`jmj-unit.com`

DNSSEC	⚠️ Not signed
NS	`ns2.web4u.cz` ⭐
		A	2a02:a40:100:28ff::12^{🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U185.14.224.0/23}
			PTR	`ns.web4u.cz`
MX	`mail.jmj-unit.com` ⭐
		A	2001:1568:f::386^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`vs386.server4u.cz`
		A	81.91.85.195^{🇨🇿 WEB4U81.91.80.0/21}
			PTR	`vs386.server4u.cz`
MX	`posta.jmj-unit.com`⁽⁹⁹⁾
		A	85.163.103.239^{🇨🇿 CETIN-AS85.163.0.0/16 CETIN}
TXT	`v=spf1 mx a:vs386.server4u.cz ip4:217.170.106.190 all`
SOA	`ns.web4u.cz`admin@web4u.cz 2025-12-09 #0

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1778714291

Subdomains

mail.jmj-unit.com

posta.jmj-unit.com

Same first word

jmj-unit.com

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, a.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net...	-
jmj-unit.com	ns.web4u.cz, ns2.web4u.cz	-

✅ Authoritative Response

Server:85.207.53.12

NS records: ns.web4u.cz, ns2.web4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jmj-unit.com (unsigned zone)

⏱️ Timing

Total: 3243ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	2	`mail.jmj-unit.com (pri: 10), posta.jmj-unit.com (pri: 99)`
TXT	1	`v=spf1 mx a:vs386.server4u.cz ip4:217.17`
SOA	1	`ns.web4u.cz admin.web4u.cz`

Analysis

Hierarchy

jmj-unit.com is parent of mail.jmj-unit.com and posta.jmj-unit.com.

Name Servers

jmj-unit.com is delegated to two name servers: ns2.web4u.cz and ns.web4u.cz.

jmj-unit.com shares the same name server setup as other domains, for example chilan.eu, okna-express.cz, medicemgroup.cz, budoar.cz and muscle-sport.cz.

jmj-unit.com at least partially shares its name servers with other domains, for instance www.fairtom.com.

Host names with two IP numbers:

ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12

ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241

Mail Servers

jmj-unit.com is handled by two mail servers: mail.jmj-unit.com and posta.jmj-unit.com.

Host names with two IP numbers: mail.jmj-unit.com points to 2001:1568:f::386 and 81.91.85.195.

Host names with one IP number: posta.jmj-unit.com points to 85.163.103.239.

jmj-unit.com - robtex.com

jmj-unit.com

com