responsible (RNAME)kas@port53.dk
Refresh7200s
Retry1800s
Expire1209600s
Minimum (neg-cache TTL)3600s

📋 Registration#

WHOIS fetched 2026-10-19 17:03:43
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2016-11-02
Expires2027-08-31 (315d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
91ms
A
73ms
MX
76ms
AAAA
69ms
TXT
405ms
CAA
91ms
HTTPS
85ms
TLSA
2665ms
SOA
0ms
MTA-STS
148ms
DNSSEC
275ms
SRV
210ms
Total
10502ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-19 16:35:12 7937ms 7 NS 1 A 2 MX 🔒 Secure
2026-10-03 17:55:59 980ms 7 NS 1 A 2 MX 🔒 Secure
2026-09-29 17:58:51 6106ms 7 NS 1 A 2 MX 🔒 Secure
2026-09-13 08:53:41 8736ms 7 NS 1 A 2 MX 🔒 Secure
2026-09-03 21:00:19 9862ms 7 NS 1 A 2 MX 🔒 Secure
2026-09-03 13:07:36 6411ms 7 NS 1 A 2 MX 🔒 Secure
2026-08-20 13:18:47 shown 10502ms 7 NS 1 A 2 MX 🔒 Secure
2026-08-01 22:55:27 17713ms 7 NS 1 A 2 MX 🔒 Secure
2026-07-14 21:56:19 15889ms 7 NS 1 A 2 MX 🔒 Secure
2026-06-22 05:06:26 2111ms 7 NS 1 A 2 MX 🔒 Secure
2026-06-17 13:11:00 1737ms 7 NS 1 A 2 MX 🔒 Secure
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