linuxhelp.cz - dns.ninja
linuxhelp.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=1784171838 | ||||||
Subdomains
mail.linuxhelp.cz |
Same first word
Similar names
DNS History
8 records (6 active, 2 former)
●NSns.forpsi.net2015-07-06 → 2026-07-16 · 2 obs
● 2026-07-16 04:25:36
●MXa9e53760e7a54cf7.mx1.emailprofi.seznam.cz2026-03-31 → 2026-07-16 · 3 obs
● 2026-03-31 17:11:28
● 2026-07-16 04:25:36
●MXa9e53760e7a54cf7.mx2.emailprofi.seznam.cz2026-03-31 → 2026-07-16 · 3 obs
● 2026-03-31 17:11:28
● 2026-07-16 04:25:36
○MXmail.linuxhelp.cz2015-07-06 → 2017-11-10 · 4 obs
● 2017-11-10 00:12:38
○ 2026-03-31 17:11:28
○ 2026-07-16 04:25:36
●A109.248.251.1352026-03-31 → 2026-07-16 · 3 obs
● 2026-03-31 17:11:28
● 2026-07-16 04:25:36
○A85.118.134.1742015-07-06 → 2017-11-10 · 4 obs
● 2017-11-10 00:12:38
○ 2026-03-31 17:11:28
○ 2026-07-16 04:25:36
🔍 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 |
| linuxhelp.cz | ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net | 2 records |
✅ Authoritative Response
Server:81.2.194.130
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: 1906ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 109.248.251.135 |
| NS | 3 | ns.forpsi.cz, ns.forpsi.it... |
| MX | 2 | a9e53760e7a54cf7.mx1.emailprofi.seznam.c, a9e53760e7a54cf7.mx2.emailprofi.seznam.c |
| 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
linuxhelp.cz is the parent zone for mail.linuxhelp.cz.
IP Addresses
linuxhelp.cz has exactly one IP address — 109.248.251.135.
hic.cz and mail.linuxhelp.cz, along with other host names, share IP addresses with linuxhelp.cz.
Name Servers
The authoritative name servers for linuxhelp.cz are ns.forpsi.cz, ns.forpsi.it and ns.forpsi.net — three in total.
linuxhelp.cz partially shares its NS delegation with several other domains, including milanovi.cz, iqfactory.net, msak.cz and two others.
These name servers are regularly seen alongside ns.forpsi.us and ns.forpsi.cn as name servers.
ns.forpsi.cz, ns.forpsi.it and ns.forpsi.net all resolve to exactly two IP numbers apiece: ns.forpsi.cz → 81.2.209.185 and 2001:15e8:201:1::d1b9; ns.forpsi.it → 95.110.254.165 and 2a00:6d41:2:1::5; ns.forpsi.net → 81.2.194.130 and 2001:15e8:101:1::c282.
Mail Servers
linuxhelp.cz uses two mail servers, a9e53760e7a54cf7.mx1.emailprofi.seznam.cz and a9e53760e7a54cf7.mx2.emailprofi.seznam.cz.
The two host names a9e53760e7a54cf7.mx1.emailprofi.seznam.cz and a9e53760e7a54cf7.mx2.emailprofi.seznam.cz each have a pair of IP addresses: a9e53760e7a54cf7.mx1.emailprofi.seznam.cz has 77.75.77.56 and 2a02:598:2::1056, and a9e53760e7a54cf7.mx2.emailprofi.seznam.cz has 77.75.77.146 and 2a02:598:2::1146.