2840.dk

📜 Historical scan 2026-08-27 11:50:36 · ← 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 46ms

Nameserver	IP addresses	PTR	ASN / ISP
ashley.ns.cloudflare.com	108.162.192.71 172.64.32.71 173.245.58.71 2606:4700:50::adf5:3a47 2803:f800:50::6ca2:c047 2a06:98c1:50::ac40:2047	ashley.ns.cloudflare.com ashley.ns.cloudflare.com ashley.ns.cloudflare.com ashley.ns.cloudflare.com ashley.ns.cloudflare.com ashley.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
clark.ns.cloudflare.com	108.162.193.87 172.64.33.87 173.245.59.87 2606:4700:58::adf5:3b57 2803:f800:50::6ca2:c157 2a06:98c1:50::ac40:2157	clark.ns.cloudflare.com clark.ns.cloudflare.com clark.ns.cloudflare.com clark.ns.cloudflare.com clark.ns.cloudflare.com clark.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 61ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.103.135.253	300s	5.103.135.253.static.fibianet.dk	AS44869	FIBIA P/S	5.103.0.0/16	🇩🇰 Denmark	Frederiksberg

📧 MX Records#

1 records 40ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	2840-dk.w-v1.mx.microsoft	2a01:111:f403:ca04::10 2a01:111:f403:ca04::2 2a01:111:f403:ca09::6 2a01:111:f403:ca48::a 52.101.68.36 52.101.73.11 52.101.73.12 52.101.73.30	mail-dbapr03cu00100.inbound.protection.outlook.com mail-du2pr03cu00102.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 112ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 220ms

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#

4 records 80ms

Service / Owner	Type	Cert association
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	54883CC5F1849331E6BF5002C3129D20…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	EA7A25255D111FC3CE4CB8FABE3ADF9C…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	803F7447CC75B208DBCA042346F5D8DF…
SMTP _25._tcp.2840-dk.w-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	C1AD7778796D20BCA65C889A26550211…

🔐 DNSSEC#

103ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2412977684
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#

46ms

61ms

40ms

AAAA

64ms

TXT

220ms

CAA

60ms

HTTPS

70ms

TLSA

80ms

SOA

0ms

MTA-STS

101ms

DNSSEC

103ms

SRV

112ms

Total

750ms

🕐 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 shown	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	799ms	2 NS 1 A 1 MX	🔒 Secure