opta.dk

📜 Historical scan 2026-10-01 03:24:54 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

opta.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 23 September 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.193 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by opta-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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#

3 records 37ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 42ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.193	3600s	linux303.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 55ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	opta-dk.mail.protection.outlook.com	2a01:111:f403:ca09::20 2a01:111:f403:ca09::22 2a01:111:f403:ca09::a 2a01:111:f403:ca3c::8 52.101.103.143 52.101.68.12 52.101.91.153 52.101.91.21	mail-as8pr05cu00400.inbound.protection.outlook.com mail-am7pr02cu00302.inbound.protection.outlook.com mail-am7pr02cu00202.inbound.protection.outlook.com mail-zrxpr05cu00100.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-matpr04cu00101.inbound.protection.outlook.com mail-matpr05cu00105.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 → 40.104.116.24
🔶 Autoconfig	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 71ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records#

1 records 153ms

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

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.opta.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;

📬 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 2026-10-08 04:35:11

www	93.191.156.193 (AS48854) (address records, no CNAME)
www vs bare domain	Same network opta.dk: 93.191.156.193 (AS48854) www.opta.dk: 93.191.156.193 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-opta-dk._domainkey.opta91.d-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-opta-dk._domainkey.opta91.d-v1.dkim.mail.microsoft	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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

62ms

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

🏷️ SOA#

48ms

Field	Value
Serial	2026030307
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-04 04:22:12

Field	Value
Registrar	Simply.com A/S
Registered	2025-09-23
Expires	2027-09-22 (339d)

📋 WHOIS#

⏱️ Lookup Timing#

37ms

42ms

55ms

AAAA

34ms

TXT

153ms

CAA

51ms

HTTPS

28ms

TLSA

178ms

SOA

48ms

MTA-STS

66ms

DNSSEC

62ms

SRV

71ms

Total

663ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 03:39:51	2611ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-01 03:24:54 shown	663ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-26 12:28:35	10306ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-25 05:38:08	1527ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-29 02:24:20	860ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-19 10:53:47	851ms	3 NS 1 A 1 MX	⚠️ Bogus
2026-06-18 04:28:28	873ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-18 04:07:23	2776ms	3 NS 1 A 1 MX	🔓 Insecure