`sbdevelopment.cz`

DNSSEC	🔒 Signed (DS record present)
A	2a00:4b40:aaaa:2011::5^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
A	37.9.175.212^{🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24}
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	`mailin1.sbdevelopment.cz` ⭐
		A	2a00:4b40:aaaa:2101:45:13:137:110^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
			PTR	`mx10.websupport.sk`
		A	45.13.137.112^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`m1-u5-mx.websupport.hu`
MX	`mailin2.sbdevelopment.cz`⁽¹⁰⁰⁾
		A	2a00:4b40:aaaa:2101:45:13:137:103^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
			PTR	`mx10.websupport.cz`
		A	45.13.137.109^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`m1-u5-mx.websupport.sk`
SOA	`ns1.websupport.cz`admin@websupport.cz serial=1764285308

`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=1774399635

Subdomains

mailin2.sbdevelopment.cz

mailin1.sbdevelopment.cz

Same first word

sbdevelopment.com

sbdevelopment.cz

sbdevelopment.se

Similar names

bsdevelopment.org

bsdevelopment.ru

DNS History

14 records (7 active, 7 former)

○NSalfa.ns.active24.cz2015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

○NSbeta.ns.active24.cz2015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

○NSgama.ns.active24.sk2015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

●NSns1.websupport.cz2026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

●NSns2.websupport.cz2026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

●NSns3.websupport.eu2026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

○MXin.smtp.cz2015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

●MXmailin1.sbdevelopment.cz2026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

●MXmailin2.sbdevelopment.cz2026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

○MXmx.smtp.cz2015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

●A2a00:4b40:aaaa:2011::52026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

○A2a02:4a8:ac24:108::96:1482015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

●A37.9.175.2122026-03-12 → 2026-03-25 · 3 obs

○ 2016-07-14 21:00:36
● 2026-03-12 14:41:42
● 2026-03-25 01:05:26

○A81.95.96.1482015-08-18 → 2016-07-14 · 4 obs

● 2015-08-18 04:41:32
● 2016-07-14 21:00:36
○ 2026-03-12 14:41:42
○ 2026-03-25 01:05:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	8 records
sbdevelopment.cz	ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu	-

✅ Authoritative Response

Server:185.71.159.12

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: 960ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.9.175.212`
AAAA	1	`2a00:4b40:aaaa:2011::5`
NS	3	`ns1.websupport.cz, ns2.websupport.cz...`
MX	2	`mailin1.sbdevelopment.cz (pri: 10), mailin2.sbdevelopment.cz (pri: 100)`
SOA	1	`ns1.websupport.cz admin.websupport.cz`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz...)

Analysis

Hierarchy

sbdevelopment.cz is parent of mailin2.sbdevelopment.cz and mailin1.sbdevelopment.cz.

IP Addresses

sbdevelopment.cz resolves to two IPs: 2a00:4b40:aaaa:2011::5 and 37.9.175.212.

other host names for instance castrool.com, kachna.net, zbanek.cz, www.g5plus.cz and pazdera.eu share IP numbers with sbdevelopment.cz.

Name Servers

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

sbdevelopment.cz at least partially shares name servers with other domains, for instance optimaalpensioen.com, levity.cz, stkuh.cz, stinker.cz and vos-sosmost.cz.

These name servers are commonly used with ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.

Host names with two IP numbers:

Host ns1.websupport.cz points to 2a10:bbc0::11 and 45.10.97.11.

Host ns2.websupport.cz points to 2a02:250:3::12 and 185.71.159.12.

Host ns3.websupport.eu points to 2a10:bbc0::13 and 45.10.97.13.

Mail Servers

sbdevelopment.cz is handled by two mail servers: mailin1.sbdevelopment.cz and mailin2.sbdevelopment.cz.

Host names with two IP numbers:

mailin1.sbdevelopment.cz points to 2a00:4b40:aaaa:2101:45:13:137:110 and 45.13.137.112

mailin2.sbdevelopment.cz points to 2a00:4b40:aaaa:2101:45:13:137:103 and 45.13.137.109

sbdevelopment.cz - robtex.com