c-tas.dk

📜 Historical scan 2026-08-28 06:38:04 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c-tas.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 9 October 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 192.38.84.35 is hosted by IDDQD-AS (AS1835) in Denmark. Mail is handled by mx1.spamfilter.cc, mx2.spamfilter.cc and 1 more. The zone is DNSSEC-signed and validates, has no 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#

2 records 60ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 58ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
192.38.84.35	43200s	—	AS1835	IDDQD-AS	192.38.0.0/17	🇩🇰 Denmark	Kongens Lyngby

📧 MX Records#

3 records 49ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mx1.spamfilter.cc	2001:19f0:5001:1b34:5400:3ff:fe0e:a8b5 95.179.139.219 95.179.218.56	— 95.179.139.219.vultrusercontent.com 95.179.218.56.vultrusercontent.com	AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC
10	43200s	mx2.spamfilter.cc	2001:19f0:5001:1b34:5400:3ff:fe0e:a8b5 95.179.139.219 95.179.218.56	— 95.179.139.219.vultrusercontent.com 95.179.218.56.vultrusercontent.com	AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC
20	43200s	mx3.spamfilter.cc	2001:19f0:5001:1b34:5400:3ff:fe0e:a8b5 95.179.139.219 95.179.218.56	— 95.179.139.219.vultrusercontent.com 95.179.218.56.vultrusercontent.com	AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝

No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-10 14:59:52

www CNAME	external.sitecore.dtu.dk (all on dtu.dk) → 52.236.166.178 (AS8075)
www vs bare domain	Different networks c-tas.dk: 192.38.84.35 (AS1835) www.c-tas.dk: 52.236.166.178 (AS8075) (all like this)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔗 TLSA / DANE#

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

🔐 DNSSEC#

9138ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026041201
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-09 23:57:38

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2006-10-09
Expires	2026-10-31 (14d)

📋 WHOIS#

⏱️ Lookup Timing#

60ms

58ms

49ms

AAAA

49ms

TXT

168ms

CAA

58ms

HTTPS

55ms

TLSA

107ms

SOA

0ms

MTA-STS

60ms

DNSSEC

9138ms

SRV

57ms

Total

9939ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-10 14:59:52	1524ms	2 NS 1 A 3 MX	🔒 Secure
2026-09-28 06:29:55	1360ms	2 NS 1 A 3 MX	🔒 Secure
2026-09-23 00:42:14	855ms	2 NS 1 A 3 MX	🔒 Secure
2026-09-10 12:56:53	4928ms	2 NS 1 A 3 MX	🔒 Secure
2026-08-28 06:38:04 shown	9939ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-24 12:35:04	3534ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-23 15:22:47	941ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 17:33:55	3109ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-16 18:49:58	615ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-16 18:40:12	763ms	2 NS 1 A 3 MX	🔒 Secure