optimumit.dk DNS records

🖥️ Nameservers2 records 45ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records1 records 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
40.69.205.225	900s	—	AS8075	Microsoft Corporation	40.68.0.0/14	🇮🇪 Ireland	Dublin

📧 MX Records1 records 37ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	optimumit-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca04::e 2a01:111:f403:ca09:: 2a01:111:f403:ca09::7 52.101.68.0 52.101.68.36 52.101.68.5 52.101.73.15	mail-db4pr02cu00204.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-du2pr03cu00105.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 → 40.104.116.40

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 116ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 168ms

TXT Record
MS=ms65123919
v=spf1 mx include:spf.protection.outlook.com -all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.optimumit.dk)
p=quarantine	v=DMARC1; p=quarantine; ruf=mailto:hostmaster@optimumit.dk; adkim=s; aspf=s;

📬 MTA-STS

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records4 records 44ms

Flags	Tag	Value
0	issue	digicert.com
0	issue	sectigo.com
0	issuewild	digicert.com
0	issuewild	sectigo.com

🔗 TLSA / DANE

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC80ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA0ms

Field	Value
Serial	2026081102
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

45ms

A

43ms

MX

37ms

AAAA

40ms

TXT

168ms

CAA

44ms

HTTPS

33ms

TLSA

329ms

SOA

0ms

MTA-STS

57ms

DNSSEC

80ms

SRV

116ms

Total

1460ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-12 11:12:22	1460ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-18 00:36:11	1181ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-16 00:48:25	1332ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-28 07:24:50	735ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-23 20:36:37	3082ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-22 10:21:50	1094ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-18 04:27:34	870ms	2 NS 1 A 1 MX	🔒 Secure	View