cstel.dk DNS records

🖥️ Nameservers2 records 123ms

Nameserver	IP addresses	PTR	ASN / ISP
jihoon.ns.cloudflare.com	108.162.195.233 162.159.44.233 172.64.35.233 2606:4700:58::a29f:2ce9 2803:f800:50::6ca2:c3e9 2a06:98c1:50::ac40:23e9	jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
martha.ns.cloudflare.com	108.162.194.142 162.159.38.142 172.64.34.142 2606:4700:50::a29f:268e 2803:f800:50::6ca2:c28e 2a06:98c1:50::ac40:228e	martha.ns.cloudflare.com martha.ns.cloudflare.com martha.ns.cloudflare.com martha.ns.cloudflare.com martha.ns.cloudflare.com martha.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 153ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
188.114.96.3	300s	—	AS13335	Cloudflare, Inc.	188.114.96.0/22	—	—
188.114.97.3	300s	—	AS13335	Cloudflare, Inc.	188.114.96.0/22	—	—

📧 MX Records1 records 152ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	. Null MX — domain accepts no email (RFC 7505)

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	ae-east.cstel.dk → 213.83.187.140
🔶 Autoconfig	ae-east.cstel.dk → 213.83.187.140

🔷 AAAA Records (IPv6)2 records 145ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a06:98c1:3120::3	300s	—	AS13335	Cloudflare, Inc.	2a06:98c1:3120:0:0:0:0:0/46	—	—
2a06:98c1:3121::3	300s	—	AS13335	Cloudflare, Inc.	2a06:98c1:3120:0:0:0:0:0/46	—	—

🔐 HTTPS Records1 records 218ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=188.114.96.3,188.114.97.3 ech=AEX+DQBBSwAgACBSI8SIWpPJZ+nSdwGLH9F2pFQjr+CzXuXIqbfFP/QdWAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::3,2a06:98c1:3121::3

📝 TXT Records1 records 439ms

TXT Record
v=spf1 -all

✉️ SPF

Policy	Record (cstel.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC

Policy	Record (_dmarc.cstel.dk)
p=reject	v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;

📬 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.cstel.dk	ae-east.cstel.dk

🔗 TLSA / DANE

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

🔐 DNSSEC306ms

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	2412505731
Primary NS (MNAME)	jihoon.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

123ms

A

153ms

MX

152ms

AAAA

145ms

TXT

439ms

CAA

168ms

HTTPS

218ms

TLSA

146ms

SOA

0ms

MTA-STS

217ms

DNSSEC

306ms

SRV

207ms

Total

3792ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-19 04:34:24	3792ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-01 21:19:24	726ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-20 14:05:45	892ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-19 04:53:41	2119ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-16 16:42:24	968ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-14 19:24:17	916ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-03 11:42:03	1250ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-26 04:12:08	1147ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-19 22:35:31	2950ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-16 23:06:28	481ms	2 NS 2 A 0 MX	🔓 Insecure	View