e-courses.cz - robtex.com
e-courses.cz
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=1777303035 | ||||||
Same first word
e-courses.edu.pl |
e-courses.fr |
e-courses.gr |
e-courses.net |
e-courses.cz |
e-courses.cn |
e-courses.com |
e-courses.eu |
Similar names
se-source.com |
e-sources.com |
os-secure.eu |
secure-os.com |
e-sources.de |
so-secure.fr |
e-sources.co.uk |
source-es.com |
DNS History
12 records (6 active, 6 former)
○NSns.gransy.com2015-07-14 → 2015-11-20 · 4 obs
● 2015-11-20 06:49:26
○ 2016-02-26 19:00:46
○ 2026-04-27 16:07:32
●NSns1.web4ce.cz2026-04-14 → 2026-04-27 · 3 obs
● 2026-04-14 13:32:46
● 2026-04-27 16:07:32
○NSns2.gransy.com2015-07-14 → 2015-11-20 · 4 obs
● 2015-11-20 06:49:26
○ 2016-02-26 19:00:46
○ 2026-04-27 16:07:32
●NSns2.web4ce.cz2026-04-14 → 2026-04-27 · 3 obs
● 2026-04-14 13:32:46
● 2026-04-27 16:07:32
○NSns3.gransy.com2015-07-14 → 2015-11-20 · 4 obs
● 2015-11-20 06:49:26
○ 2016-02-26 19:00:46
○ 2026-04-27 16:07:32
○NSns4.gransy.com2015-07-14 → 2015-11-20 · 4 obs
● 2015-11-20 06:49:26
○ 2016-02-26 19:00:46
○ 2026-04-27 16:07:32
○NSns5.gransy.com2015-07-14 → 2015-11-20 · 4 obs
● 2015-11-20 06:49:26
○ 2016-02-26 19:00:46
○ 2026-04-27 16:07:32
○A52.28.97.2112015-07-14 → 2015-11-20 · 4 obs
● 2015-11-20 06:49:26
○ 2016-02-26 19:00:46
○ 2026-04-27 16:07:32
●A93.190.48.152026-04-14 → 2026-04-27 · 3 obs
● 2026-04-14 13:32:46
● 2026-04-27 16:07:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| e-courses.cz | ns1.web4ce.cz, ns2.web4ce.cz | 2 records |
✅ Authoritative Response
Server:93.190.49.250
NS records: ns1.web4ce.cz, ns2.web4ce.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for e-courses.cz (unsigned zone)
⏱️ Timing
Total: 1051ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 93.190.48.15 |
| NS | 2 | ns1.web4ce.cz, ns2.web4ce.cz |
| MX | 3 | mx1.web4ce.cz (pri: 10), mx2.web4ce.cz (pri: 10)... |
| TXT | 1 | v=spf1 mx include:spf.web4ce.cz -all |
| SOA | 1 | ns1.web4ce.cz domeny.web4ce.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.web4ce.cz, ns2.web4ce.cz)
Analysis
IP Addresses
e-courses.cz resolves to one IP number: 93.190.48.15.
other host names including ucitel-in.cz, smehyl.eu, moodle-trebesin.cz, litnea.cz and chraska.eu share IP numbers with e-courses.cz.
Name Servers
e-courses.cz is delegated to two name servers ns1.web4ce.cz and ns2.web4ce.cz.
e-courses.cz shares the same name server setup as other domains, for instance otte.cz, edutip.cz, euroinstitut.eu, danar.cz and svds.cz.
Host names with two IP numbers:
The host name ns1.web4ce.cz points to 2a02:c600:0:4::1 and 93.190.48.250; the host name ns2.web4ce.cz points to 2a02:c600:0:4::2 and 93.190.49.250.
Mail Servers
e-courses.cz is handled by three mail servers: mx1.web4ce.cz, mx2.web4ce.cz and mx3.web4ce.cz.
e-courses.cz shares some mail servers with other domains, at least partially, for instance hokejunicov.cz, sefl.eu, tenten.cz, laika.cz and zyka.net.
Host names with three IP numbers:
mx1.web4ce.cz points to: 93.190.48.73, 93.190.48.74 and 93.190.48.75.
mx2.web4ce.cz points to: 93.190.48.73, 93.190.48.74 and 93.190.48.75.
mx3.web4ce.cz points to: 93.190.48.73, 93.190.48.74 and 93.190.48.75.
Names pointing to 93.190.48.73: mx1.web4ce.cz, mx2.web4ce.cz and mx3.web4ce.cz.
Names pointing to 93.190.48.74: mx1.web4ce.cz, mx2.web4ce.cz and mx3.web4ce.cz.
Names pointing to 93.190.48.75: mx1.web4ce.cz, mx2.web4ce.cz and mx3.web4ce.cz.