a1b2.dk DNS records

🖥️ Nameservers2 records 28ms

Nameserver	IP addresses	PTR	ASN / ISP
duke.ns.cloudflare.com	108.162.193.110 172.64.33.110 173.245.59.110 2606:4700:58::adf5:3b6e 2803:f800:50::6ca2:c16e 2a06:98c1:50::ac40:216e	duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
nina.ns.cloudflare.com	108.162.192.136 172.64.32.136 173.245.58.136 2606:4700:50::adf5:3a88 2803:f800:50::6ca2:c088 2a06:98c1:50::ac40:2088	nina.ns.cloudflare.com nina.ns.cloudflare.com nina.ns.cloudflare.com nina.ns.cloudflare.com nina.ns.cloudflare.com nina.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 23ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.65.202	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.192.52	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records2 records 26ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	300s	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)2 records 31ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::ac43:c034	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:41ca	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 23ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.65.202,172.67.192.52 ech=AEX+DQBBwQAgACAlXGmsP7yjuE91KEMvn0SqbPVQTsh3mM/Qh4AN9hyEGAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:c034,2606:4700:3035::6815:41ca

📝 TXT Records1 records 155ms

TXT Record
v=spf1 include:spf.onlinemail.io -all

✉️ SPF

Policy	Record (a1b2.dk)
-all (hard fail)	v=spf1 include:spf.onlinemail.io -all

📨 DMARC

Policy	Record (_dmarc.a1b2.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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)

🔐 DNSSEC91ms

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	2413489604
Primary NS (MNAME)	duke.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

28ms

A

23ms

MX

26ms

AAAA

31ms

TXT

155ms

CAA

29ms

HTTPS

23ms

TLSA

48ms

SOA

0ms

MTA-STS

45ms

DNSSEC

91ms

SRV

220ms

Total

823ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 17:15:13	823ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-28 07:16:08	817ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-27 23:40:35	625ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-26 20:00:40	706ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-25 15:21:04	2121ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-29 14:43:08	922ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-26 23:31:06	379ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-06-23 08:26:47	1151ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-22 16:58:16	1166ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-19 12:01:51	550ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-06-16 12:52:03	1286ms	2 NS 1 A 0 MX	🔒 Secure	View