mt-holding.dk DNS records

🖥️ Nameservers4 records 73ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1-37.azure-dns.com	150.171.10.37 2603:1061:0:10::25	ns1-37.azure-dns.com ns1-37.azure-dns.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns2-37.azure-dns.net	150.171.16.37 2620:1ec:8ec:10::25	ns2-37.azure-dns.net ns2-37.azure-dns.net	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns3-37.azure-dns.org	13.107.222.37 2a01:111:4000:10::25	ns3-37.azure-dns.org ns3-37.azure-dns.org	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns4-37.azure-dns.info	13.107.206.37 2620:1ec:bda:10::25	ns4-37.azure-dns.info ns4-37.azure-dns.info	AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🌍 A Records

🌍

No A records found

📧 MX Records1 records 68ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	mtholding-dk0e.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::9 2a01:111:f403:ca09::2 2a01:111:f403:ca09::c 52.101.68.21 52.101.68.36 52.101.73.155 52.101.73.28	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am7pr02cu00203.inbound.protection.outlook.com mail-am7pr05cu00204.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 → 40.104.116.8

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 83ms

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

📝 TXT Records1 records 216ms

TXT Record
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.mt-holding.dk)
p=reject	v=DMARC1; p=reject

📬 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)

🔐 DNSSEC126ms

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	1
Primary NS (MNAME)	ns1-37.azure-dns.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

73ms

A

78ms

MX

68ms

AAAA

78ms

TXT

216ms

CAA

62ms

HTTPS

73ms

TLSA

604ms

SOA

0ms

MTA-STS

92ms

DNSSEC

126ms

SRV

83ms

Total

1729ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 15:02:58	1729ms	4 NS 0 A 1 MX	🔓 Insecure	View
2026-06-27 09:47:43	852ms	4 NS 0 A 1 MX	🔓 Insecure	View
2026-06-24 00:02:50	1151ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 13:55:48	2554ms	4 NS 0 A 1 MX	🔓 Insecure	View