4wdev.cz - dns.ninja
4wdev.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 77.78.106.56🇨🇿 CASABLANCA-AS77.78.96.0/20 Casablanca INT | ||||||
| PTR | ww6.4ws.cz | ||||||
| NS | ns.forpsi.net ⭐ | ||||||
| A | 2001:15e8:101:1::c282🇨🇿 INTERNET-CZ2001:15e8::/32 | ||||||
| PTR | ns.forpsi.net | ||||||
| A | 81.2.194.130🇨🇿 INTERNET-CZ81.2.192.0/18 INTERNET CZ, a.s. | ||||||
| PTR | ns.forpsi.net | ||||||
| NS | ns.forpsi.cz | ||||||
| A | 2001:15e8:201:1::d1b9🇨🇿 INTERNET-CZ2001:15e8::/32 | ||||||
| PTR | ns.forpsi.cz | ||||||
| A | 81.2.209.185🇨🇿 INTERNET-CZ81.2.209.0/24 | ||||||
| PTR | ns.forpsi.cz | ||||||
| NS | ns.forpsi.it | ||||||
| A | 2a00:6d41:2:1::5🇮🇹 ARUBA-ASN2a00:6d41::/32 Aruba S.p.A. IPv6 Network | ||||||
| PTR | ns.forpsi.it | ||||||
| A | 95.110.254.165🇮🇹 ARUBA-ASN95.110.192.0/18 Aruba S.p.A. Network | ||||||
| PTR | host165-254-110-95.serverdedicati.aruba.it | ||||||
| MX | mail.4ws.cz ⭐ | ||||||
| A | 77.78.106.41🇨🇿 CASABLANCA-AS77.78.96.0/20 Casablanca INT | ||||||
| PTR | mx.4ws.cz | ||||||
| TXT | v=spf1 a mx ip4:77.78.106.56 include:_spf.4ws.cz ~all | ||||||
| TXT | google-site-verification=ahlKdVcy5sEoqvlvmFcLllWv1Ke84ldcwQl6rPJ9BoQ | ||||||
| SOA | ns.forpsi.netadmin@forpsi.com 2026-07-18 #1 | ||||||
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=1785565042 | ||||||
Subdomains
openai.4wdev.cz |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSns.forpsi.net2026-03-07 → 2026-08-01 · 2 obs
● 2026-08-01 07:16:52
●A77.78.106.562026-03-07 → 2026-08-01 · 2 obs
● 2026-08-01 07:16:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | d.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz | 8 records |
| 4wdev.cz | ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net | 2 records |
✅ Authoritative Response
Server:95.110.254.165
NS records: ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1629ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 77.78.106.56 |
| NS | 3 | ns.forpsi.cz, ns.forpsi.it... |
| MX | 1 | mail.4ws.cz (pri: 10) |
| TXT | 2 | v=spf1 a mx ip4:77.78.106.56 include:_sp, google-site-verification=ahlKdVcy5sEoqvl |
| SOA | 1 | ns.forpsi.net admin.forpsi.com |
📌 Glue Records Collected
Total: 10
In-bailiwick: 8 (a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz...)
Out-of-bailiwick: 2 (ns.forpsi.cz, ns.forpsi.cz)
Analysis
Hierarchy
4wdev.cz is the parent zone for openai.4wdev.cz.
IP Addresses
4wdev.cz points to a single IP number: 77.78.106.56.
Additional host names — parking.cz, ebas.cz, chachar.cz and two others — share IP numbers with 4wdev.cz.
Name Servers
4wdev.cz carries NS records delegating to ns.forpsi.cz, ns.forpsi.it and ns.forpsi.net.
4wdev.cz partially shares its NS delegation with several other domains, including zoopla.cz, interactiveworld.eu, az-com.eu and two others.
These name servers often co-occur with the name servers ns.forpsi.us.
ns.forpsi.cz, ns.forpsi.it and ns.forpsi.net are three hostnames that each resolve to a pair of IP addresses: ns.forpsi.cz to 81.2.209.185 and 2001:15e8:201:1::d1b9, ns.forpsi.it to 95.110.254.165 and 2a00:6d41:2:1::5, and ns.forpsi.net to 81.2.194.130 and 2001:15e8:101:1::c282.
Mail Servers
4wdev.cz has one mail server: mail.4ws.cz.
4wdev.cz shares the same mail server setup as other domains, including acstrans.cz, pripojto.cz, hradynazahrady.cz and two others.
4wdev.cz shares mail servers — at least in part — with other domains, including dsk.cz, obalymancik.cz, sbdocelar.cz and two others.
mail.4ws.cz carries a single IP number, which is 77.78.106.41.