u2b.dk DNS records

🖥️ Nameservers2 records 36ms

Nameserver	IP addresses	PTR	ASN / ISP
clayton.ns.cloudflare.com	108.162.195.226 162.159.44.226 172.64.35.226 2606:4700:58::a29f:2ce2 2803:f800:50::6ca2:c3e2 2a06:98c1:50::ac40:23e2	clayton.ns.cloudflare.com clayton.ns.cloudflare.com clayton.ns.cloudflare.com clayton.ns.cloudflare.com clayton.ns.cloudflare.com clayton.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
gina.ns.cloudflare.com	108.162.192.117 172.64.32.117 173.245.58.117 2606:4700:50::adf5:3a75 2803:f800:50::6ca2:c075 2a06:98c1:50::ac40:2075	gina.ns.cloudflare.com gina.ns.cloudflare.com gina.ns.cloudflare.com gina.ns.cloudflare.com gina.ns.cloudflare.com gina.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 31ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.68.27	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.185.121	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records1 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	u2b-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::c 2a01:111:f403:ca09::a 2a01:111:f403:ca48::a 52.101.209.153 52.101.68.27 52.101.73.16 52.101.73.6	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am7pr02cu00202.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-cpjpr04cu00101.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24
🔶 Autoconfig	172.67.185.121

🔷 AAAA Records (IPv6)2 records 33ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:b979	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:441b	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 28ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.68.27,172.67.185.121 ech=AEX+DQBBRwAgACDPbTCWcV+McLVVNspbOGWAbzzTs7tbSKf0Ltkd1UPwPAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:b979,2606:4700:3037::6815:441b

🔌 SRV Records1 records 81ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records3 records 156ms

TXT Record
google-site-verification=FYoYrUBvwAYiEgAS2WvDWSWayO0PMtDFxhl_3xQGAHs
MS=ms26582490
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (u2b.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC

Policy	Record (_dmarc.u2b.dk)
p=quarantine	v=DMARC1; p=quarantine; 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
TXT	_acme-challenge.u2b.dk	ZWkXNqIsxoBr4_cla5BNB8unue5cXeSJeL90A-w-ubw

🔗 TLSA / DANE

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

🔐 DNSSEC103ms

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	2413676823
Primary NS (MNAME)	clayton.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

31ms

MX

39ms

AAAA

33ms

TXT

156ms

CAA

38ms

HTTPS

28ms

TLSA

400ms

SOA

0ms

MTA-STS

46ms

DNSSEC

103ms

SRV

81ms

Total

1003ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-01 02:53:40	1003ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-27 15:36:23	1096ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-22 11:50:09	7917ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-20 09:04:25	2496ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-10 07:11:24	8443ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-06 07:27:47	1506ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-29 11:44:23	4544ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-24 13:03:04	10328ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-18 02:16:18	3077ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-12 13:28:14	1954ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-09 22:59:12	1438ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-05 01:34:21	1550ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-05 01:33:06	1981ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-03 18:35:49	2331ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-01 20:57:09	2065ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-27 03:21:29	2202ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-21 03:24:22	1317ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-18 05:28:52	1323ms	2 NS 2 A 1 MX	🔓 Insecure	View