opter.dk

📜 Historical scan 2026-06-23 15:21:16 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

opter.dk is a .dk domain served by 4 nameservers (ns1-07.azure-dns.com, ns2-07.azure-dns.net, ns3-07.azure-dns.org and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.201.61.217 is hosted by ODERLAND Webbhotell AB (AS44136) in Sweden. Mail is handled by opter-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no 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#

4 records 183ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1-07.azure-dns.com	13.107.236.7 2603:1061:0:700::7	ns1-07.azure-dns.com ns1-07.azure-dns.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns2-07.azure-dns.net	150.171.21.7 2620:1ec:8ec:700::7	ns2-07.azure-dns.net ns2-07.azure-dns.net	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns3-07.azure-dns.org	204.14.183.7 2a01:111:4000:700::7	ns3-07.azure-dns.org ns3-07.azure-dns.org	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns4-07.azure-dns.info	208.84.5.7 2620:1ec:bda:700::7	ns4-07.azure-dns.info ns4-07.azure-dns.info	AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🌍 A Records#

1 records 213ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.201.61.217	3600s	uke.oderland.com	AS44136	ODERLAND Webbhotell AB	91.201.60.0/22	🇸🇪 Sweden	—

📧 MX Records#

1 records 247ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	opter-dk.mail.protection.outlook.com	52.101.68.27 52.101.73.12 52.101.73.2 52.101.73.6	mail-db7pr03cu00503.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as9pr07cu00302.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 335ms

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

📝 TXT Records#

2 records 480ms

TXT Record
MS=ms14802292
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (opter.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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-09 10:00:24

www	91.201.61.217 (AS44136) (address records, no CNAME)
www vs bare domain	Same network opter.dk: 91.201.61.217 (AS44136) www.opter.dk: 91.201.61.217 (AS44136)
Wildcard	No

🔎 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#

325ms

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

🏷️ SOA#

272ms

Field	Value
Serial	1
Primary NS (MNAME)	ns1-07.azure-dns.com
Responsible (RNAME)	azuredns-hostmaster@microsoft.com
Refresh	3600s
Retry	300s
Expire	2419200s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

183ms

213ms

247ms

AAAA

205ms

TXT

480ms

CAA

203ms

HTTPS

208ms

TLSA

466ms

SOA

272ms

MTA-STS

204ms

DNSSEC

325ms

SRV

335ms

Total

2024ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 10:00:24	1230ms	4 NS 1 A 1 MX	🔓 Insecure
2026-10-01 00:46:20	710ms	4 NS 1 A 1 MX	🔓 Insecure
2026-08-27 05:14:18	805ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-23 15:21:16 shown	2024ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-22 19:44:22	1180ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-22 14:06:57	1222ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-18 06:16:46	1344ms	4 NS 1 A 1 MX	🔓 Insecure