bystrc.cz - robtex.com
bystrc.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=1778573834 | ||||||
Subdomains
mail.bystrc.cz |
Same first word
Similar names
DNS History
11 records (5 active, 6 former)
○NSalfa.ns.active24.cz2015-07-11 → 2016-12-25 · 4 obs
● 2016-12-25 12:49:18
○ 2026-02-18 00:49:04
○ 2026-05-12 08:39:38
○NSbeta.ns.active24.cz2015-07-11 → 2016-12-25 · 4 obs
● 2016-12-25 12:49:18
○ 2026-02-18 00:49:04
○ 2026-05-12 08:39:38
○NSgama.ns.active24.sk2015-07-11 → 2016-12-25 · 4 obs
● 2016-12-25 12:49:18
○ 2026-02-18 00:49:04
○ 2026-05-12 08:39:38
●NSns1.websupport.cz2026-02-18 → 2026-05-12 · 3 obs
● 2026-02-18 00:49:04
● 2026-05-12 08:39:38
●NSns2.websupport.cz2026-02-18 → 2026-05-12 · 3 obs
● 2026-02-18 00:49:04
● 2026-05-12 08:39:38
●NSns3.websupport.eu2026-02-18 → 2026-05-12 · 3 obs
● 2026-02-18 00:49:04
● 2026-05-12 08:39:38
●MXbystrc-cz.mail.protection.outlook.com2026-02-18 → 2026-05-12 · 3 obs
● 2026-02-18 00:49:04
● 2026-05-12 08:39:38
○MXmail.bystrc.cz2015-07-11 → 2016-12-25 · 4 obs
● 2016-12-25 12:49:18
○ 2026-02-18 00:49:04
○ 2026-05-12 08:39:38
○A46.36.35.1412015-07-11 → 2016-03-28 · 4 obs
● 2016-03-28 01:46:46
○ 2016-07-29 09:16:28
○ 2026-05-12 08:39:38
●A46.36.36.1532026-02-18 → 2026-05-12 · 3 obs
● 2026-02-18 00:49:04
● 2026-05-12 08:39:38
○A51.254.238.682016-07-29 → 2016-12-25 · 5 obs
● 2016-07-29 09:16:28
● 2016-12-25 12:49:18
○ 2026-02-18 00:49:04
○ 2026-05-12 08:39:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| bystrc.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.13
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: 1971ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 46.36.36.153 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 1 | bystrc-cz.mail.protection.outlook.com (p |
| TXT | 2 | MS=ms62832790, v=spf1 include:spf.protection.outlook.co |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
Hierarchy
bystrc.cz is the parent of mail.bystrc.cz.
IP Addresses
bystrc.cz points to IP number 46.36.36.153.
For instance, other host names user253.ktuo.cz, kranich.cz, kada.cz, 86-143.ktuo.cz and 27-98-user.ktuo.cz share IP numbers with bystrc.cz.
Name Servers
The delegation for bystrc.cz is handled by three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
bystrc.cz shares name servers with other domains at least partially, for example polgarmester.sk, genchem.cz, ateliermirka.cz, gentlewomen.cz and viethouse.cz.
Host names with two IPs:
ns1.websupport.cz points to 2a10:bbc0::11 and 45.10.97.11
ns2.websupport.cz points to 2a02:250:3::12 and 185.71.159.12
ns3.websupport.eu points to 2a10:bbc0::13 and 45.10.97.13
Mail Servers
bystrc.cz is handled by a single mail server, bystrc-cz.mail.protection.outlook.com.
Host name bystrc-cz.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:ca04::1, 2a01:111:f403:ca04::2, 2a01:111:f403:ca04::10, 2a01:111:f403:ca09::f, 52.101.68.3, 52.101.68.5, 52.101.68.21 and 52.101.73.153.