rexpc.dk DNS records

🖥️ Nameservers2 records 59ms

Nameserver	IP addresses	PTR	ASN / ISP
apollo.ns.cloudflare.com	108.162.193.66 172.64.33.66 173.245.59.66 2606:4700:58::adf5:3b42 2803:f800:50::6ca2:c142 2a06:98c1:50::ac40:2142	apollo.ns.cloudflare.com apollo.ns.cloudflare.com apollo.ns.cloudflare.com apollo.ns.cloudflare.com apollo.ns.cloudflare.com apollo.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
pat.ns.cloudflare.com	108.162.192.139 172.64.32.139 173.245.58.139 2606:4700:50::adf5:3a8b 2803:f800:50::6ca2:c08b 2a06:98c1:50::ac40:208b	pat.ns.cloudflare.com pat.ns.cloudflare.com pat.ns.cloudflare.com pat.ns.cloudflare.com pat.ns.cloudflare.com pat.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 59ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.53.188	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.216.44	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records5 records 45ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	aspmx.l.google.com	142.251.1.27 2a00:1450:4010:c0f::1a 2a00:1450:4010:c0f::1a	lb-in-f27.1e100.net lt-in-x1a.1e100.net lt-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	300s	alt1.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1b	lcdels-in-f27.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt2.aspmx.l.google.com	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1a	mad01s14-in-f27.1e100.net yukulwh-in-f27.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	300s	alt3.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	300s	alt4.aspmx.l.google.com	108.177.125.26 2404:6800:4008:c01::1b	tp-in-f26.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	104.21.53.188
🔶 Autoconfig	172.67.216.44

🔷 AAAA Records (IPv6)2 records 63ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3037::6815:35bc	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:d82c	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 57ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.53.188,172.67.216.44 ech=AEX+DQBBywAgACC+r27rvQ2ITTeAhRa19al8UU/bGo3esajfWq8tG/qeIAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3037::6815:35bc,2606:4700:3037::ac43:d82c

📝 TXT Records2 records 240ms

TXT Record
v=spf1 include:_spf.google.com include:spf.simply.com -all
v=spf1 include:spf.simply.com -all

✉️ SPF

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

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

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 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 / DANE

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

🔐 DNSSEC143ms

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	2410571651
Primary NS (MNAME)	apollo.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

59ms

A

59ms

MX

45ms

AAAA

63ms

TXT

240ms

CAA

70ms

HTTPS

57ms

TLSA

117ms

SOA

0ms

MTA-STS

70ms

DNSSEC

143ms

SRV

84ms

Total

1054ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 11:27:16	1054ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-07-27 03:07:45	1432ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-07-26 02:30:06	1593ms	2 NS 2 A 5 MX	🔓 Insecure	View
2026-07-20 15:22:31	1214ms	4 NS 1 A 5 MX	🔒 Secure	View
2026-06-25 06:50:57	1847ms	4 NS 1 A 5 MX	🔒 Secure	View
2026-06-18 05:38:31	856ms	4 NS 1 A 5 MX	🔒 Secure	View