ja4.dk

📜 Historical scan 2026-06-17 21:48:24 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ja4.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 31 March 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by ja4-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 171ms

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 170ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.20.205.49	—	linux375.unoeuro.com	AS48854	—	—	—	—

📧 MX Records#

1 records 164ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	ja4-dk.mail.protection.outlook.com	2a01:111:f403:ca04::8 2a01:111:f403:ca04::f 2a01:111:f403:ca09:: 2a01:111:f403:ca09::f 52.101.68.16 52.101.68.36 52.101.73.24 52.101.73.6	mail-db5pr02cu00100.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db5pr02cu00104.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 → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 190ms

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

📝 TXT Records#

2 records 202ms

TXT Record
MS=ms29902530
v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all

✉️ SPF#

Policy	Record (ja4.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.simply.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 2026-10-13 00:10:56

www	185.20.205.49 (AS48854) (address records, no CNAME)
www vs bare domain	Same network ja4.dk: 185.20.205.49 (AS48854) www.ja4.dk: 185.20.205.49 (AS48854)
Wildcard	No
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#

1 found

Selector	CNAME	Key
selector1	selector1-ja4-dk._domainkey.ja4dk.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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

220ms

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

🏷️ SOA#

154ms

Field	Value
Serial	2025091500
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 14:12:14

Field	Value
Registrar	Simply.com A/S
Registered	2022-03-31
Expires	2027-03-30 (164d)

📋 WHOIS#

⏱️ Lookup Timing#

171ms

170ms

164ms

AAAA

176ms

TXT

202ms

CAA

152ms

HTTPS

173ms

TLSA

193ms

SOA

154ms

MTA-STS

174ms

DNSSEC

220ms

SRV

190ms

Total

1067ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 00:10:56	928ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-02 09:21:50	969ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-30 08:58:50	1075ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-26 18:38:38	812ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-17 21:48:24 shown	1067ms	4 NS 1 A 1 MX	🔒 Secure