string.cz - dns.ninja

string.cz

DNSSECโš ๏ธ Not signed
NSns2.sdserver.cz โญ
A212.158.143.16๐Ÿ‡จ๐Ÿ‡ฟ BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block
NSns.sdserver.cz โš ๏ธ Not in parent delegation
A212.158.143.10๐Ÿ‡จ๐Ÿ‡ฟ BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block
NSns3.sdserver.cz
A84.244.96.162๐Ÿ‡จ๐Ÿ‡ฟ BlueTone-AS84.244.64.0/18 BlueTone-CRa-CZ Third address block
NSns4.sdserver.cz
MXsdmail2.sdserver.cz โญ
A212.158.143.88๐Ÿ‡จ๐Ÿ‡ฟ BlueTone-AS212.158.128.0/19 BlueTone-CRa-CZ First address block
TXTMS=ms43141353
SOAns.sdserver.czdns-admin@stringdata.cz 2017-10-16 #7

cz

DNSSEC๐Ÿ”’ Signed (DS record present)
NSa.ns.nic.cz โญ
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1785791839

Same first word

Similar names

DNS History

11 records (5 active, 6 former)

20162017201820192020202120222023202420252026NSns.sdserver.czns2.sdserver.czns3.sdserver.czns4.sdserver.czns1.sdserver.czsrv1.sdserver.czMXsdmail2.sdserver.czmail2.sdserver.czsdmail.sdserver.czA212.158.143.2581.0.239.66
โ—NSns.sdserver.cz2026-02-14 โ†’ 2026-08-03 ยท 3 obs
โ—‹ 2017-02-19 00:45:38
โ— 2026-02-14 20:41:04
โ— 2026-08-03 22:43:12
โ—‹NSns1.sdserver.cz2015-08-16 โ†’ 2017-02-19 ยท 4 obs
โ— 2015-08-16 12:34:32
โ— 2017-02-19 00:45:38
โ—‹ 2026-02-14 20:41:04
โ—‹ 2026-08-03 22:43:12
โ—NSns2.sdserver.cz2015-08-16 โ†’ 2026-08-03 ยท 2 obs
โ— 2015-08-16 12:34:32
โ— 2026-08-03 22:43:12
โ—NSns3.sdserver.cz2015-08-16 โ†’ 2026-08-03 ยท 2 obs
โ— 2015-08-16 12:34:32
โ— 2026-08-03 22:43:12
โ—NSns4.sdserver.cz2015-08-16 โ†’ 2026-08-03 ยท 10 obs
โ— 2015-08-16 12:34:32
โ— 2026-02-14 20:41:04
โ—‹ 2026-03-13 17:38:18
โ— 2026-03-17 16:46:52
โ— 2026-05-13 06:18:34
โ—‹ 2026-05-16 11:56:54
โ— 2026-06-18 23:31:44
โ—‹ 2026-08-03 12:09:16
โ— 2026-08-03 22:43:10
โ— 2026-08-03 22:43:12
โ—‹NSsrv1.sdserver.cz2015-08-16 โ†’ 2017-02-19 ยท 4 obs
โ— 2015-08-16 12:34:32
โ— 2017-02-19 00:45:38
โ—‹ 2026-02-14 20:41:04
โ—‹ 2026-08-03 22:43:12
โ—‹MXmail2.sdserver.cz2015-08-16 โ†’ 2017-02-19 ยท 4 obs
โ— 2015-08-16 12:34:32
โ— 2017-02-19 00:45:38
โ—‹ 2026-02-14 20:41:04
โ—‹ 2026-08-03 22:43:12
โ—‹MXsdmail.sdserver.cz2015-08-16 โ†’ 2016-03-27 ยท 4 obs
โ— 2015-08-16 12:34:32
โ— 2016-03-27 22:22:02
โ—‹ 2017-02-19 00:45:38
โ—‹ 2026-08-03 22:43:12
โ—MXsdmail2.sdserver.cz2017-02-19 โ†’ 2026-08-03 ยท 8 obs
โ—‹ 2016-03-27 22:22:02
โ— 2017-02-19 00:45:38
โ— 2026-05-06 12:01:50
โ—‹ 2026-05-08 01:04:50
โ— 2026-05-09 16:06:24
โ—‹ 2026-07-08 04:10:42
โ— 2026-08-03 22:43:10
โ— 2026-08-03 22:43:12
โ—‹A212.158.143.252026-02-14 โ†’ 2026-02-14 ยท 4 obs
โ—‹ 2017-02-19 00:45:38
โ— 2026-02-14 20:41:04
โ—‹ 2026-08-03 12:09:16
โ—‹ 2026-08-03 22:43:12
โ—‹A81.0.239.662015-08-16 โ†’ 2016-03-27 ยท 4 obs
โ— 2015-08-16 12:34:32
โ— 2016-03-27 22:22:02
โ—‹ 2017-02-19 00:45:38
โ—‹ 2026-08-03 22:43:12

๐Ÿ” DNS Trace

๐Ÿ“‹ Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
string.czns.sdserver.cz, ns2.sdserver.cz, ns3.sdserver.cz3 records

โœ… Authoritative Response

Server:84.244.96.162

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

๐Ÿ”’ DNSSEC Status

โš ๏ธ Insecure (no DNSSEC)

No DS record for string.cz (unsigned zone)

โฑ๏ธ Timing

Total: 763ms | Queries: -

๐Ÿ“„ Records

TypeCountSample Data
A1212.158.143.25
NS4ns.sdserver.cz, ns3.sdserver.cz...
MX1sdmail2.sdserver.cz (pri: 10)
TXT1MS=ms43141353
SOA1ns.sdserver.cz dns-admin.stringdata.cz

๐Ÿ“Œ Glue Records Collected

Total: 3

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

Analysis

Name Servers

string.cz has four authoritative name servers: ns2.sdserver.cz, ns3.sdserver.cz, ns4.sdserver.cz and ns.sdserver.cz.

There is at least partial name server overlap between string.cz and other domains โ€” stringdata.cz, pbox.cz, stringdata.sk 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.

The hostnames ns2.sdserver.cz, ns3.sdserver.cz and ns.sdserver.cz each resolve to a single IP: ns2.sdserver.cz โ†’ 212.158.143.16, ns3.sdserver.cz โ†’ 84.244.96.162, ns.sdserver.cz โ†’ 212.158.143.10.

Mail Servers

string.cz has one mail server: sdmail2.sdserver.cz.

string.cz and a number of other domains โ€” sdserver.cz, stringdata.sk, stringdata.com and ultimaterpa.com among them โ€” share at least some of the same mail servers.

These mail servers are routinely seen in conjunction with the mail servers sdmail3.sdserver.cz and sdmail.sdserver.cz.

sdmail2.sdserver.cz directs to just one IP number, 212.158.143.88.