4dgroup.cz - robtex.com
4dgroup.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=1774543637 | ||||||
Subdomains
Same first word
Similar names
DNS History
16 records (7 active, 9 former)
○NSalfa.ns.active24.cz2015-07-03 → 2018-11-05 · 4 obs
● 2018-11-05 00:19:56
○ 2026-02-20 18:15:12
○ 2026-03-26 17:07:18
○NSbeta.ns.active24.cz2015-07-03 → 2018-11-05 · 4 obs
● 2018-11-05 00:19:56
○ 2026-02-20 18:15:12
○ 2026-03-26 17:07:18
○NSgama.ns.active24.sk2015-07-03 → 2018-11-05 · 4 obs
● 2018-11-05 00:19:56
○ 2026-02-20 18:15:12
○ 2026-03-26 17:07:18
●NSns1.websupport.cz2026-02-20 → 2026-03-26 · 3 obs
● 2026-02-20 18:15:12
● 2026-03-26 17:07:18
●NSns2.websupport.cz2026-02-20 → 2026-03-26 · 3 obs
● 2026-02-20 18:15:12
● 2026-03-26 17:07:18
●NSns3.websupport.eu2026-02-20 → 2026-03-26 · 3 obs
● 2026-02-20 18:15:12
● 2026-03-26 17:07:18
●MXmailin1.4dgroup.cz2026-02-20 → 2026-03-26 · 3 obs
● 2026-02-20 18:15:12
● 2026-03-26 17:07:18
●MXmailin2.4dgroup.cz2026-02-20 → 2026-03-26 · 3 obs
● 2026-02-20 18:15:12
● 2026-03-26 17:07:18
○MXmtx1.mbn1.net2015-07-03 → 2015-11-07 · 4 obs
● 2015-11-07 04:30:30
○ 2016-01-25 06:29:54
○ 2026-03-26 17:07:18
○MXmtx2.mbn1.net2015-07-03 → 2015-11-07 · 4 obs
● 2015-11-07 04:30:30
○ 2016-01-25 06:29:54
○ 2026-03-26 17:07:18
○MXmtx3.mbn1.net2015-07-03 → 2015-11-07 · 4 obs
● 2015-11-07 04:30:30
○ 2016-01-25 06:29:54
○ 2026-03-26 17:07:18
○MXmx1.active24.com2016-01-25 → 2018-11-05 · 5 obs
● 2016-01-25 06:29:54
● 2018-11-05 00:19:56
○ 2026-02-20 18:15:12
○ 2026-03-26 17:07:18
○MXmx2.active24.com2016-01-25 → 2018-11-05 · 5 obs
● 2016-01-25 06:29:54
● 2018-11-05 00:19:56
○ 2026-02-20 18:15:12
○ 2026-03-26 17:07:18
○A213.188.130.1442015-07-03 → 2016-01-25 · 4 obs
● 2016-01-25 06:29:54
○ 2016-04-20 10:43:26
○ 2026-03-26 17:07:18
●A2a02:2b88:1:4::922016-04-20 → 2026-03-26 · 3 obs
● 2016-04-20 10:43:26
● 2026-03-26 17:07:18
●A46.28.106.262016-04-20 → 2026-03-26 · 3 obs
● 2016-04-20 10:43:26
● 2026-03-26 17:07:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| 4dgroup.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.11
NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 952ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 46.28.106.26 |
| AAAA | 1 | 2a02:2b88:1:4::92 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 2 | mailin1.4dgroup.cz (pri: 10), mailin2.4dgroup.cz (pri: 100) |
| TXT | 1 | v=spf1 a mx include:sparkpostmail.com in |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
Hierarchy
4dgroup.cz is the parent of mailin1.4dgroup.cz and mailin2.4dgroup.cz.
IP Addresses
4dgroup.cz resolves to two IP numbers: 2a02:2b88:1:4::92 and 46.28.106.26.
Other host names, for instance pride-cz.com, psicho.cz, farmanazazitky.cz, syncos.cz and www.babykoutek.cz share IP numbers with 4dgroup.cz.
Name Servers
4dgroup.cz delegates to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
4dgroup.cz shares some name servers with other domains, for example bugsysbar.com, leram.cz, ecoair.cz, albertcesko.cz and portage.cz.
These name servers are commonly used together with ns1.websupport.sk and ns2.websupport.sk.
Host names with two IP numbers:
ns1.websupport.cz: 2a10:bbc0::11 and 45.10.97.11
ns2.websupport.cz: 2a02:250:3::12 and 185.71.159.12
ns3.websupport.eu: 2a10:bbc0::13 and 45.10.97.13
Mail Servers
4dgroup.cz is served by two mail servers: mailin1.4dgroup.cz and mailin2.4dgroup.cz.
Host names with two IP numbers:
mailin1.4dgroup.cz points to: 2a00:4b40:aaaa:2101:45:13:137:9 and 45.13.137.111; mailin2.4dgroup.cz points to: 2a00:4b40:aaaa:2101:45:13:137:105 and 45.13.137.9.