`rtb-dso.cz`

DNSSEC	🔒 Signed (DS record present)
A	2a00:d940:0:3::200^{🇨🇿 OptoNet-AS2a00:d940::/32 CZ-OPTONET-IPv6_20120412}
		PTR	`webhouse.cz`
A	78.156.158.200^{🇨🇿 OptoNet-AS78.156.128.0/19 CZ-OPTONET-20070816}
NS	`ns1.webhouse.cz` ⭐
		A	2a00:d940:0:3::210^{🇨🇿 OptoNet-AS2a00:d940::/32 CZ-OPTONET-IPv6_20120412}
			PTR	`webhouse.cz`
			PTR	`mail.webhouse.cz`
		A	78.156.158.210^{🇨🇿 OptoNet-AS78.156.128.0/19 CZ-OPTONET-20070816}
			PTR	`mail.webhouse.cz`
NS	`ns2.webhouse.cz`
		A	2a00:d940:0:3::84^{🇨🇿 OptoNet-AS2a00:d940::/32 CZ-OPTONET-IPv6_20120412}
			PTR	`cd.webhouse.cz`
		A	78.156.158.84^{🇨🇿 OptoNet-AS78.156.128.0/19 CZ-OPTONET-20070816}
			PTR	`cd.webhouse.cz`
TXT	`google-site-verification=0MJHnOaSymThsQK3bjoawFLKZY58HMGNXCUux8AF5Jk`
SOA	`ns1.webhouse.cz`hostmaster@webhouse.cz 2008-11-12 #97

`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=1778458901

Subdomains

www.rtb-dso.cz

Same first word

rtb-dso.cz

DNS History

5 records (4 active, 1 former)

●NSns1.webhouse.cz2015-08-16 → 2026-05-11 · 2 obs

● 2015-08-16 09:09:56
● 2026-05-11 00:59:10

●NSns2.webhouse.cz2015-08-16 → 2026-05-11 · 2 obs

● 2015-08-16 09:09:56
● 2026-05-11 00:59:10

●A2a00:d940:0:3::2002026-02-21 → 2026-05-11 · 3 obs

○ 2020-01-18 03:42:00
● 2026-02-21 20:37:04
● 2026-05-11 00:59:10

●A78.156.158.2002026-02-21 → 2026-05-11 · 3 obs

○ 2020-01-18 03:42:00
● 2026-02-21 20:37:04
● 2026-05-11 00:59:10

○A78.156.158.722015-08-16 → 2020-01-18 · 4 obs

● 2015-08-16 09:09:56
● 2020-01-18 03:42:00
○ 2026-02-21 20:37:04
○ 2026-05-11 00:59:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	b.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz	-
rtb-dso.cz	ns1.webhouse.cz, ns2.webhouse.cz	2 records

✅ Authoritative Response

Server:78.156.158.84

NS records: ns1.webhouse.cz, ns2.webhouse.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1458ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`78.156.158.200`
AAAA	1	`2a00:d940:0:3::200`
NS	2	`ns2.webhouse.cz, ns1.webhouse.cz`
TXT	1	`google-site-verification=0MJHnOaSymThsQK`
SOA	1	`ns1.webhouse.cz hostmaster.webhouse.cz`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.webhouse.cz, ns2.webhouse.cz)

Analysis

Hierarchy

rtb-dso.cz is the parent of www.rtb-dso.cz.

IP Addresses

rtb-dso.cz points to two IPs: 2a00:d940:0:3::200 and 78.156.158.200.

Other host names including novaves-bv.cz, teplice.cz, usobi.cz, www.kutnahora.cz and malec.cz share IP numbers with rtb-dso.cz.

Name Servers

rtb-dso.cz's delegation uses two name servers, ns1.webhouse.cz and ns2.webhouse.cz.

rtb-dso.cz shares the same name server setup as other domains, for example sdhvycapy.cz, znojmocity.cz, obec-lesna.com, obec-kosatky.cz and libotenice.cz.

Host names with two IPs:

ns1.webhouse.cz points to: 2a00:d940:0:3::210 and 78.156.158.210

ns2.webhouse.cz points to: 2a00:d940:0:3::84 and 78.156.158.84

rtb-dso.cz - robtex.com

rtb-dso.cz

cz