ducas.dk DNS records

🖥️ Nameservers2 records 77ms

Nameserver	IP addresses	PTR	ASN / ISP
perla.ns.cloudflare.com	108.162.194.203 162.159.38.203 172.64.34.203 2606:4700:50::a29f:26cb 2803:f800:50::6ca2:c2cb 2a06:98c1:50::ac40:22cb	perla.ns.cloudflare.com perla.ns.cloudflare.com perla.ns.cloudflare.com perla.ns.cloudflare.com perla.ns.cloudflare.com perla.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
uriah.ns.cloudflare.com	108.162.195.194 162.159.44.194 172.64.35.194 2606:4700:58::a29f:2cc2 2803:f800:50::6ca2:c3c2 2a06:98c1:50::ac40:23c2	uriah.ns.cloudflare.com uriah.ns.cloudflare.com uriah.ns.cloudflare.com uriah.ns.cloudflare.com uriah.ns.cloudflare.com uriah.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records

🌍

No A records found

📧 MX Records1 records 80ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	ducas-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca04::9 2a01:111:f403:ca09::24 2a01:111:f403:ca48::8 52.101.68.10 52.101.73.1 52.101.73.11 52.101.73.30	mail-db4pr02cu00307.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-am6pr02cu00204.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am7pr05cu00306.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)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 111ms

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

📝 TXT Records2 records 286ms

TXT Record
MS=ms24050468
v=spf1 ip4:92.43.124.218 ip4:92.43.124.143 ip4:92.43124.79 ip4:159.8.140.136 ip4:37.58.122.169 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (ducas.dk)
-all (hard fail)	v=spf1 ip4:92.43.124.218 ip4:92.43.124.143 ip4:92.43124.79 ip4:159.8.140.136 ip4:37.58.122.169 include:spf.protection.outlook.com -all

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 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)

🔐 DNSSEC112ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA0ms

Field	Value
Serial	2412791916
Primary NS (MNAME)	perla.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

77ms

A

57ms

MX

80ms

AAAA

55ms

TXT

286ms

CAA

69ms

HTTPS

68ms

TLSA

239ms

SOA

0ms

MTA-STS

89ms

DNSSEC

112ms

SRV

111ms

Total

1113ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 07:34:20	1113ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-08-21 21:20:03	2923ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-08-19 20:57:57	2039ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-08-18 20:43:46	4035ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-08-17 05:04:36	5700ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-08-15 10:23:38	2073ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-06-28 13:56:42	1093ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-06-26 04:41:27	2205ms	2 NS 0 A 1 MX	🔓 Insecure	View
2026-06-24 00:35:49	897ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-23 17:16:12	1170ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 04:55:18	635ms	2 NS 0 A 1 MX	🔓 Insecure	View