jcn-as.dk

📜 Historical scan 2026-09-06 20:58:02 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

jcn-as.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 26 April 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.47.247.18 is hosted by One.com A/S (AS51468). Mail is handled by mail.jcn-byggeri.dk. The zone is DNSSEC-signed and validates, publishes a 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 152ms

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 92ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.47.247.18	600s	one.com.webforward.g1i.one	AS51468	One.com A/S	195.47.247.0/24	—	—

📧 MX Records#

1 records 126ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mail.jcn-byggeri.dk	92.246.24.132	mail.jcn-byggeri.dk	AS39642 Sinal A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	195.47.247.18
🔶 Autoconfig	195.47.247.18

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 267ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (jcn-as.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.jcn-as.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:6720990da2064@dmarc-dk.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 2026-10-13 10:40:49

www CNAME	www.jcn-byggeri.dk (all on jcn-byggeri.dk) → 195.47.247.18 (AS51468)
www vs bare domain	Same network jcn-as.dk: 195.47.247.18 (AS51468) www.jcn-as.dk: 195.47.247.18 (AS51468)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

170ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026090407
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 18:05:35

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2001-04-26
Expires	2027-06-30 (250d)

📋 WHOIS#

⏱️ Lookup Timing#

152ms

92ms

126ms

AAAA

122ms

TXT

267ms

CAA

105ms

HTTPS

141ms

TLSA

151ms

SOA

0ms

MTA-STS

110ms

DNSSEC

170ms

SRV

144ms

Total

1005ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 10:40:49	621ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-12 09:11:18	1166ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-10 06:39:09	982ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 22:25:01	791ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-15 03:10:34	1226ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-06 20:58:02 shown	1005ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-20 05:29:54	6808ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-10 05:54:55	3975ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-16 09:00:55	8609ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-06 23:13:10	1212ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 22:50:54	950ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 14:46:26	1402ms	2 NS 1 A 1 MX	🔒 Secure