mastertech.dk

📜 Historical scan 2026-09-06 21:17:14 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

mastertech.dk is a .dk domain served by 2 nameservers (edna.ns.cloudflare.com, kai.ns.cloudflare.com). It was registered on 17 November 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.70.77 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 more. 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 108ms

Nameserver	IP addresses	PTR	ASN / ISP
edna.ns.cloudflare.com	108.162.192.109 172.64.32.109 173.245.58.109 2606:4700:50::adf5:3a6d 2803:f800:50::6ca2:c06d 2a06:98c1:50::ac40:206d	edna.ns.cloudflare.com edna.ns.cloudflare.com edna.ns.cloudflare.com edna.ns.cloudflare.com edna.ns.cloudflare.com edna.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kai.ns.cloudflare.com	108.162.193.188 172.64.33.188 173.245.59.188 2606:4700:58::adf5:3bbc 2803:f800:50::6ca2:c1bc 2a06:98c1:50::ac40:21bc	kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.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 108ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.70.77	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.221.163	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 151ms

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

🔷 AAAA Records (IPv6)#

2 records 128ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::6815:464d	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:dda3	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 116ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.70.77,172.67.221.163 ech=AEX+DQBBEAAgACAegj4fmTjvi6qZBBAjjU4MQzVkGUpNZtvZgKXRh1spXAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:464d,2606:4700:3037::ac43:dda3

📝 TXT Records#

1 records 245ms

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

✉️ SPF#

Policy	Record (mastertech.dk)
-all (hard fail)	v=spf1 include:_spf.centerasecurity.dk include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.mastertech.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:63c7d7278d628@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 2026-10-08 15:28:39

www	104.21.70.77 172.67.221.163 2606:4700:3032::6815:464d 2606:4700:3037::ac43:dda3 (AS13335) (address records, no CNAME)
www vs bare domain	Same network mastertech.dk: 104.21.70.77 172.67.221.163 2606:4700:3032::6815:464d 2606:4700:3037::ac43:dda3 (AS13335) www.mastertech.dk: 104.21.70.77 172.67.221.163 2606:4700:3032::6815:464d 2606:4700:3037::ac43:dda3 (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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

6 records 571ms

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#

183ms

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	2413655918
Primary NS (MNAME)	edna.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-03 13:50:40

Field	Value
Registrar	CURANET A/S
Registered	1998-11-17
Expires	2026-12-31 (73d)

📋 WHOIS#

⏱️ Lookup Timing#

108ms

151ms

AAAA

128ms

TXT

245ms

CAA

138ms

HTTPS

116ms

TLSA

571ms

SOA

0ms

MTA-STS

111ms

DNSSEC

183ms

SRV

141ms

Total

1528ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-06 14:15:58	2211ms	2 NS 2 A 3 MX	🔓 Insecure
2026-10-03 13:15:04	982ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-17 00:00:31	1276ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-12 16:11:21	1629ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-06 21:17:14 shown	1528ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-28 10:34:30	762ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-19 20:08:08	869ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-08 03:58:13	980ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-26 17:45:55	816ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-20 13:09:22	980ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-03 10:17:59	680ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-18 05:52:32	801ms	2 NS 2 A 0 MX	🔓 Insecure