optimal.dk

📜 Historical scan 2026-06-18 07:30:39 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

optimal.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 21 March 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 162.159.137.9 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by optimal-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 35ms

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 Records#

1 records 35ms

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

📧 MX Records#

1 records 36ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	optimal-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::f 2a01:111:f403:ca09::1 2a01:111:f403:ca09::c 52.101.68.21 52.101.68.8 52.101.73.153 52.101.73.19	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com — mail-du0pr03cu00100.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-as8pr04cu00803.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 → 52.98.154.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 171ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-19 08:15:13

www CNAME	ppwxufqy.elementor.cloud (all on elementor.cloud) → 162.159.137.9 162.159.138.9 2606:4700:7::a29f:8909 2606:4700:7::a29f:8a09 (AS13335)
www vs bare domain	Same network optimal.dk: 162.159.137.9 (AS13335) www.optimal.dk: 162.159.137.9 162.159.138.9 2606:4700:7::a29f:8909 2606:4700:7::a29f:8a09 (AS13335)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-optimal-dk._domainkey.optimalrevision.onmicrosoft.com	RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

116ms

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

🏷️ SOA#

40ms

Field	Value
Serial	2026042401
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-14 03:42:06

Field	Value
Registrar	ONE.COM A/S
Registered	2023-03-21
Expires	2033-03-20 (2335d)

🔗 Same registrant#

2 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
op10mal.dk	DANDOMAIN A/S
optimal-revision.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

35ms

36ms

AAAA

34ms

TXT

171ms

CAA

34ms

HTTPS

41ms

TLSA

157ms

SOA

40ms

MTA-STS

64ms

DNSSEC

116ms

SRV

116ms

Total

4714ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-19 08:15:13	1251ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-14 03:18:01	1632ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 13:20:45	1144ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-21 17:07:00	9003ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-20 17:02:37	9353ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-19 04:22:14	5912ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-05 04:03:20	1977ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-26 22:28:10	1798ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-26 09:11:48	1089ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 07:30:39 shown	4714ms	2 NS 1 A 1 MX	🔒 Secure