opt.dk DNS records

🖥️ Nameservers2 records 36ms

Nameserver	IP addresses	PTR	ASN / ISP
nico.ns.cloudflare.com	108.162.195.147 162.159.44.147 172.64.35.147 2606:4700:58::a29f:2c93 2803:f800:50::6ca2:c393 2a06:98c1:50::ac40:2393	nico.ns.cloudflare.com nico.ns.cloudflare.com nico.ns.cloudflare.com nico.ns.cloudflare.com nico.ns.cloudflare.com nico.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
stephane.ns.cloudflare.com	108.162.194.112 162.159.38.112 172.64.34.112 2606:4700:50::a29f:2670 2803:f800:50::6ca2:c270 2a06:98c1:50::ac40:2270	stephane.ns.cloudflare.com stephane.ns.cloudflare.com stephane.ns.cloudflare.com stephane.ns.cloudflare.com stephane.ns.cloudflare.com stephane.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 39ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.21.138	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.199.24	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records1 records 52ms

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

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	104.21.21.138
🔶 Autoconfig	172.67.199.24

🔷 AAAA Records (IPv6)2 records 50ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:158a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::ac43:c718	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 65ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.21.138,172.67.199.24 ech=AEX+DQBBagAgACBUUNKbhIpdQ3Gy7DXSzIViCJH6Mfv2EewD2V/p2pW+JwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:158a,2606:4700:3034::ac43:c718

📝 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)

🔐 DNSSEC173ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2409173271
Primary NS (MNAME)	nico.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

36ms

A

39ms

MX

52ms

AAAA

50ms

TXT

196ms

CAA

50ms

HTTPS

65ms

TLSA

74ms

SOA

0ms

MTA-STS

8048ms

DNSSEC

173ms

SRV

100ms

Total

8735ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-21 08:28:02	1722ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-01 11:27:05	959ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-27 13:09:12	9383ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-11 05:43:49	8735ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-03 19:51:10	1322ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-02 07:20:51	1988ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-18 03:52:28	2684ms	2 NS 2 A 0 MX	🔓 Insecure	View