postkortcentral.dk DNS records

🖥️ Nameservers2 records 369ms

Nameserver	IP addresses	PTR	ASN / ISP
irma.ns.cloudflare.com	108.162.192.166 172.64.32.166 173.245.58.166 2606:4700:50::adf5:3aa6 2803:f800:50::6ca2:c0a6 2a06:98c1:50::ac40:20a6	irma.ns.cloudflare.com irma.ns.cloudflare.com irma.ns.cloudflare.com irma.ns.cloudflare.com irma.ns.cloudflare.com irma.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
thomas.ns.cloudflare.com	108.162.193.238 172.64.33.238 173.245.59.238 2606:4700:58::adf5:3bee 2803:f800:50::6ca2:c1ee 2a06:98c1:50::ac40:21ee	thomas.ns.cloudflare.com thomas.ns.cloudflare.com thomas.ns.cloudflare.com thomas.ns.cloudflare.com thomas.ns.cloudflare.com thomas.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 374ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.95.211	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.148.158	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records5 records 367ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	142.251.127.26 2a00:1450:4001:c21::1b	lcfrai-in-f26.1e100.net lcfrai-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	142.250.147.27 2a00:1450:4025:c01::1b	rd-in-f27.1e100.net rd-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	172.253.152.27 2a00:1450:4010:c22::1a	yulpptr-in-f27.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	192.178.211.27 2404:6800:4000:1025::1b	lcbomp-in-f27.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1b	lcdels-in-f26.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	postkortcentral.dk → 91.102.91.50
🔶 Autoconfig	postkortcentral.dk → 91.102.91.50

🔷 AAAA Records (IPv6)2 records 329ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::ac43:949e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:5fd3	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 382ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.95.211,172.67.148.158 ech=AEX+DQBBnQAgACCyEfOJlUjdlQMdFW3mx75ppDEOAdL4yG+Qaof2D1mjFQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:949e,2606:4700:3036::6815:5fd3

📝 TXT Records3 records 1028ms

TXT Record
ca3-55638e11ca974048b615390e5a63476e
google-site-verification=inwd8wQkuFzvhzf9VLFwrjyBLwodO48t94RI090exZw
v=spf1 include:_spf.google.com -all

✉️ SPF

Policy	Record (postkortcentral.dk)
-all (hard fail)	v=spf1 include:_spf.google.com -all

📨 DMARC

Policy	Record (_dmarc.postkortcentral.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc-agg@12net.dk; ruf=mailto:dmarc-afrf@12net.dk; fo=1;

📬 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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.postkortcentral.dk	postkortcentral.dk
TXT	postkortcentral.dk	ca3-55638e11ca974048b615390e5a63476e

🔗 TLSA / DANE

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC595ms

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	2412694072
Primary NS (MNAME)	irma.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

369ms

A

374ms

MX

367ms

AAAA

329ms

TXT

1028ms

CAA

308ms

HTTPS

382ms

TLSA

565ms

SOA

0ms

MTA-STS

428ms

DNSSEC

595ms

SRV

410ms

Total

11413ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-21 01:01:51	11413ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-08-18 21:33:04	5881ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-07-23 06:53:05	9797ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-07-01 12:35:09	1039ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-06-24 00:14:41	1100ms	2 NS 2 A 5 MX	❓ Unknown	View
2026-06-23 13:34:02	964ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-18 05:22:18	985ms	2 NS 2 A 5 MX	🔓 Insecure	View