dco.dk

📜 Historical scan 2026-07-01 23:53:15 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dco.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 13 November 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 213.173.250.114 is hosted by Norlys Digital A/S (AS3308) in Denmark. Mail is handled by mail.dco.dk. 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 45ms

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 49ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
213.173.250.114	43200s	—	AS3308	Norlys Digital A/S	213.173.224.0/19	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 46ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mail.dco.dk	213.173.250.114	—	AS3308 Norlys Telco A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	dco.dk → 213.173.250.114
🔶 Autoconfig	dco.dk → 213.173.250.114

🔷 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 2026-10-12 04:11:54

www	104.21.37.194 172.67.212.173 2606:4700:3030::6815:25c2 2606:4700:3035::ac43:d4ad (AS13335) (address records, no CNAME)
www vs bare domain	Same network dco.dk: 104.21.37.194 172.67.212.173 2606:4700:3030::6815:25c2 2606:4700:3035::ac43:d4ad (AS13335) www.dco.dk: 104.21.37.194 172.67.212.173 2606:4700:3030::6815:25c2 2606:4700:3035::ac43:d4ad (AS13335)
Wildcard	Yes: any name under the zone resolves

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.dco.dk	dco.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

103ms

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

🏷️ SOA#

42ms

Field	Value
Serial	2026061101
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 2026-10-12 21:49:12

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1997-11-13
Expires	2026-12-31 (70d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

45ms

49ms

46ms

AAAA

38ms

TXT

140ms

CAA

57ms

HTTPS

43ms

TLSA

104ms

SOA

42ms

MTA-STS

74ms

DNSSEC

103ms

SRV

67ms

Total

638ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 19:24:24	871ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-30 19:09:07	714ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 03:39:08	681ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-11 22:51:07	995ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-11 22:53:59	4517ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-18 05:08:57	3268ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-12 12:34:39	830ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-01 23:53:15 shown	638ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 01:32:08	387ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 01:21:24	508ms	2 NS 1 A 1 MX	🔒 Secure