dueholm-solution.dk DNS records

🖥️ Nameservers4 records 50ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.bdm.microsoftonline.com	13.107.236.208 2603:1061:0:700::d0	ns1-208.azure-dns.com ns1-208.azure-dns.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns2.bdm.microsoftonline.com	150.171.21.208 2620:1ec:8ec:700::d0	ns2-208.azure-dns.net ns2-208.azure-dns.net	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns3.bdm.microsoftonline.com	204.14.183.208 2a01:111:4000:700::d0	ns3-208.azure-dns.org ns3-208.azure-dns.org	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns4.bdm.microsoftonline.com	208.84.5.208 2620:1ec:bda:700::d0	ns4-208.azure-dns.info ns4-208.azure-dns.info	AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🌍 A Records1 records 47ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.9.90.188	3600s	host6.slyde.dk	AS24940	Hetzner Online GmbH	5.9.0.0/16	🇩🇪 Germany	Falkenstein

📧 MX Records1 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	dueholmsolution-dk01i.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca09::1 2a01:111:f403:ca09::28 2a01:111:f403:ca48::c 52.101.68.3 52.101.73.12 52.101.73.153 52.101.73.155	mail-db4pr02cu00406.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-miypr03cu00104.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-am7pr02cu00203.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 → 52.98.149.136

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 67ms

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

📝 TXT Records2 records 190ms

TXT Record
mscid=8O/CuR2ZtIXWiwjzrs802Bky5ohXFsvz8JIKpj9xvtYVqrka2qHsv6W5ej2BNSBabvs8QNbc23tgYN+OuGQkjw==
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

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

🔐 DNSSEC9076ms

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	1
Primary NS (MNAME)	ns1.bdm.microsoftonline.com
Responsible (RNAME)	azuredns-hostmaster@microsoft.com
Refresh	3600s
Retry	300s
Expire	2419200s
Minimum (neg-cache TTL)	300s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

50ms

A

47ms

MX

43ms

AAAA

48ms

TXT

190ms

CAA

36ms

HTTPS

43ms

TLSA

668ms

SOA

0ms

MTA-STS

55ms

DNSSEC

9076ms

SRV

67ms

Total

10238ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-01 12:28:42	10238ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-08-26 09:54:26	1140ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-25 10:55:24	3611ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-23 11:56:40	2053ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-23 07:20:51	905ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 04:55:59	668ms	4 NS 1 A 1 MX	🔓 Insecure	View