esbu.dk DNS records

🖥️ Nameservers2 records 25ms

Nameserver	IP addresses	PTR	ASN / ISP
brit.ns.cloudflare.com	108.162.192.78 172.64.32.78 173.245.58.78 2606:4700:50::adf5:3a4e 2803:f800:50::6ca2:c04e 2a06:98c1:50::ac40:204e	brit.ns.cloudflare.com brit.ns.cloudflare.com brit.ns.cloudflare.com brit.ns.cloudflare.com brit.ns.cloudflare.com brit.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
mack.ns.cloudflare.com	108.162.195.37 162.159.44.37 172.64.35.37 2606:4700:58::a29f:2c25 2803:f800:50::6ca2:c325 2a06:98c1:50::ac40:2325	mack.ns.cloudflare.com mack.ns.cloudflare.com mack.ns.cloudflare.com mack.ns.cloudflare.com mack.ns.cloudflare.com mack.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records1 records 24ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.55	300s	vm1251.enterprisecloud.nu	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 134ms

TXT Record
v=spf1 -all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.esbu.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

🔗 TLSA / DANE

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

🔐 DNSSEC91ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA0ms

Field	Value
Serial	2413319112
Primary NS (MNAME)	brit.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

25ms

A

24ms

MX

24ms

AAAA

25ms

TXT

134ms

CAA

33ms

HTTPS

30ms

TLSA

254ms

SOA

0ms

MTA-STS

49ms

DNSSEC

91ms

SRV

55ms

Total

2553ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 15:51:00	2553ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-14 02:49:50	3573ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-06 21:04:38	930ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-26 09:05:03	8943ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-24 08:08:43	839ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-10 15:38:07	1027ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-06-23 04:31:00	830ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-06-20 04:15:19	436ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-06-17 08:20:16	366ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-06-17 08:20:11	430ms	2 NS 1 A 0 MX	🔒 Secure	View