bluebit.cz - robtex.com
bluebit.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=1781471836 | ||||||
Same first word
Similar names
DNS History
10 records (7 active, 3 former)
○NSns1.dotnethosting.cz2015-08-21 → 2017-03-25 · 4 obs
● 2017-03-25 15:47:30
○ 2026-06-13 07:47:30
○ 2026-06-14 21:38:32
●NSns1.websupport.cz2026-06-13 → 2026-06-14 · 3 obs
● 2026-06-13 07:47:30
● 2026-06-14 21:38:32
●NSns2.websupport.cz2026-06-13 → 2026-06-14 · 3 obs
● 2026-06-13 07:47:30
● 2026-06-14 21:38:32
●NSns3.websupport.eu2026-06-13 → 2026-06-14 · 3 obs
● 2026-06-13 07:47:30
● 2026-06-14 21:38:32
○MXin.smtp.cz2015-08-21 → 2017-03-25 · 4 obs
● 2017-03-25 15:47:30
○ 2026-06-13 07:47:30
○ 2026-06-14 21:38:32
○MXmx.smtp.cz2015-08-21 → 2017-03-25 · 4 obs
● 2017-03-25 15:47:30
○ 2026-06-13 07:47:30
○ 2026-06-14 21:38:32
●MXmx10.active24.cz2026-06-13 → 2026-06-14 · 3 obs
● 2026-06-13 07:47:30
● 2026-06-14 21:38:32
●MXmx20.active24.cz2026-06-13 → 2026-06-14 · 3 obs
● 2026-06-13 07:47:30
● 2026-06-14 21:38:32
●A2a02:4a8:ac24:104::98:1352026-06-13 → 2026-06-14 · 3 obs
● 2026-06-13 07:47:30
● 2026-06-14 21:38:32
●A81.95.98.1352015-08-21 → 2026-06-14 · 2 obs
● 2026-06-14 21:38:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| bluebit.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.11
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: 1651ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.95.98.135 |
| AAAA | 1 | 2a02:4a8:ac24:104::98:135 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 2 | mx10.active24.cz (pri: 10), mx20.active24.cz (pri: 100) |
| TXT | 1 | v=spf1 a mx include:_spf.websupport.cz - |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
IP Addresses
bluebit.cz directs to two IP numbers, 81.95.98.135 and 2a02:4a8:ac24:104::98:135
Two other host names, along with svub.cz, struhar.sk and www.globenet.cz, also share IP numbers with bluebit.cz.
Name Servers
bluebit.cz is delegated to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
bluebit.cz partially shares its NS delegation with several other domains, including pernet.cz, netcon.cz, nup.cz and two others.
These name servers regularly co-occur with the name servers ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.
ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu each resolve to two IP addresses: ns1.websupport.cz resolves to 45.10.97.11 and 2a10:bbc0::11; ns2.websupport.cz resolves to 185.71.159.12 and 2a02:250:3::12; ns3.websupport.eu resolves to 45.10.97.13 and 2a10:bbc0::13.
Mail Servers
bluebit.cz is served by two mail servers, mx10.active24.cz and mx20.active24.cz.
Among the domains sharing a mail server setup with bluebit.cz are bio-krby-kamna.cz, maxmax.sk, sauna365.cz and two others.
At least a portion of bluebit.cz's mail servers are also used by other domains, for example luciworks.com.
mx10.active24.cz and mx20.active24.cz each resolve to two IP addresses: mx10.active24.cz points to 45.13.137.85 and 2a00:4b40:aaaa:2101:45:13:137:85, while mx20.active24.cz points to 45.13.137.86 and 2a00:4b40:aaaa:2101:45:13:137:86.