i4.dk

📜 Historical scan 2026-06-27 22:38:38 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

i4.dk is a .dk domain served by 2 nameservers (anirban.ns.cloudflare.com, stella.ns.cloudflare.com). It was registered on 9 February 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.44.170 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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#

2 records 46ms

Nameserver	IP addresses	PTR	ASN / ISP
anirban.ns.cloudflare.com	108.162.193.64 172.64.33.64 173.245.59.64 2606:4700:58::adf5:3b40 2803:f800:50::6ca2:c140 2a06:98c1:50::ac40:2140	anirban.ns.cloudflare.com anirban.ns.cloudflare.com anirban.ns.cloudflare.com anirban.ns.cloudflare.com anirban.ns.cloudflare.com anirban.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
stella.ns.cloudflare.com	108.162.194.154 162.159.38.154 172.64.34.154 2606:4700:50::a29f:269a 2803:f800:50::6ca2:c29a 2a06:98c1:50::ac40:229a	stella.ns.cloudflare.com stella.ns.cloudflare.com stella.ns.cloudflare.com stella.ns.cloudflare.com stella.ns.cloudflare.com stella.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 54ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.44.170	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.201.152	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 52ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx1-dk.centerasecurity.dk	128.76.60.167 128.76.60.187 89.233.19.127 89.233.19.127 89.233.19.188 89.233.19.188	mx6.centerasecurity.dk mx6.centerasecurity.dk 127.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 188.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S
10	300s	mx2-dk.centerasecurity.dk	128.76.60.168 128.76.60.169 89.233.19.128 89.233.19.128 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk mx6.centerasecurity.dk 128.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S
20	300s	mx3-dk.centerasecurity.dk	128.76.60.187 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.56

🔷 AAAA Records (IPv6)#

2 records 40ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::6815:2caa	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3033::ac43:c998	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 49ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.44.170,172.67.201.152 ech=AEX+DQBBFgAgACAHLebld4IUA+gNDxH8mXA4AAKUnLTf/3QyY04Sn3LacAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:2caa,2606:4700:3033::ac43:c998

🔌 SRV Records#

1 records 119ms

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

📝 TXT Records#

3 records 208ms

TXT Record
have-i-been-pwned-verification=225333a975f03c8f957ebb57fce859cc
P-UmqyD5RkFJ
v=spf1 include:_spf16190.spfprotect.com -all

✉️ SPF#

Policy	Record (i4.dk)
-all (hard fail)	v=spf1 include:_spf16190.spfprotect.com -all

📨 DMARC#

Policy	Record (_dmarc.i4.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:6439544360c11@dmarc.centerasecurity.com; ruf=mailto:6439544360c11@dmarc.centerasecurity.com; fo=0:1:d:s; pct=10; adkim=s; aspf=r

📬 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 2026-10-15 06:57:48

www	104.21.44.170 172.67.201.152 2606:4700:3031::ac43:c998 2606:4700:3037::6815:2caa (AS13335) (address records, no CNAME)
www vs bare domain	Same network i4.dk: 104.21.44.170 172.67.201.152 2606:4700:3031::ac43:c998 2606:4700:3037::6815:2caa (AS13335) www.i4.dk: 104.21.44.170 172.67.201.152 2606:4700:3031::ac43:c998 2606:4700:3037::6815:2caa (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

🔎 SPF check#

zone-wide SPF report

DNS lookups: 6/10 · policy: -all

No problems found

🔗 TLSA / DANE#

6 records 73ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…

🔐 DNSSEC#

68ms

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

🏷️ SOA#

35ms

Field	Value
Serial	2407893214
Primary NS (MNAME)	anirban.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-15 07:23:21

Field	Value
Registrar	CURANET A/S
Registered	2012-02-09
Expires	2027-02-28 (133d)

🔗 Same registrant#

8 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
2do-it.dk	CURANET A/S
2dohost.dk	Punktum dk A/S (direct)
2talit.dk	CURANET A/S
59511500.dk	CURANET A/S
beezy365it.dk	CURANET A/S
borchers.dk	Punktum dk A/S (direct)
dokumentscan.dk	CURANET A/S
jo-service.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

46ms

54ms

52ms

AAAA

40ms

TXT

208ms

CAA

37ms

HTTPS

49ms

TLSA

73ms

SOA

35ms

MTA-STS

71ms

DNSSEC

68ms

SRV

119ms

Total

1066ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 06:57:48	569ms	2 NS 2 A 3 MX	🔒 Secure
2026-10-09 21:54:12	1501ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-27 10:51:49	10764ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-22 20:48:55	2218ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-15 19:49:21	1070ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-29 00:11:10	1823ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-24 21:03:12	872ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-12 07:47:12	3226ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-07 04:43:59	1874ms	2 NS 2 A 3 MX	🔒 Secure
2026-07-13 08:42:01	3478ms	2 NS 2 A 3 MX	🔒 Secure
2026-06-27 22:38:38 shown	1066ms	2 NS 2 A 3 MX	🔒 Secure
2026-06-24 16:56:56	1222ms	2 NS 2 A 3 MX	🔒 Secure
2026-06-17 11:51:20	1105ms	2 NS 2 A 3 MX	🔒 Secure