optimumgroup.dk DNS records

🖥️ Nameservers3 records 71ms

Nameserver	IP addresses	PTR	ASN / ISP
nsauth1.introweb.nl	2001:1690:1:a::a 80.65.96.48	nsauth1.introweb.nl nsauth1.introweb.nl	AS20847 Previder B.V. AS20847 Previder B.V.
nsauth2.introweb.nl	2a0d:8600:1::5a 86.105.160.91	nsauth2.introweb.nl nsauth2.introweb.nl	AS205185 Eurofiber Cloud Infra B.V. AS205185 Eurofiber Cloud Infra B.V.
nsauth3.introweb.net	2001:1690:1:c::a 62.165.127.221	nsauth3.introweb.net nsauth3.introweb.net	AS20847 Previder B.V. AS20847 Previder B.V.

🌍 A Records1 records 47ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
85.13.155.44	3600s	dd38538.kasserver.com	AS34788	Neue Medien Muennich GmbH	85.13.128.0/18	🇩🇪 Germany	—

📧 MX Records1 records 41ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	optimumgroup-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::c 2a01:111:f403:ca09:: 2a01:111:f403:ca48::c 52.101.68.16 52.101.68.5 52.101.73.153 52.101.73.155	mail-db7pr03cu00401.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-miypr03cu00104.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-du2pr03cu00105.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 → 40.104.116.8

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records3 records 315ms

TXT Record
google-site-verification=iBK9wylFRtFzFWila3InIYnRZHfD-8ajXNgyYgibJRg
MS=ms46259138
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (optimumgroup.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)

🔐 DNSSEC106ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2022092901
Primary NS (MNAME)	nsauth1.introweb.nl
Responsible (RNAME)	postmaster@introweb.nl
Refresh	28800s
Retry	7200s
Expire	604800s
Minimum (neg-cache TTL)	86400s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

71ms

A

47ms

MX

41ms

AAAA

51ms

TXT

315ms

CAA

51ms

HTTPS

57ms

TLSA

366ms

SOA

0ms

MTA-STS

97ms

DNSSEC

106ms

SRV

98ms

Total

2650ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 05:13:25	2650ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-25 05:56:56	3308ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-22 00:56:57	875ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-20 20:53:10	1297ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-20 19:49:07	1202ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-18 04:01:16	1511ms	3 NS 1 A 1 MX	🔓 Insecure	View