`osbd-dc.cz`

DNSSEC	🔒 Signed (DS record present)
A	34.141.29.130^{🇩🇪 Google34.141.16.0/20}
		PTR	`130.29.141.34.bc.googleusercontent.com`
NS	`ns1.websupport.cz` ⭐
		A	2a10:bbc0::11^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns1.websupport.eu`
		A	45.10.97.11^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns1.websupport.eu`
NS	`ns2.websupport.cz`
		A	2a02:250:3::12^{🇸🇪 ACTIVE24-AS2a02:250:3::/48}
			PTR	`ns2.websupport.eu`
		A	185.71.159.12^{🇸🇪 ACTIVE24-AS185.71.159.0/24}
			PTR	`ns2.websupport.eu`
NS	`ns3.websupport.eu`
		A	2a10:bbc0::13^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns3.websupport.eu`
		A	45.10.97.13^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns3.websupport.eu`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c0b::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bj-in-f27.1e100.net`
		A	142.251.163.26^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.27^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f27.1e100.net`
TXT	`google-site-verification=qxW6WU5IVPwvoBLwzwNa3WatyziqSt8fhoK4r6Q1bD8`
SOA	`ns1.websupport.cz`admin@websupport.cz serial=1760532332

`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=1784497642

Subdomains

dcjlin.osbd-dc.cz

Same first word

osbd-dc.cz

DNS History

15 records (9 active, 6 former)

○NSalfa.ns.active24.cz2015-04-28 → 2017-12-14 · 4 obs

● 2015-04-28 03:55:08
● 2017-12-14 19:02:08
○ 2026-02-25 04:08:38
○ 2026-07-19 22:07:58

○NSbeta.ns.active24.cz2015-04-28 → 2017-12-14 · 4 obs

● 2015-04-28 03:55:08
● 2017-12-14 19:02:08
○ 2026-02-25 04:08:38
○ 2026-07-19 22:07:58

○NSgama.ns.active24.sk2015-04-28 → 2017-12-14 · 4 obs

● 2015-04-28 03:55:08
● 2017-12-14 19:02:08
○ 2026-02-25 04:08:38
○ 2026-07-19 22:07:58

●NSns1.websupport.cz2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●NSns2.websupport.cz2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●NSns3.websupport.eu2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●MXalt1.aspmx.l.google.com2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●MXalt2.aspmx.l.google.com2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●MXalt3.aspmx.l.google.com2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●MXalt4.aspmx.l.google.com2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

●MXaspmx.l.google.com2026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

○MXdcjlin.osbd-dc.cz2015-04-28 → 2017-12-14 · 4 obs

● 2015-04-28 03:55:08
● 2017-12-14 19:02:08
○ 2026-02-25 04:08:38
○ 2026-07-19 22:07:58

○MXmail.innopia.eu2015-04-28 → 2017-12-14 · 4 obs

● 2015-04-28 03:55:08
● 2017-12-14 19:02:08
○ 2026-02-25 04:08:38
○ 2026-07-19 22:07:58

●A34.141.29.1302026-02-25 → 2026-07-19 · 3 obs

○ 2017-12-14 19:02:08
● 2026-02-25 04:08:38
● 2026-07-19 22:07:58

○A77.95.41.1852015-04-28 → 2017-12-14 · 4 obs

● 2015-04-28 03:55:08
● 2017-12-14 19:02:08
○ 2026-02-25 04:08:38
○ 2026-07-19 22:07:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
osbd-dc.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: 898ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`34.141.29.130`
NS	3	`ns1.websupport.cz, ns2.websupport.cz...`
MX	5	`aspmx.l.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 5)...`
TXT	1	`google-site-verification=qxW6WU5IVPwvoBL`
SOA	1	`ns1.websupport.cz admin.websupport.cz`

Analysis

Hierarchy

osbd-dc.cz is a parent domain of dcjlin.osbd-dc.cz.

IP Addresses

osbd-dc.cz points to a single IP number: 34.141.29.130.

web.innopia.cz, osbd-decin.cz and 130.29.141.34.bc.googleusercontent.com are examples of other host names that share IP numbers with osbd-dc.cz.

Name Servers

osbd-dc.cz is delegated to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.

osbd-dc.cz shares at least some of its name servers with other domains, including zepiko.eu, concepto.cz, salter.cz and two others.

These name servers are frequently paired with the name servers ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.

ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu each resolve to two IP addresses: ns1.websupport.cz resolves to 45.10.97.11 and 2a10:bbc0::11; ns2.websupport.cz resolves to 185.71.159.12 and 2a02:250:3::12; ns3.websupport.eu resolves to 45.10.97.13 and 2a10:bbc0::13.

Mail Servers

osbd-dc.cz is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

osbd-dc.cz shares mail servers — at least in part — with other domains, including linuxace.com, nebulous.cloud, agkaliaygeias.gr and two others.

These mail servers are frequently paired with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com.

Host names with two IP numbers:

aspmx.l.google.com points to 142.251.163.26 and 2607:f8b0:4004:c0b::1b.

alt1.aspmx.l.google.com points to 108.177.123.27 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com points to 172.253.116.26 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com points to 192.178.223.26 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com points to 172.253.157.27 and 2a00:1450:400c:c23::1a.