horizon3.dk

📜 Historical scan 2026-06-20 23:10:52 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

horizon3.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 25 March 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.128 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by horizon3-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#

4 records 99ms

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
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 115ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.231.103.128	3600s	linux110.unoeuro.com	AS48854	team.blue Denmark A/S	94.231.96.0/20	🇩🇰 Denmark	—

📧 MX Records#

1 records 90ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	horizon3-dk.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca09::2 2a01:111:f403:ca09::3 2a01:111:f403:ca09::4 52.101.68.27 52.101.73.15 52.101.73.24 52.101.73.6	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am6pr04cu00306.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 → 40.101.27.80
🔶 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#

2 records 133ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

4 records 406ms

TXT Record
google-site-verification=MCCSTYm9a8NG8s-67tRshp3DiNJIAS5B0ikAuK5h6Lg
google-site-verification=yPeGwY2xQ-r7GynYsbD7Yqn0lCBB59taKatKkWEmrPM
MS=ms77786337
v=spf1 include:spf.simply.com include:spf.protection.outlook.com ~all

✉️ SPF#

Policy	Record (horizon3.dk)
~all (soft fail)	v=spf1 include:spf.simply.com include:spf.protection.outlook.com ~all

📨 DMARC#

Policy	Record (_dmarc.horizon3.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 23:22:04

www	94.231.103.128 (AS48854) (address records, no CNAME)
www vs bare domain	Same network horizon3.dk: 94.231.103.128 (AS48854) www.horizon3.dk: 94.231.103.128 (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

🔎 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#

338ms

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

🏷️ SOA#

138ms

Field	Value
Serial	2025042300
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 2026-10-10 21:24:53

Field	Value
Registrar	Simply.com A/S
Registered	2022-03-25
Expires	2027-03-24 (156d)

📋 WHOIS#

⏱️ Lookup Timing#

99ms

115ms

90ms

AAAA

129ms

TXT

406ms

CAA

135ms

HTTPS

149ms

TLSA

190ms

SOA

138ms

MTA-STS

102ms

DNSSEC

338ms

SRV

133ms

Total

1295ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 22:01:31	1147ms	4 NS 1 A 1 MX	🔓 Insecure
2026-09-30 21:41:06	961ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-20 23:10:52 shown	1295ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-17 13:23:21	304ms	0 NS 0 A 0 MX	❓ Unknown