`use09.vas-server.cz`

DNSSEC	⚠️ Not signed
A	2a01:28:ca:112::1:903^{🇨🇿 SuperNetwork2a01:28::/32 s.r.o.}
		PTR	`use09.vas-server.cz`
A	37.235.102.137^{🇨🇿 SuperNetwork37.235.96.0/20 s.r.o.}
TXT	`v=spf1 a -all`

`vas-server.cz`

	DNSSEC	🔒 Signed (DS record present)
	A	2a01:28:ca:112::1:109^{🇨🇿 SuperNetwork2a01:28::/32 s.r.o.}
	A	37.235.104.9^{🇨🇿 SuperNetwork37.235.96.0/20 s.r.o.}
	NS	`ns.vas-hosting.cz` ⭐
	NS	`ns.vas-hosting.com`
	NS	`ns.vas-hosting.eu`
	MX	`mail.vas-hosting.cz` ⭐
	TXT	`v=spf1 a -all`
	SOA	`ns.vas-hosting.cz`info@vas-hosting.cz serial=2604042215

📈 Tranco rank: #83,807

PTR for

3.0.9.0.1.0.0.0.0.0.0.0.0.0.0.0.2.1.1.0.a.c.0.0.8.2.0.0.1.0.a.2.ip6.arpa

137.102.235.37.in-addr.arpa

MX for

noark-schools.com

DNS History

2 records (2 active, 0 former)

●A2a01:28:ca:112::1:9032026-03-26 → 2026-04-04 · 2 obs

● 2026-03-26 11:52:08
● 2026-04-04 22:07:50

●A37.235.102.1372026-03-26 → 2026-04-04 · 2 obs

● 2026-03-26 11:52:08
● 2026-04-04 22:07:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
vas-server.cz	ns.vas-hosting.cz, ns.vas-hosting.eu, ns.vas-hosting.com	1 record

✅ Authoritative Response

Server:78.47.104.13

NS records: ns.vas-hosting.cz, ns.vas-hosting.eu, ns.vas-hosting.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1502ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.235.102.137`
AAAA	1	`2a01:28:ca:112::1:903`
TXT	1	`v=spf1 a -all`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns.vas-hosting.cz)

Analysis

Mail Server Role

use09.vas-server.cz serves as the mail server for noark-schools.com.

IP Addresses

use09.vas-server.cz points to two IP numbers: 2a01:28:ca:112::1:903 and 37.235.102.137.

use09.vas-server.cz - robtex.com