`jmj-composites.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-composites.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`
SOA	`ns.web4u.cz`admin@web4u.cz 2024-10-12 #2

`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=1778540851

Subdomains

mail.jmj-composites.com

Same first word

jmj-composites.cz

jmj-composites.com

DNS History

5 records (3 active, 2 former)

●NSns.web4u.cz2015-06-11 → 2026-05-11 · 2 obs

● 2015-06-11 05:46:24
● 2026-05-11 23:32:04

●NSns2.web4u.cz2015-06-11 → 2026-05-11 · 2 obs

● 2015-06-11 05:46:24
● 2026-05-11 23:32:04

●MXmail.jmj-composites.com2015-06-11 → 2026-05-11 · 2 obs

● 2015-06-11 05:46:24
● 2026-05-11 23:32:04

○A78.24.14.902015-06-11 → 2015-06-11 · 3 obs

● 2015-06-11 05:46:24
○ 2015-10-27 15:48:54
○ 2026-05-11 23:32:04

○A81.91.85.1952015-10-27 → 2017-12-26 · 4 obs

○ 2015-06-11 05:46:24
● 2015-10-27 15:48:54
● 2017-12-26 19:59:52
○ 2026-05-11 23:32:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, m.gtld-servers.net, h.gtld-servers.net, g.gtld-servers.net...	-
jmj-composites.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-composites.com (unsigned zone)

⏱️ Timing

Total: 791ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	1	`mail.jmj-composites.com (pri: 10)`
SOA	1	`ns.web4u.cz admin.web4u.cz`

Analysis

Hierarchy

The parent of mail.jmj-composites.com is jmj-composites.com.

Name Servers

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

jmj-composites.com shares the same name server setup as enjoyinn.cz, top50.cz, martinmarik.cz, diag4.eu and bitumax.cz.

jmj-composites.com shares some name servers with other domains, for instance feng-shui-blog.cz.

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-composites.com is handled by a single mail server, mail.jmj-composites.com.

mail.jmj-composites.com points to two IPs: 2001:1568:f::386 and 81.91.85.195.

jmj-composites.com - robtex.com