sudoku-online.dk DNS records

🖥️ Nameservers2 records 101ms

Nameserver	IP addresses	PTR	ASN / ISP
kate.ns.cloudflare.com	108.162.192.124 172.64.32.124 173.245.58.124 2606:4700:50::adf5:3a7c 2803:f800:50::6ca2:c07c 2a06:98c1:50::ac40:207c	kate.ns.cloudflare.com kate.ns.cloudflare.com kate.ns.cloudflare.com kate.ns.cloudflare.com kate.ns.cloudflare.com kate.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
matt.ns.cloudflare.com	108.162.193.131 172.64.33.131 173.245.59.131 2606:4700:58::adf5:3b83 2803:f800:50::6ca2:c183 2a06:98c1:50::ac40:2183	matt.ns.cloudflare.com matt.ns.cloudflare.com matt.ns.cloudflare.com matt.ns.cloudflare.com matt.ns.cloudflare.com matt.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 122ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.28.150	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.170.226	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)2 records 227ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:1c96	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3031::ac43:aae2	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 127ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.28.150,172.67.170.226 ech=AEX+DQBB2wAgACCHuaNsHccQwjigXz1469aCCmviTucGiitjk+hEteeIBAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:1c96,2606:4700:3031::ac43:aae2

📝 TXT Records

📝

No TXT records found

✉️ SPF

✗ No SPF record — mail spoofing not restricted

📨 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)

🔐 DNSSEC231ms

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	2410965596
Primary NS (MNAME)	kate.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

101ms

A

122ms

MX

112ms

AAAA

227ms

TXT

277ms

CAA

221ms

HTTPS

127ms

TLSA

250ms

SOA

0ms

MTA-STS

114ms

DNSSEC

231ms

SRV

214ms

Total

1382ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-08 03:09:26	1382ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-07-27 12:10:00	17444ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-25 07:02:31	791ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-20 02:43:32	433ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-17 13:05:58	595ms	2 NS 2 A 0 MX	🔓 Insecure	View