mail.developstudio.cz - dns.ninja

`mail.developstudio.cz`

DNSSEC	⚠️ Not signed
A	2a00:4b40:aaaa:2101:45:13:137:123^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
		PTR	`m1-u7-ing.websupport.hu`
A	45.13.137.121^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}

`developstudio.cz`

	DNSSEC	⚠️ Not signed
	A	2a00:4b40:aaaa:2005::6^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
	A	37.9.175.164^{🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24}
	NS	`ns1.websupport.cz` ⭐
	NS	`ns2.websupport.cz`
	NS	`ns3.websupport.eu`
	MX	`mx10.active24.cz` ⭐
	MX	`mx20.active24.cz`⁽¹⁰⁰⁾
	TXT	`v=spf1 a mx include:_spf.websupport.cz ?all`
	TXT	`spf2.0/pra a mx include:_sid.websupport.cz ?all`
	SOA	`ns1.websupport.cz`admin@websupport.cz serial=1730038665

Previously MX for

tic-tac.cz

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DNS History

2 records (2 active, 0 former)

●A2a00:4b40:aaaa:2101:45:13:137:1232026-03-14 → 2026-07-13 · 2 obs

● 2026-03-14 00:19:34
● 2026-07-13 15:39:02

●A45.13.137.1212026-03-14 → 2026-07-13 · 2 obs

● 2026-03-14 00:19:34
● 2026-07-13 15:39:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
developstudio.cz	ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu	-

✅ Authoritative Response

Server:45.10.97.13

NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 2127ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`45.13.137.121`
AAAA	1	`2a00:4b40:aaaa:2101:45:13:137:123`

Analysis

IP Addresses

mail.developstudio.cz points to the IP addresses 45.13.137.121 and 2a00:4b40:aaaa:2101:45:13:137:123

Additional host names — mail.vaspol.cz, mail.projekt-parabelum.cz, mail.zdislavice.net and two others — share IP numbers with mail.developstudio.cz.