duco.dk DNS records

🖥️ Nameservers2 records 50ms

Nameserver	IP addresses	PTR	ASN / ISP
tia.ns.cloudflare.com	108.162.192.229 172.64.32.229 173.245.58.229 2606:4700:50::adf5:3ae5 2803:f800:50::6ca2:c0e5 2a06:98c1:50::ac40:20e5	tia.ns.cloudflare.com tia.ns.cloudflare.com tia.ns.cloudflare.com tia.ns.cloudflare.com tia.ns.cloudflare.com tia.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
west.ns.cloudflare.com	108.162.193.247 172.64.33.247 173.245.59.247 2606:4700:58::adf5:3bf7 2803:f800:50::6ca2:c1f7 2a06:98c1:50::ac40:21f7	west.ns.cloudflare.com west.ns.cloudflare.com west.ns.cloudflare.com west.ns.cloudflare.com west.ns.cloudflare.com west.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 48ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.0.93	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.150.204	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records1 records 53ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	duco-dk.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca04::d 2a01:111:f403:ca04::f 2a01:111:f403:ca09::7 52.101.209.153 52.101.68.5 52.101.73.11 52.101.73.15	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-cpjpr04cu00101.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am9pr04cu00107.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 → 40.104.116.56

🔷 AAAA Records (IPv6)2 records 57ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:5d	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3031::ac43:96cc	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 53ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.0.93,172.67.150.204 ech=AEX+DQBB6QAgACA4YTehfGaVC/yzEEv4exPF/qMw4BExFsBxrewlgT29cgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:5d,2606:4700:3031::ac43:96cc

🔌 SRV Records1 records 105ms

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

📝 TXT Records4 records 222ms

TXT Record
_ve2x9k6pra98yw34i9izo63ixs3rb1w
google-site-verification=PsEE16645Rb5cb54kB_ZIVQSfGTjq-pAHl1BneApSKE
v=spf1 include:spf.protection.outlook.com -all
y82b9wjpbklmrzrzgvc0bpfrlrrn0fkj

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.duco.dk)
p=reject	v=DMARC1; p=reject; pct=100

📬 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.duco.dk	ZBa5C1lnkSdgn1irC0pczN4jdopnx7x5-wPZID13jsA
TXT	_acme-challenge.duco.dk	ijO5xVUH6LC4qV5ehws_GHve7PP1XwhkU3YzqLOl2sE

🔗 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	2410914914
Primary NS (MNAME)	tia.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

50ms

A

48ms

MX

53ms

AAAA

57ms

TXT

222ms

CAA

46ms

HTTPS

53ms

TLSA

208ms

SOA

0ms

MTA-STS

64ms

DNSSEC

91ms

SRV

105ms

Total

994ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-03 02:19:06	994ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-27 12:51:50	1118ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-07 05:14:50	2340ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-30 09:59:33	2504ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-02 00:53:38	1370ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-17 04:55:21	3836ms	2 NS 2 A 1 MX	🔓 Insecure	View