businessinstitute.dk

Records from scan: 2026-10-10 07:39:47 · 2416ms total · last checked 2026-10-19 22:18 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

businessinstitute.dk is a .dk domain served by 2 nameservers (lady.ns.cloudflare.com, yahir.ns.cloudflare.com). It was registered on 25 January 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.38.114 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by businessinstitute-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 29ms

Nameserver	IP addresses	PTR	ASN / ISP
lady.ns.cloudflare.com	108.162.192.127 172.64.32.127 173.245.58.127 2606:4700:50::adf5:3a7f 2803:f800:50::6ca2:c07f 2a06:98c1:50::ac40:207f	lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
yahir.ns.cloudflare.com	108.162.195.34 162.159.44.34 172.64.35.34 2606:4700:58::a29f:2c22 2803:f800:50::6ca2:c322 2a06:98c1:50::ac40:2322	yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.38.114	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.222.70	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 31ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	businessinstitute-dk.mail.protection.outlook.com	2a01:111:f403:ca09::a 2a01:111:f403:ca21::8 2a01:111:f403:ca21::a 2a01:111:f403:ca48::a 52.101.181.156 52.101.73.153 52.101.91.162 52.101.91.21	mail-am7pr02cu00202.inbound.protection.outlook.com mail-matpr04cu00100.inbound.protection.outlook.com mail-maspr04cu00102.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-wa4pr05cu00104.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-matpr04cu00302.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 → 52.98.154.152

🔷 AAAA Records (IPv6)#

2 records 38ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::6815:2672	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:de46	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 41ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.38.114,172.67.222.70 ech=AEX+DQBBRgAgACCLQwon8+28q4EFbS9u64/RwqgcHTd+oOlG0rYTcYJvbQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:2672,2606:4700:3037::ac43:de46

🔌 SRV Records#

1 records 102ms

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

📝 TXT Records#

3 records 370ms

TXT Record
google-site-verification=4mYWJ-Hs804WOQyh9DAWq9rqLsT_LMVe-Xcr62bguKs
MS=ms17506444
v=spf1 include:_spf.mlsend.com include:_spf.google.com include:spf.protection.outlook.com include:spf.eu.signature365.net ~all

✉️ SPF#

Policy	Record (businessinstitute.dk)
~all (soft fail)	v=spf1 include:_spf.mlsend.com include:_spf.google.com include:spf.protection.outlook.com include:spf.eu.signature365.net ~all

📨 DMARC#

Policy	Record (_dmarc.businessinstitute.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:rua+xcg75gf9wro2@dmarcwise.email;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

Status	Report address (rua)
✓ Enabled	mailto:rua+xcg75gf9wro2@dmarcwise.email

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

checked 2026-10-10 07:39:47

www	104.21.38.114 172.67.222.70 2606:4700:3032::6815:2672 2606:4700:3037::ac43:de46 (AS13335) (address records, no CNAME)
www vs bare domain	Same network businessinstitute.dk: 104.21.38.114 172.67.222.70 2606:4700:3032::6815:2672 2606:4700:3037::ac43:de46 (AS13335) www.businessinstitute.dk: 104.21.38.114 172.67.222.70 2606:4700:3032::6815:2672 2606:4700:3037::ac43:de46 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
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
s1	s1.domainkey.u24695452.wl203.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u24695452.wl203.sendgrid.net	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: 4/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.businessinstitute.dk	PUeR_gwz8A-yyroIRuvhcadu2P_PIlGLYvRxE4hWwHg

🔗 TLSA / DANE#

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

🔐 DNSSEC#

114ms

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

🏷️ SOA#

45ms

Field	Value
Serial	2417042124
Primary NS (MNAME)	lady.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-18 20:57:56

Field	Value
Registrar	CURANET A/S
Registered	2007-01-25
Expires	2028-01-31 (468d)

🔗 Same registrant#

3 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
f5-networking.dk	CURANET A/S
f5-update.dk	CURANET A/S
f5.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

29ms

43ms

31ms

AAAA

38ms

TXT

370ms

CAA

40ms

HTTPS

41ms

TLSA

966ms

SOA

45ms

MTA-STS

58ms

DNSSEC

114ms

SRV

102ms

Total

2416ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-10 07:39:47 shown	2416ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-06 01:56:56	1083ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-01 01:30:32	797ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-29 18:55:43	1286ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-16 18:09:13	1643ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-14 23:58:07	2188ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-23 03:31:25	8432ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-09 05:08:16	9595ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-06 18:42:50	1767ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-17 14:06:52	1936ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-05 22:47:19	1511ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-16 17:50:27	774ms	2 NS 2 A 1 MX	🔒 Secure