linuxsystem.cz - dns.ninja
linuxsystem.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 89.235.1.53🇨🇿 QUANTCOM-AS89.235.0.0/18 Dial Telecom, a.s. | ||||||
| PTR | whitefox.hosting4u.cz | ||||||
| NS | ns1.tele3.cz ⭐ | ||||||
| A | 2001:1528:123::d01🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network | ||||||
| A | 81.0.217.111🇨🇿 CASABLANCA-AS81.0.217.0/24 Casablanca INT | ||||||
| NS | ns2.tele3.cz | ||||||
| A | 2001:4de8:fa71:7e1e::d02🇨🇿 QUANTCOM-AS2001:4de8::/32 Dial Telecom, a.s. | ||||||
| PTR | ns2.tele3.cz | ||||||
| A | 95.80.251.222🇨🇿 QUANTCOM-AS95.80.192.0/18 Dial Telecom, a.s. | ||||||
| PTR | ns2.tele3.cz | ||||||
| NS | ns3.tele3.eu | ||||||
| A | 2a01:4f8:162:24c1::d03🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | ns3.tele3.eu | ||||||
| A | 5.9.97.250🇩🇪 Hetzner5.9.0.0/16 HETZNER-RZ-FKS-BLK5 | ||||||
| PTR | ns3.tele3.eu | ||||||
| MX | mail.dc3.cz ⭐ | ||||||
| A | 81.0.217.5🇨🇿 CASABLANCA-AS81.0.217.0/24 Casablanca INT | ||||||
| SOA | ns1.tele3.czroot@tele3.cz serial=1779921152 | ||||||
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=1783453640 | ||||||
Subdomains
fiber.linuxsystem.cz |
Same first word
linuxsystem.be |
linuxsystem.cz |
linuxsystem.hu |
linuxsystem.com |
linuxsystem.org |
linuxsystem.at |
linuxsystem.ru |
Similar names
systemlinux.com |
systemlinux.eu |
sixtylumens.com |
systemlinux.altervista.org |
systemlinux.org |
systemlinux.co.uk |
DNS History
11 records (5 active, 6 former)
○NSns3.tele3.cz2015-08-03 → 2017-02-19 · 4 obs
● 2017-02-19 03:48:10
○ 2026-02-22 23:22:26
○ 2026-07-07 20:11:02
●NSns3.tele3.eu2026-02-22 → 2026-07-07 · 3 obs
● 2026-02-22 23:22:26
● 2026-07-07 20:11:02
○NSns4.tele3.eu2015-11-26 → 2017-02-19 · 5 obs
● 2015-11-26 04:20:18
● 2017-02-19 03:48:10
○ 2026-02-22 23:22:26
○ 2026-07-07 20:11:02
○NSns4.tele3.sk2015-08-03 → 2015-08-03 · 3 obs
○ 2015-11-26 04:20:18
○ 2026-07-07 20:11:02
○MXblackcat.tele3.cz2015-08-03 → 2017-02-19 · 4 obs
● 2017-02-19 03:48:10
○ 2026-02-22 23:22:26
○ 2026-07-07 20:11:02
○A2001:1528:123:123::1122015-08-03 → 2017-02-19 · 4 obs
● 2017-02-19 03:48:10
○ 2026-02-22 23:22:26
○ 2026-07-07 20:11:02
○A81.0.217.1122015-08-03 → 2017-02-19 · 4 obs
● 2017-02-19 03:48:10
○ 2026-02-22 23:22:26
○ 2026-07-07 20:11:02
●A89.235.1.532026-02-22 → 2026-07-07 · 3 obs
● 2026-02-22 23:22:26
● 2026-07-07 20:11:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | 8 records |
| linuxsystem.cz | ns1.tele3.cz, ns3.tele3.eu, ns2.tele3.cz | 4 records |
✅ Authoritative Response
Server:5.9.97.250
NS records: ns1.tele3.cz, ns3.tele3.eu, ns2.tele3.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1973ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 89.235.1.53 |
| NS | 3 | ns2.tele3.cz, ns1.tele3.cz... |
| MX | 1 | mail.dc3.cz (pri: 10) |
| SOA | 1 | ns1.tele3.cz root.tele3.cz |
📌 Glue Records Collected
Total: 12
In-bailiwick: 8 (d.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz...)
Out-of-bailiwick: 4 (ns2.tele3.cz, ns1.tele3.cz, ns2.tele3.cz...)
Analysis
Hierarchy
linuxsystem.cz is the parent zone for fiber.linuxsystem.cz.
IP Addresses
linuxsystem.cz resolves to just one IP address, 89.235.1.53.
Two other host names, along with webus.cz, czis.cz and trhpujcek.eu, also share IP numbers with linuxsystem.cz.
Name Servers
linuxsystem.cz is delegated to three name servers: ns1.tele3.cz, ns2.tele3.cz and ns3.tele3.eu.
linuxsystem.cz partially shares its NS delegation with several other domains, including dompo.cz, unreel.cz, 3579.cz and two others.
These name servers often co-occur with the name servers ns4.tele3.us.
ns1.tele3.cz, ns2.tele3.cz and ns3.tele3.eu each resolve to two IP addresses: ns1.tele3.cz resolves to 81.0.217.111 and 2001:1528:123::d01; ns2.tele3.cz resolves to 95.80.251.222 and 2001:4de8:fa71:7e1e::d02; ns3.tele3.eu resolves to 5.9.97.250 and 2a01:4f8:162:24c1::d03.
Mail Servers
The sole mail server for linuxsystem.cz is mail.dc3.cz.
Among the domains sharing a mail server setup with linuxsystem.cz are 1blog.cz, komfortne.cz, zuhk.cz and two others.
There is at least a partial MX overlap between linuxsystem.cz and other domains, including strojimport.eu, spedex.cz, gbob.cz and two others.
mail.dc3.cz resolves to a single IP number: 81.0.217.5.