4tw.dk

📜 Historical scan 2026-08-27 23:11:09 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

4tw.dk is a .dk domain served by 2 nameservers (heidi.ns.cloudflare.com, nick.ns.cloudflare.com). It was registered on 26 May 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.161.40.235 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mx1.simplelogin.co, mx2.simplelogin.co. 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 40ms

Nameserver	IP addresses	PTR	ASN / ISP
heidi.ns.cloudflare.com	108.162.194.236 162.159.38.236 172.64.34.236 2606:4700:50::a29f:26ec 2803:f800:50::6ca2:c2ec 2a06:98c1:50::ac40:22ec	heidi.ns.cloudflare.com heidi.ns.cloudflare.com heidi.ns.cloudflare.com heidi.ns.cloudflare.com heidi.ns.cloudflare.com heidi.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
nick.ns.cloudflare.com	108.162.193.213 172.64.33.213 173.245.59.213 2606:4700:58::adf5:3bd5 2803:f800:50::6ca2:c1d5 2a06:98c1:50::ac40:21d5	nick.ns.cloudflare.com nick.ns.cloudflare.com nick.ns.cloudflare.com nick.ns.cloudflare.com nick.ns.cloudflare.com nick.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 55ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.161.40.235	60s	93-161-40-235-static.dk.customer.tdc.net	AS3292	TDC Holding A/S	93.160.0.0/14	🇩🇰 Denmark	Hvidovre

📧 MX Records#

2 records 63ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx1.simplelogin.co	176.119.200.136 176.119.200.136 185.205.70.136 185.205.70.136	mx1.simplelogin.co mx2.simplelogin.co mx2.simplelogin.co mx1.simplelogin.co	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG
20	300s	mx2.simplelogin.co	176.119.200.136 176.119.200.136 185.205.70.136 185.205.70.136	mx1.simplelogin.co mx2.simplelogin.co mx2.simplelogin.co mx1.simplelogin.co	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

4 records 197ms

TXT Record
apple-domain-verification=K1dGkm64cX4FvDb4
protonmail-verification=80a49124321de7c19d8c72b2647b7c9b33cecaea
sl-verification=pvyexyvyruegtpdkgrsgxgbyfnwrvf
v=spf1 include:simplelogin.co ip4:93.161.40.235 include:_spf.protonmail.ch ~all

✉️ SPF#

Policy	Record (4tw.dk)
~all (soft fail)	v=spf1 include:simplelogin.co ip4:93.161.40.235 include:_spf.protonmail.ch ~all

📨 DMARC#

Policy	Record (_dmarc.4tw.dk)
p=quarantine	v=DMARC1; p=quarantine; pct=100; adkim=s; aspf=s

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

11 records 39ms

Flags	Tag	Value
0	iodef	letsencrypt.org
0	issue	comodoca.com
0	issue	digicert.com; cansignhttpexchanges=yes
0	issue	letsencrypt.org
0	issue	pki.goog; cansignhttpexchanges=yes
0	issue	ssl.com
0	issuewild	comodoca.com
0	issuewild	digicert.com; cansignhttpexchanges=yes
0	issuewild	letsencrypt.org
0	issuewild	pki.goog; cansignhttpexchanges=yes
0	issuewild	ssl.com

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-12 06:51:11

www	NXDOMAIN
www vs bare domain	www does not resolve 4tw.dk: 93.161.40.235 (AS3292) www.4tw.dk: no address (all like this)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
dkim	dkim._domainkey.simplelogin.co	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.4tw.dk	Kg_21j4M7LgRt_Wl9Jus-I0UkJQL04tBUAQsi-uk9Sg
TXT	_acme-challenge.4tw.dk	PQM82rLQqcynlscmXYwr8XtVJR5MLhhg_I7_8h3FmOY

🔗 TLSA / DANE#

6 records 73ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.simplelogin.co	DANE-TA · SPKI · SHA-256	8D02536C887482BC34FF54E41D2BA659…
SMTP _25._tcp.mx1.simplelogin.co	DANE-TA · SPKI · SHA-256	E5545E211347241891C554A03934CDE9…
SMTP _25._tcp.mx1.simplelogin.co	DANE-EE · SPKI · SHA-256	6B56DC55058100C47BEF4BB8020D2A24…
SMTP _25._tcp.mx2.simplelogin.co	DANE-TA · SPKI · SHA-256	8D02536C887482BC34FF54E41D2BA659…
SMTP _25._tcp.mx2.simplelogin.co	DANE-TA · SPKI · SHA-256	E5545E211347241891C554A03934CDE9…
SMTP _25._tcp.mx2.simplelogin.co	DANE-EE · SPKI · SHA-256	6B56DC55058100C47BEF4BB8020D2A24…

🔐 DNSSEC#

93ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2413269997
Primary NS (MNAME)	heidi.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-13 15:22:52

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2009-05-26
Expires	2027-07-31 (287d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

40ms

55ms

63ms

AAAA

53ms

TXT

197ms

CAA

39ms

HTTPS

133ms

TLSA

73ms

SOA

0ms

MTA-STS

69ms

DNSSEC

93ms

SRV

74ms

Total

1232ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 06:51:10	2982ms	2 NS 1 A 2 MX	🔓 Insecure
2026-10-10 05:28:06	3451ms	2 NS 1 A 2 MX	🔓 Insecure
2026-09-26 19:42:42	9907ms	2 NS 1 A 2 MX	🔓 Insecure
2026-09-24 03:52:45	1387ms	2 NS 1 A 2 MX	🔓 Insecure
2026-09-19 13:14:10	1865ms	2 NS 1 A 2 MX	🔓 Insecure
2026-09-17 17:04:45	1207ms	2 NS 1 A 2 MX	🔓 Insecure
2026-09-03 14:23:52	3204ms	2 NS 1 A 2 MX	🔓 Insecure
2026-08-29 00:44:02	1434ms	2 NS 1 A 2 MX	🔓 Insecure
2026-08-27 23:11:09 shown	1232ms	2 NS 1 A 2 MX	🔓 Insecure
2026-08-27 03:24:23	10481ms	2 NS 1 A 2 MX	🔓 Insecure
2026-08-18 20:24:56	5003ms	2 NS 1 A 2 MX	🔓 Insecure
2026-08-11 17:16:12	4405ms	2 NS 1 A 2 MX	🔓 Insecure
2026-07-22 20:48:37	1362ms	2 NS 1 A 2 MX	🔓 Insecure
2026-07-19 08:58:07	1892ms	2 NS 1 A 2 MX	🔓 Insecure
2026-07-16 15:17:42	1212ms	2 NS 1 A 2 MX	🔓 Insecure
2026-06-27 07:39:26	1331ms	2 NS 1 A 2 MX	🔓 Insecure
2026-06-24 21:13:33	1372ms	2 NS 1 A 2 MX	🔓 Insecure
2026-06-23 04:57:47	972ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 05:40:07	1907ms	2 NS 1 A 2 MX	🔓 Insecure
2026-06-16 12:45:14	1471ms	2 NS 1 A 2 MX	🔓 Insecure