stringdata.cz - dns.ninja

`stringdata.cz`

DNSSEC	⚠️ Not signed
A	212.158.143.73^{🇨🇿 BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block}
NS	`ns2.sdserver.cz` ⭐
		A	212.158.143.16^{🇨🇿 BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block}
NS	`ns.sdserver.cz` ⚠️ Not in parent delegation
		A	212.158.143.10^{🇨🇿 BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block}
NS	`ns3.sdserver.cz`
		A	84.244.96.162^{🇨🇿 BlueTone-AS84.244.64.0/18 BlueTone-CRa-CZ Third address block}
NS	`ns4.sdserver.cz`
MX	`stringdata-cz.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::1^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::2^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-du2pr03cu00102.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::4^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am0pr04cu00504.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::b^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00103.inbound.protection.outlook.com`
		A	52.101.68.39^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00607.inbound.protection.outlook.com`
		A	52.101.73.16^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
		A	52.101.73.26^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr05cu01302.inbound.protection.outlook.com`
		A	52.101.73.30^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am7pr05cu00306.inbound.protection.outlook.com`
TXT	`MS=ms94482049`
TXT	`google-site-verification=Eh4-zQnRooeoiPlFI-Jlyw0APG8ddxn71os3Kv2Zp5k`
TXT	`google-site-verification=mram3YxqdbkzZvOrC5aGFVqjKCkqSDMZUdQyTMvBf1Y`
TXT	`openai-domain-verification=dv-OTyAhNcHCInBsSb65Kbc4bvE`
TXT	`v=spf1 mx a ip4:212.158.143.0/25 ip4:84.244.96.128/26 a:sdmail.sdserver.cz a:...`
TXT	`google-site-verification=3Ovy9VbSti6OgPfZDwt-F7P4ZhtWRPoHRJJTWLzJ60E`
SOA	`ns.sdserver.cz`dns-admin@stringdata.cz 2026-05-29 #2

`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=1781837238

Subdomains

dpo-demo.stringdata.cz

www.stringdata.cz

helpdesk.stringdata.cz

linde.stringdata.cz

meeting.stringdata.cz

moneta-hypos.stringdata.cz

mail.stringdata.cz

Same first word

stringdata.org

stringdata.eu

stringdata.info

stringdata.net

stringdata.cz

stringdata.sk

stringdata.com

Similar names

DNS History

12 records (6 active, 6 former)

●NSns.sdserver.cz2026-03-01 → 2026-06-19 · 3 obs

○ 2016-11-27 13:28:30
● 2026-03-01 03:54:46
● 2026-06-19 02:59:38

○NSns1.sdserver.cz2008-12-09 → 2016-11-27 · 4 obs

● 2008-12-09 12:36:08
● 2016-11-27 13:28:30
○ 2026-03-01 03:54:46
○ 2026-06-19 02:59:38

●NSns2.sdserver.cz2008-12-09 → 2026-06-19 · 2 obs

● 2008-12-09 12:36:08
● 2026-06-19 02:59:38

●NSns3.sdserver.cz2008-12-09 → 2026-06-19 · 2 obs

● 2008-12-09 12:36:08
● 2026-06-19 02:59:38

●NSns4.sdserver.cz2008-12-09 → 2026-06-19 · 2 obs

● 2008-12-09 12:36:08
● 2026-06-19 02:59:38

○NSsrv1.sdserver.cz2015-07-01 → 2016-11-27 · 5 obs

○ 2008-12-09 12:36:08
● 2015-07-01 10:03:36
● 2016-11-27 13:28:30
○ 2026-03-01 03:54:46
○ 2026-06-19 02:59:38

○MXmail2.sdserver.cz2008-12-09 → 2016-11-27 · 4 obs

● 2008-12-09 12:36:08
● 2016-11-27 13:28:30
○ 2026-03-01 03:54:46
○ 2026-06-19 02:59:38

○MXsdmail.sdserver.cz2008-12-09 → 2016-11-27 · 4 obs

● 2008-12-09 12:36:08
● 2016-11-27 13:28:30
○ 2026-03-01 03:54:46
○ 2026-06-19 02:59:38

●MXstringdata-cz.mail.protection.outlook.com2026-03-01 → 2026-06-19 · 3 obs

○ 2016-11-27 13:28:30
● 2026-03-01 03:54:46
● 2026-06-19 02:59:38

○A212.158.143.252015-07-01 → 2016-11-27 · 5 obs

○ 2008-12-09 12:36:08
● 2015-07-01 10:03:36
● 2016-11-27 13:28:30
○ 2026-03-01 03:54:46
○ 2026-06-19 02:59:38

●A212.158.143.732026-03-01 → 2026-06-19 · 3 obs

○ 2016-11-27 13:28:30
● 2026-03-01 03:54:46
● 2026-06-19 02:59:38

○A81.0.239.662008-12-09 → 2008-12-09 · 3 obs

● 2008-12-09 12:36:08
○ 2015-07-01 10:03:36
○ 2026-06-19 02:59:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
stringdata.cz	ns.sdserver.cz, ns2.sdserver.cz, ns3.sdserver.cz	3 records

✅ Authoritative Response

Server:212.158.143.16

NS records: ns.sdserver.cz, ns2.sdserver.cz, ns3.sdserver.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stringdata.cz (unsigned zone)

⏱️ Timing

Total: 1438ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`212.158.143.73`
NS	4	`ns4.sdserver.cz, ns.sdserver.cz...`
MX	1	`stringdata-cz.mail.protection.outlook.co`
TXT	6	`google-site-verification=mram3YxqdbkzZvO, v=spf1 mx a ip4:212.158.143.0/25 ip4:84....`
SOA	1	`ns.sdserver.cz dns-admin.stringdata.cz`

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (ns.sdserver.cz, ns2.sdserver.cz, ns3.sdserver.cz)

Analysis

Hierarchy

Among the subdomains of stringdata.cz are dpo-demo.stringdata.cz, www.stringdata.cz, helpdesk.stringdata.cz, linde.stringdata.cz, meeting.stringdata.cz and a few other host names.

IP Addresses

stringdata.cz resolves to one IP address: 212.158.143.73.

www.stringdata.cz, stringdata.com, sdnet.cz and two other host names share IP numbers with stringdata.cz.

Name Servers

The authoritative name servers for stringdata.cz are ns2.sdserver.cz, ns3.sdserver.cz, ns4.sdserver.cz and ns.sdserver.cz.

There is at least partial name server overlap between stringdata.cz and other domains — 0-25.143.158.212.in-addr.arpa, sdserver.cz, sdbox.cz and two more among them.

The name servers ns1.sdserver.cz, ns1.bluetone.cz and ns.bluetone.cz are often found in combination with these name servers.

Each of the three hostnames points to exactly one IP address: ns2.sdserver.cz points to 212.158.143.16, ns3.sdserver.cz points to 84.244.96.162 and ns.sdserver.cz points to 212.158.143.10.

Mail Servers

Mail for stringdata.cz is handled by a single mail server, stringdata-cz.mail.protection.outlook.com.

stringdata-cz.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.68.39, 52.101.73.16, 52.101.73.26 and 5 others.