2840.dk

📜 Historical scan 2026-06-16 12:38:55 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

2840.dk is a .dk domain served by 2 nameservers (ashley.ns.cloudflare.com, clark.ns.cloudflare.com). It was registered on 10 September 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.103.135.253 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by 2840-dk.w-v1.mx.microsoft. The zone is DNSSEC-signed and validates, 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 35ms

Nameserver	IP addresses	PTR	ASN / ISP
ashley.ns.cloudflare.com	—	—	—
clark.ns.cloudflare.com	—	—	—

🌍 A Records#

1 records 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.103.135.253	—	5.103.135.253.static.fibianet.dk	AS44869	FIBIA P/S	5.103.0.0/16	🇩🇰 Denmark	—

📧 MX Records#

1 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	2840-dk.w-v1.mx.microsoft	52.101.68.39 52.101.73.16 52.101.73.6 52.101.73.8	mail-db7pr03cu00607.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com mail-am0pr04cu00500.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 149ms

TXT Record
MS=66AEE27A18607067FE2ED46023BDA28CC1BC31C7
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (2840.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.2840.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:d54afd0374ab453f9298290c4f7ad636@dmarc-reports.cloudflare.net

📬 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 2026-10-11 13:20:33

www	104.21.86.97 172.67.217.108 2606:4700:3030::6815:5661 2606:4700:3034::ac43:d96c (AS13335) (address records, no CNAME)
www vs bare domain	Different networks 2840.dk: 5.103.135.253 (AS44869) www.2840.dk: 104.21.86.97 172.67.217.108 2606:4700:3030::6815:5661 2606:4700:3034::ac43:d96c (AS13335) (all like this)
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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

6 records 98ms

Service / Owner	Type	Cert association
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	C495D9E40F7E625BE22F83CC64305182…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	5F88694615E4C61686E106B84C3338C6…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	A6C267923B26A4A9617EDA73D8DB4FBC…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	133086C7B822371A4A3304F1661A7880…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	38D895F5105BC2545822C17A2444F4B0…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	6EBFF927297A5B3AAF5EAE672252C36A…

🔐 DNSSEC#

102ms

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

🏷️ SOA#

33ms

Field	Value
Serial	2406756880
Primary NS (MNAME)	ashley.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-12 12:00:50

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1999-09-10
Expires	2031-05-31 (1687d)

🔗 Same registrant#

4 domains

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
claraskovgaard.dk	Punktum dk A/S (direct)
courthouse.dk	Punktum dk A/S (direct)
fyh.dk	Punktum dk A/S (direct)
kolbech.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

35ms

36ms

32ms

AAAA

33ms

TXT

149ms

CAA

29ms

HTTPS

36ms

TLSA

98ms

SOA

33ms

MTA-STS

50ms

DNSSEC

102ms

SRV

0ms

Total

799ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-11 13:20:33	511ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-09 09:41:41	1428ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 05:57:42	578ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-28 01:43:34	781ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 00:30:06	809ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-19 13:33:27	1692ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 11:50:36	750ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-24 14:47:13	4101ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-02 19:38:57	1430ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-25 08:32:34	1978ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-09 05:32:13	2371ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-30 20:21:41	1013ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:38:55 shown	799ms	2 NS 1 A 1 MX	🔒 Secure