post42.dk DNS records

🖥️ Nameservers4 records 61ms

Nameserver	IP addresses	PTR	ASN / ISP
ns-11.awsdns-01.com	205.251.192.11 2600:9000:5300:b00::1	ns-11.awsdns-01.com ns-11.awsdns-01.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-1186.awsdns-20.org	205.251.196.162 2600:9000:5304:a200::1	ns-1186.awsdns-20.org ns-1186.awsdns-20.org	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-1853.awsdns-39.co.uk	205.251.199.61 2600:9000:5307:3d00::1	ns-1853.awsdns-39.co.uk ns-1853.awsdns-39.co.uk	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-701.awsdns-23.net	205.251.194.189 2600:9000:5302:bd00::1	ns-701.awsdns-23.net ns-701.awsdns-23.net	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

🌍 A Records

🌍

No A records found

📧 MX Records2 records 82ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mail.protonmail.ch	176.119.200.128 185.205.70.128 185.70.42.128	mail.protonmail.ch mail.protonmail.ch mail.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG
20	3600s	mailsec.protonmail.ch	176.119.200.129 185.205.70.129 185.70.42.129	mailsec.protonmail.ch mailsec.protonmail.ch mailsec.protonmail.ch	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 Records2 records 267ms

TXT Record
protonmail-verification=9622502b8643c211bb56f874dc8fb824d6c96409
v=spf1 include:_spf.protonmail.ch include:outlook.com -all

✉️ SPF

Policy	Record (post42.dk)
-all (hard fail)	v=spf1 include:_spf.protonmail.ch include:outlook.com -all

📨 DMARC

Policy	Record (_dmarc.post42.dk)
p=quarantine	v=DMARC1; p=quarantine

📬 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

🔗 TLSA / DANE4 records 53ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…

🔐 DNSSEC134ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA0ms

Field	Value
Serial	1
Primary NS (MNAME)	ns-1186.awsdns-20.org
Responsible (RNAME)	awsdns-hostmaster@amazon.com
Refresh	7200s
Retry	900s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

61ms

A

92ms

MX

82ms

AAAA

103ms

TXT

267ms

CAA

63ms

HTTPS

86ms

TLSA

53ms

SOA

0ms

MTA-STS

107ms

DNSSEC

134ms

SRV

165ms

Total

857ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 09:52:19	857ms	4 NS 0 A 2 MX	🔓 Insecure	View
2026-06-17 20:25:50	1032ms	4 NS 0 A 3 MX	🔓 Insecure	View