it-mester.dk

📜 Historical scan 2026-09-26 15:49:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

it-mester.dk is a .dk domain served by 2 nameservers (jihoon.ns.cloudflare.com, june.ns.cloudflare.com). It was registered on 11 April 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.76.94 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by itmester-dk0e.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 45ms

Nameserver	IP addresses	PTR	ASN / ISP
jihoon.ns.cloudflare.com	108.162.195.233 162.159.44.233 172.64.35.233 2606:4700:58::a29f:2ce9 2803:f800:50::6ca2:c3e9 2a06:98c1:50::ac40:23e9	jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com jihoon.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
june.ns.cloudflare.com	108.162.192.176 172.64.32.176 173.245.58.176 2606:4700:50::adf5:3ab0 2803:f800:50::6ca2:c0b0 2a06:98c1:50::ac40:20b0	june.ns.cloudflare.com june.ns.cloudflare.com june.ns.cloudflare.com june.ns.cloudflare.com june.ns.cloudflare.com june.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 38ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.76.94	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.192.110	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 31ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	itmester-dk0e.mail.protection.outlook.com	2a01:111:f403:c967::c 2a01:111:f403:ca04::4 2a01:111:f403:ca04::9 2a01:111:f403:ca48::8 52.101.181.156 52.101.68.15 52.101.68.25 52.101.73.120	mail-cpjpr05cu00204.inbound.protection.outlook.com mail-db4pr02cu00204.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-wa4pr05cu00104.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com mail-am7pr02cu00300.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)#

2 records 39ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:c06e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:4c5e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 54ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.76.94,172.67.192.110 ech=AEX+DQBBwwAgACDJRLwfHroIIIumGYwv7zqXmjAANRm4xp/27A20HNphHAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:c06e,2606:4700:3036::6815:4c5e

🔌 SRV Records#

1 records 86ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	5	10	5061	sipfed.online.lync.com

📝 TXT Records#

1 records 176ms

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

✉️ SPF#

Policy	Record (it-mester.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.it-mester.dk)
p=reject	v=DMARC1; p=reject; sp=reject; pct=100

📬 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 23:23:51

www	104.21.76.94 172.67.192.110 2606:4700:3030::ac43:c06e 2606:4700:3036::6815:4c5e (AS13335) (address records, no CNAME)
www vs bare domain	Same network it-mester.dk: 104.21.76.94 172.67.192.110 2606:4700:3030::ac43:c06e 2606:4700:3036::6815:4c5e (AS13335) www.it-mester.dk: 104.21.76.94 172.67.192.110 2606:4700:3030::ac43:c06e 2606:4700:3036::6815:4c5e (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: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.it-mester.dk	mLD3pyZVy7mGAsigoOzgWn3hJ_jx_oeUvZlAsyV3dJQ
TXT	_acme-challenge.it-mester.dk	yzOZs39TLUZayF2jQNONWHpOcyvnUfqne4oiJod10O0

🔗 TLSA / DANE#

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

🔐 DNSSEC#

127ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415890979
Primary NS (MNAME)	jihoon.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-09-30 17:17:12

Field	Value
Registrar	NYGREEN IT ApS
Registered	2005-04-11
Expires	2027-04-30 (193d)

📋 WHOIS#

⏱️ Lookup Timing#

45ms

38ms

31ms

AAAA

39ms

TXT

176ms

CAA

36ms

HTTPS

54ms

TLSA

745ms

SOA

0ms

MTA-STS

56ms

DNSSEC

127ms

SRV

86ms

Total

1476ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 23:23:51	1370ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-01 16:36:26	1966ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-30 16:27:50	1403ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-27 16:09:44	1546ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 15:49:36 shown	1476ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-20 11:03:57	1115ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-27 14:43:03	2016ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-04 02:12:13	1529ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-31 19:36:42	2143ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-11 01:39:21	1541ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-30 07:20:08	1488ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 23:27:13	1044ms	2 NS 2 A 1 MX	🔓 Insecure