optimal.dk DNS records

🖥️ Nameservers2 records 423ms

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 379ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
162.159.137.9	3599s	—	AS13335	Cloudflare, Inc.	162.159.128.0/19	—	—

📧 MX Records1 records 317ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	optimal-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::c 2a01:111:f403:ca09::20 2a01:111:f403:ca09::4 52.101.68.0 52.101.68.29 52.101.68.5 52.101.73.1	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-db3pr0202cu00100.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-am3pr04cu00501.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 Records2 records 945ms

TXT Record
MS=ms52512803
v=spf1 include:spf.protection.outlook.com ip4:152.115.60.216 ip4:82.192.172.150 -all

✉️ SPF

Policy	Record (optimal.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com ip4:152.115.60.216 ip4:82.192.172.150 -all

📨 DMARC

Policy	Record (_dmarc.optimal.dk)
p=quarantine	v=DMARC1;p=quarantine;pct=100

📬 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)

🔐 DNSSEC605ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082102
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

423ms

A

379ms

MX

317ms

AAAA

398ms

TXT

945ms

CAA

379ms

HTTPS

424ms

TLSA

1025ms

SOA

0ms

MTA-STS

458ms

DNSSEC

605ms

SRV

455ms

Total

9003ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-21 17:07:00	9003ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-20 17:02:37	9353ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-19 04:22:14	5912ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-05 04:03:20	1977ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-26 22:28:10	1798ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-26 09:11:48	1089ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-18 07:30:39	4714ms	2 NS 1 A 1 MX	🔒 Secure	View