string.cz - robtex.com
string.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 212.158.143.25🇨🇿 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 | sdmail2.sdserver.cz ⭐ | ||||||
| A | 212.158.143.88🇨🇿 BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block | ||||||
| TXT | MS=ms43141353 | ||||||
| SOA | ns.sdserver.czdns-admin@stringdata.cz 2017-10-16 #7 | ||||||
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.czhostmaster@nic.cz serial=1778341634 | ||||||
Same first word
Similar names
DNS History
11 records (6 active, 5 former)
●NSns.sdserver.cz2026-02-14 → 2026-05-09 · 3 obs
● 2026-02-14 20:41:04
● 2026-05-09 16:06:26
○NSns1.sdserver.cz2015-08-16 → 2017-02-19 · 4 obs
● 2017-02-19 00:45:38
○ 2026-02-14 20:41:04
○ 2026-05-09 16:06:26
●NSns2.sdserver.cz2015-08-16 → 2026-05-09 · 2 obs
● 2026-05-09 16:06:26
●NSns3.sdserver.cz2015-08-16 → 2026-05-09 · 2 obs
● 2026-05-09 16:06:26
●NSns4.sdserver.cz2015-08-16 → 2026-05-09 · 5 obs
● 2026-02-14 20:41:04
○ 2026-03-13 17:38:18
● 2026-03-17 16:46:52
● 2026-05-09 16:06:26
○NSsrv1.sdserver.cz2015-08-16 → 2017-02-19 · 4 obs
● 2017-02-19 00:45:38
○ 2026-02-14 20:41:04
○ 2026-05-09 16:06:26
○MXmail2.sdserver.cz2015-08-16 → 2017-02-19 · 4 obs
● 2017-02-19 00:45:38
○ 2026-02-14 20:41:04
○ 2026-05-09 16:06:26
○MXsdmail.sdserver.cz2015-08-16 → 2016-03-27 · 4 obs
● 2016-03-27 22:22:02
○ 2017-02-19 00:45:38
○ 2026-05-09 16:06:26
●MXsdmail2.sdserver.cz2017-02-19 → 2026-05-09 · 6 obs
● 2017-02-19 00:45:38
● 2026-05-06 12:01:50
○ 2026-05-08 01:04:50
● 2026-05-09 16:06:24
● 2026-05-09 16:06:26
●A212.158.143.252026-02-14 → 2026-05-09 · 3 obs
● 2026-02-14 20:41:04
● 2026-05-09 16:06:26
○A81.0.239.662015-08-16 → 2016-03-27 · 4 obs
● 2016-03-27 22:22:02
○ 2017-02-19 00:45:38
○ 2026-05-09 16:06:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | c.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz | - |
| string.cz | ns.sdserver.cz, ns2.sdserver.cz, ns3.sdserver.cz | 3 records |
✅ Authoritative Response
Server:212.158.143.10
NS records: ns.sdserver.cz, ns2.sdserver.cz, ns3.sdserver.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for string.cz (unsigned zone)
⏱️ Timing
Total: 1359ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 212.158.143.25 |
| NS | 4 | ns2.sdserver.cz, ns3.sdserver.cz... |
| TXT | 1 | MS=ms43141353 |
| 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
IP Addresses
string.cz maps to IP address 212.158.143.25.
Other host names, for instance stringdata.eu, stringdata.info, simsuite.cz, salestransformer.cz and winrobot.eu share IP numbers with string.cz.
Name Servers
string.cz is delegated to four name servers: ns2.sdserver.cz, ns3.sdserver.cz, ns4.sdserver.cz and ns.sdserver.cz.
string.cz at least partially shares name servers with other domains such as stringdata.cz, pbox.cz, stringdata.sk, 24hod.cz and stringdata.com.
These name servers are commonly used with ns1.sdserver.cz and ns1.bluetone.cz.
Host names with a single IP:
ns2.sdserver.cz points to 212.158.143.16
ns3.sdserver.cz points to 84.244.96.162
ns.sdserver.cz points to 212.158.143.10
Mail Servers
string.cz is handled by a single mail server, sdmail2.sdserver.cz.
string.cz shares mail servers with other domains, at least partially, for instance sdserver.cz, stringdata.sk, stringdata.com and ultimaterpa.com.
These mail servers are commonly used together with sdmail3.sdserver.cz and sdmail.sdserver.cz.
sdmail2.sdserver.cz points to one IP number: 212.158.143.88.