ju.dk

📜 Historical scan 2026-10-12 03:26:34 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ju.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 30 September 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 52.232.87.92 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by ju-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#

3 records 146ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.efif.dk	195.254.168.23	ns.efif.dk	AS51073 Aarhus Business College
ns2.efif.dk	195.254.168.12	ns2.efif.dk	AS51073 Aarhus Business College
ns3.efif.dk	20.23.170.35	—	AS8075 Microsoft Corporation

🌍 A Records#

1 records 71ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
52.232.87.92	300s	—	AS8075	Microsoft Corporation	52.224.0.0/11	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

1 records 137ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	ju-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::b 2a01:111:f403:ca09::20 2a01:111:f403:ca48::a 52.101.209.153 52.101.209.28 52.101.68.8 52.101.91.156	mail-dbapr03cu00100.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-cpjpr04cu00101.inbound.protection.outlook.com mail-cpjpr05cu00104.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-maspr04cu00104.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 → 52.98.149.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 710ms

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

📝 TXT Records#

3 records 311ms

TXT Record
Jordbrugets Uddannelsescenter
MS=ms73887563
v=spf1 include:spf.protection.outlook.com include:amazonses.com include:_spf.illumi.dk include:spf.mcb.dk ip4:13.93.34.87 -all

✉️ SPF#

Policy	Record (ju.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:amazonses.com include:_spf.illumi.dk include:spf.mcb.dk ip4:13.93.34.87 -all

📨 DMARC#

Policy	Record (_dmarc.ju.dk)
p=reject	v=DMARC1; p=reject; pct=100; ruf=mailto:analyze@ju.dk; rua=mailto:64e88d13a948b@dmarc.centerasecurity.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 2026-10-16 16:29:01

www	52.232.87.92 (AS8075) (address records, no CNAME)
www vs bare domain	Same network ju.dk: 52.232.87.92 (AS8075) www.ju.dk: 52.232.87.92 (AS8075)
Wildcard	No
Denial of existence	NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

3 found

Selector	CNAME	Key
s1	s1.domainkey.u507526.wl027.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u507526.wl027.sendgrid.net	RSA · ~1024 bit below 2048 bit
selector2	selector2-ju-dk._domainkey.efif.onmicrosoft.com	RSA · ~1024 bit below 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: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

162ms

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

🏷️ SOA#

85ms

Field	Value
Serial	2016011650
Primary NS (MNAME)	ns.efif.dk
Responsible (RNAME)	dns-zc@efif.dk
Refresh	14400s
Retry	3600s
Expire	2419200s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-13 09:41:29

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2002-09-30
Expires	2027-09-30 (348d)

🔗 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
dcj.dk	Punktum dk A/S (direct)
jordbrugsuddannelse.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

146ms

71ms

137ms

AAAA

139ms

TXT

311ms

CAA

141ms

HTTPS

131ms

TLSA

207ms

SOA

85ms

MTA-STS

140ms

DNSSEC

162ms

SRV

710ms

Total

4276ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 16:29:01	1200ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-14 12:21:50	1669ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-13 09:22:31	2483ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-12 03:26:34 shown	4276ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-12 03:25:14	5017ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-11 01:45:29	1238ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-09 07:22:05	3591ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-08 07:19:48	1381ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-05 05:05:56	2241ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-03 04:54:48	1189ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-02 04:53:49	730ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-01 04:40:19	1722ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-30 04:23:51	1076ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-29 05:09:59	1970ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-27 04:20:37	2725ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-24 03:49:39	2168ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-23 01:38:19	978ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-18 07:46:15	1108ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-11 06:29:34	2077ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-05 21:45:56	3864ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-29 21:39:47	989ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-28 02:48:51	844ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-27 01:55:46	1587ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-24 18:06:35	16566ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-23 17:39:48	5056ms	3 NS 1 A 1 MX	🔒 Secure