u3.dk DNS records

🖥️ Nameservers2 records 51ms

Nameserver	IP addresses	PTR	ASN / ISP
katelyn.ns.cloudflare.com	108.162.194.235 162.159.38.235 172.64.34.235 2606:4700:50::a29f:26eb 2803:f800:50::6ca2:c2eb 2a06:98c1:50::ac40:22eb	katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
yadiel.ns.cloudflare.com	108.162.195.4 162.159.44.4 172.64.35.4 2606:4700:58::a29f:2c04 2803:f800:50::6ca2:c304 2a06:98c1:50::ac40:2304	yadiel.ns.cloudflare.com yadiel.ns.cloudflare.com yadiel.ns.cloudflare.com yadiel.ns.cloudflare.com yadiel.ns.cloudflare.com yadiel.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records1 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
86.52.56.230	300s	86-52-56-230.norlyscustomer.net	AS39642	Sinal A/S	86.52.0.0/16	🇩🇰 Denmark	Silkeborg

📧 MX Records1 records 47ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	ispc3.bjasoe.net	86.52.56.230	86-52-56-230.norlyscustomer.net	AS39642 Sinal A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	172.67.152.74
🔶 Autoconfig	104.21.32.134

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 222ms

TXT Record
v=spf1 ip4:86.52.56.230 ip4:46.23.90.161 ip6:2a03:6000:6f63:622::161 -all

✉️ SPF

Policy	Record (u3.dk)
-all (hard fail)	v=spf1 ip4:86.52.56.230 ip4:46.23.90.161 ip6:2a03:6000:6f63:622::161 -all

📨 DMARC

Policy	Record (_dmarc.u3.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:c26cfb67b61a4335aa4cb7dd54cac5cb@dmarc-reports.cloudflare.net,mailto:dmarc-report@u3.dk

📬 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)

🔐 DNSSEC86ms

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	2411593774
Primary NS (MNAME)	katelyn.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

51ms

A

44ms

MX

47ms

AAAA

41ms

TXT

222ms

CAA

46ms

HTTPS

62ms

TLSA

244ms

SOA

0ms

MTA-STS

67ms

DNSSEC

86ms

SRV

73ms

Total

1190ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-09 20:01:39	1190ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-07-08 13:59:59	902ms	2 NS 1 A 1 MX	❓ Unknown	View
2026-07-02 11:55:37	1698ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-26 02:59:30	2042ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-18 05:14:44	732ms	2 NS 1 A 1 MX	🔓 Insecure	View