`jbcsystem.cz`

DNSSEC	⚠️ Not signed
A	93.185.97.167^{🇨🇿 VSHOSTING93.185.96.0/20 II.}
		PTR	`brno.weby.cz`
NS	`ns.winet.cz` ⭐
		A	93.185.97.169^{🇨🇿 VSHOSTING93.185.96.0/20 II.}
			PTR	`ns.winet.cz`
NS	`nt.winet.cz`
		A	217.16.185.83^{🇨🇿 VSHOSTING217.16.176.0/20 III.}
			PTR	`nt.winet.cz`
MX	`mx.weby.cz` ⭐
		A	93.185.97.186^{🇨🇿 VSHOSTING93.185.96.0/20 II.}
			PTR	`mail3.weby.cz`
TXT	`v=spf1 a mx ip4:93.185.97.160/27 ip4:217.16.185.0/24 -all`
SOA	`ns.winet.cz`administrator@winet.cz serial=1445693963

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1775963834

Subdomains

mx.jbcsystem.cz

Same first word

jbcsystem.cz

DNS History

8 records (4 active, 4 former)

●NSns.winet.cz2015-06-30 → 2026-04-12 · 2 obs

● 2015-06-30 03:11:10
● 2026-04-12 03:47:54

●NSnt.winet.cz2015-06-30 → 2026-04-12 · 2 obs

● 2015-06-30 03:11:10
● 2026-04-12 03:47:54

○MXmx.jbcsystem.cz2015-06-30 → 2015-06-30 · 3 obs

● 2015-06-30 03:11:10
○ 2015-11-08 10:10:56
○ 2026-04-12 03:47:54

●MXmx.weby.cz2015-11-08 → 2026-04-12 · 3 obs

○ 2015-06-30 03:11:10
● 2015-11-08 10:10:56
● 2026-04-12 03:47:54

○MXmx2.jbcsystem.cz2015-06-30 → 2015-06-30 · 3 obs

● 2015-06-30 03:11:10
○ 2015-11-08 10:10:56
○ 2026-04-12 03:47:54

○MXmx2.weby.cz2015-11-08 → 2017-08-08 · 5 obs

○ 2015-06-30 03:11:10
● 2015-11-08 10:10:56
● 2017-08-08 11:56:20
○ 2026-02-26 16:07:10
○ 2026-04-12 03:47:54

○A80.79.21.602015-06-30 → 2017-08-08 · 4 obs

● 2015-06-30 03:11:10
● 2017-08-08 11:56:20
○ 2026-02-26 16:07:10
○ 2026-04-12 03:47:54

●A93.185.97.1672026-02-26 → 2026-04-12 · 3 obs

○ 2017-08-08 11:56:20
● 2026-02-26 16:07:10
● 2026-04-12 03:47:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz, c.ns.nic.cz	8 records
jbcsystem.cz	ns.winet.cz, nt.winet.cz	2 records

✅ Authoritative Response

Server:217.16.185.83

NS records: ns.winet.cz, nt.winet.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jbcsystem.cz (unsigned zone)

⏱️ Timing

Total: 963ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`93.185.97.167`
NS	2	`nt.winet.cz, ns.winet.cz`
MX	1	`mx.weby.cz (pri: 10)`
TXT	1	`v=spf1 a mx ip4:93.185.97.160/27 ip4:217`
SOA	1	`ns.winet.cz administrator.winet.cz`

📌 Glue Records Collected

Total: 10

In-bailiwick: 8 (a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz...)

Out-of-bailiwick: 2 (nt.winet.cz, ns.winet.cz)

Analysis

Hierarchy

jbcsystem.cz is a parent of mx.jbcsystem.cz.

IP Addresses

jbcsystem.cz points to a single IP number: 93.185.97.167.

Other host names, for instance medista.net, medista.info, lgo.cz, agroten.cz and www.avitrade.cz share IP numbers with jbcsystem.cz.

Name Servers

Delegation for jbcsystem.cz rests with two name servers, ns.winet.cz and nt.winet.cz.

jbcsystem.cz shares the same name server setup as other domains, including iso-ems.cz, gumarny.eu, romus.cz, ok-tourism.eu and avitrade.cz.

jbcsystem.cz at least partially shares name servers with other domains, for instance praslavice.cz, sledovanipaliva.cz, infoa.sk, allu.cz and gumarny.cz.

These name servers are commonly used with the name servers kampa2.weby.cz.

Host names with one IP number: ns.winet.cz points to 93.185.97.169; nt.winet.cz points to 217.16.185.83.

Mail Servers

jbcsystem.cz is handled by a single mail server, mx.weby.cz.

jbcsystem.cz uses the same mail server configuration as other domains, such as praslavice.cz, omacz.cz, studnyolomouc.cz, medista.net and weby.cz.

jbcsystem.cz shares mail servers with other domains at least in part, for instance libido.cz, oloprakt.cz, realityzvonek.com, audor.cz and alfacollect.cz.

These mail servers are often used together with the mail servers mx2.weby.cz.

mx.weby.cz points to a single IP: 93.185.97.186.

jbcsystem.cz - robtex.com

jbcsystem.cz

cz