4tw.dk DNS records

🖥️ Nameservers2 records 86ms

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 Records1 records 137ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.161.40.235	120s	93-161-40-235-static.dk.customer.tdc.net	AS3292	TDC Holding A/S	93.160.0.0/14	🇩🇰 Denmark	Hvidovre

📧 MX Records2 records 71ms

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	mx2.simplelogin.co mx1.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	mx2.simplelogin.co mx1.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 Records4 records 278ms

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 Records11 records 97ms

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

🔗 TLSA / DANE6 records 171ms

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

🔐 DNSSEC269ms

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

🏷️ SOA0ms

Field	Value
Serial	2413401400
Primary NS (MNAME)	heidi.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

86ms

A

137ms

MX

71ms

AAAA

117ms

TXT

278ms

CAA

97ms

HTTPS

91ms

TLSA

171ms

SOA

0ms

MTA-STS

141ms

DNSSEC

269ms

SRV

121ms

Total

1434ms

🕐 Scan History

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