shuster.cz - robtex.com
shuster.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2001:1568::14🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php7.web4u.cz | ||||||
| A | 81.91.86.14🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mx1.mailchannels.net ⭐ | ||||||
| A | 54.69.1.140🇺🇸 Amazon54.68.0.0/15 EC2 PDX Prefix | ||||||
| PTR | ec2-54-69-1-140.us-west-2.compute.amazonaws.com | ||||||
| MX | mx2.mailchannels.net ⭐ | ||||||
| A | 18.236.29.166🇺🇸 Amazon18.236.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-18-236-29-166.us-west-2.compute.amazonaws.com | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-05-04 #0 | ||||||
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=1774507636 | ||||||
Subdomains
mail.shuster.cz |
Same first word
Similar names
hertssu.com |
suthers.com.au |
suthers.org |
thersus.com |
suthers.com |
shuters.co.za |
suthers.mobi |
husters.net |
russeth.com |
tsuresh.com |
rushtes.com |
shuters.com |
DNS History
15 records (6 active, 9 former)
○NSns.gransy.com2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
●NSns.web4u.cz2017-03-26 → 2026-03-26 · 3 obs
● 2017-03-26 05:22:12
● 2026-03-26 07:13:50
○NSns2.gransy.com2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
●NSns2.web4u.cz2017-03-26 → 2026-03-26 · 3 obs
● 2017-03-26 05:22:12
● 2026-03-26 07:13:50
○NSns3.gransy.com2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
○NSns4.gransy.com2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
○NSns5.gransy.com2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
○MXmail.klenot.cz2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
○MXmail.shuster.cz2017-03-26 → 2017-03-26 · 4 obs
● 2017-03-26 05:22:12
○ 2026-03-25 22:42:54
○ 2026-03-26 07:13:50
●MXmx1.mailchannels.net2026-03-25 → 2026-03-26 · 3 obs
● 2026-03-25 22:42:54
● 2026-03-26 07:13:50
●MXmx2.mailchannels.net2026-03-25 → 2026-03-26 · 3 obs
● 2026-03-25 22:42:54
● 2026-03-26 07:13:50
○A2001:1528:137::f2015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
●A2001:1568::142017-03-26 → 2026-03-26 · 3 obs
● 2017-03-26 05:22:12
● 2026-03-26 07:13:50
○A77.78.104.1422015-08-21 → 2016-07-07 · 4 obs
● 2016-07-07 11:55:38
○ 2017-03-26 05:22:12
○ 2026-03-26 07:13:50
●A81.91.86.142017-03-26 → 2026-03-26 · 3 obs
● 2017-03-26 05:22:12
● 2026-03-26 07:13:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | 8 records |
| shuster.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 984ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.14 |
| AAAA | 1 | 2001:1568::14 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 2 | mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 12
In-bailiwick: 8 (a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz...)
Out-of-bailiwick: 4 (ns.web4u.cz, ns2.web4u.cz, ns.web4u.cz...)
Analysis
Hierarchy
shuster.cz is the parent of mail.shuster.cz.
IP Addresses
shuster.cz resolves to two IP numbers: 2001:1568::14 and 81.91.86.14.
Other host names, for instance svetlan.cz, mail.ternocolor.cz, mailinbackup1.rezervacny-system.sk, mbsr.cz and mail.rekosan.cz share IP numbers with shuster.cz.
Name Servers
shuster.cz has two name servers: ns2.web4u.cz and ns.web4u.cz.
shuster.cz shares the same name server setup as other domains, for example pouzite-sekacky.cz, avise.cz, softtenis.cz, padluj.cz and wardwind.com.
Host names with two IP numbers:
ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12; ns.web4u.cz points to: 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
shuster.cz is served by two mail servers: mx1.mailchannels.net and mx2.mailchannels.net.
shuster.cz shares the mail server setup with other domains, for example sabby.us, neenerneener.net, pipeaway.com, seesaw.org and spearheadinv.com.
shuster.cz shares some mail servers with other domains at least partially, for instance kcracing.se and budtorose.com.
Host names with a single IP:
mx1.mailchannels.net points to 54.69.1.140
mx2.mailchannels.net points to 18.236.29.166