byst.cz - robtex.com
byst.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=1783770441 | ||||||
Subdomains
Same first word
byst.de |
byst.ru |
byst.com |
byst.com.cn |
byst.biz |
byst.org |
byst.cz |
byst.ro |
byst.dk |
byst.it |
byst.cn |
byst.org.in |
byst.by |
Similar names
DNS History
10 records (8 active, 2 former)
●NSns.forpsi.net2015-08-26 → 2026-07-11 · 2 obs
● 2026-07-11 12:24:06
●MXbyst-cz.mail.protection.outlook.com2026-06-13 → 2026-07-11 · 3 obs
● 2026-06-13 08:27:36
● 2026-07-11 12:24:06
●MXmail.byst.cz2017-01-23 → 2026-07-11 · 3 obs
● 2017-01-23 18:38:14
● 2026-07-11 12:24:06
●MXremote.byst.cz2015-08-26 → 2026-07-11 · 2 obs
● 2026-07-11 12:24:06
○A2a01:28:ca:110:10:3:0:122015-08-26 → 2017-01-23 · 4 obs
● 2017-01-23 18:38:14
○ 2026-06-13 08:27:36
○ 2026-07-11 12:24:06
●A2a01:28:ca:110:88:86:102:62026-06-13 → 2026-07-11 · 3 obs
● 2026-06-13 08:27:36
● 2026-07-11 12:24:06
●A88.86.102.62026-06-13 → 2026-07-11 · 3 obs
● 2026-06-13 08:27:36
● 2026-07-11 12:24:06
○A88.86.102.92015-08-26 → 2017-01-23 · 4 obs
● 2017-01-23 18:38:14
○ 2026-06-13 08:27:36
○ 2026-07-11 12:24:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | c.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| byst.cz | ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net | 2 records |
✅ Authoritative Response
Server:81.2.209.185
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: 1598ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 88.86.102.6 |
| AAAA | 1 | 2a01:28:ca:110:88:86:102:6 |
| NS | 3 | ns.forpsi.cz, ns.forpsi.it... |
| MX | 3 | byst-cz.mail.protection.outlook.com (pri, remote.byst.cz (pri: 10)... |
| TXT | 3 | MS=ms78760910, AwZdrOMmMDyxxaJUSrF5RGc1Ts6wDJUyJZWEmJ41... |
| SOA | 1 | ns.forpsi.net admin.forpsi.net |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns.forpsi.cz, ns.forpsi.cz)
Analysis
Hierarchy
byst.cz is the parent domain of mail.byst.cz and remote.byst.cz.
IP Addresses
byst.cz has two IP addresses: 88.86.102.6 and 2a01:28:ca:110:88:86:102:6
Additional host names — sarisskemichalany.sk, partizanskalupca.com, okoc.sk and two others — share IP numbers with byst.cz.
Name Servers
byst.cz carries NS records delegating to ns.forpsi.cz, ns.forpsi.it and ns.forpsi.net.
At least some of byst.cz's name servers are shared with other domains, for example balcom.cz, corex.cz, volesak.cz and two more.
These name servers tend to be used in conjunction 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
The MX records for byst.cz list three mail servers: mail.byst.cz, remote.byst.cz and byst-cz.mail.protection.outlook.com.
Host names with 8 IP numbers:
byst-cz.mail.protection.outlook.com resolves to 52.101.68.0, 52.101.68.10 and 52.101.68.15 among others, with 5 other IP addresses in total.
Host names pointing to a single IP address:
The hostname remote.byst.cz resolves to 93.157.128.154.