bluerocket.cz - robtex.com
bluerocket.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1568::14🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php7.web4u.cz | ||||||
| A | 81.91.86.14🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mx1.mailchannels.net ⭐ | ||||||
| A | 54.69.1.140🇺🇸 Amazon54.68.0.0/15 EC2 PDX Prefix | ||||||
| PTR | ec2-54-69-1-140.us-west-2.compute.amazonaws.com | ||||||
| MX | mx2.mailchannels.net ⭐ | ||||||
| A | 18.236.29.166🇺🇸 Amazon18.236.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-18-236-29-166.us-west-2.compute.amazonaws.com | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-05-06 #0 | ||||||
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=1774655258 | ||||||
Same first word
bluerocket.cz |
bluerocket.io |
bluerocket.org |
bluerocket.it |
bluerocket.co.za |
bluerocket.pt |
bluerocket.co.nz |
bluerocket.us |
bluerocket.net |
Similar names
DNS History
21 records (6 active, 15 former)
●NSns.web4u.cz2026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 20:26:08
● 2026-03-28 00:37:12
○NSns1.thinline.cz2015-04-26 → 2017-06-03 · 4 obs
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
○NSns2.thinline.cz2015-04-26 → 2017-06-03 · 4 obs
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
●NSns2.web4u.cz2026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 20:26:08
● 2026-03-28 00:37:12
○NSns3.cesky-hosting.eu2015-04-26 → 2017-06-03 · 4 obs
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
○MXin1-smtp.messagingengine.com2016-11-23 → 2017-06-03 · 5 obs
● 2016-11-23 13:31:12
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
○MXin2-smtp.messagingengine.com2016-11-23 → 2017-06-03 · 5 obs
● 2016-11-23 13:31:12
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
●MXmx1.mailchannels.net2026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 20:26:08
● 2026-03-28 00:37:12
○MXmx1b20.thinline.cz2015-04-26 → 2016-03-17 · 4 obs
● 2016-03-17 13:37:56
○ 2016-07-09 21:52:56
○ 2026-03-28 00:37:12
○MXmx1d10.thinline.cz2015-04-26 → 2016-03-17 · 4 obs
● 2016-03-17 13:37:56
○ 2016-07-09 21:52:56
○ 2026-03-28 00:37:12
●MXmx2.mailchannels.net2026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 20:26:08
● 2026-03-28 00:37:12
●A2001:1568::142026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 20:26:08
● 2026-03-28 00:37:12
○A216.239.32.212015-10-15 → 2016-03-17 · 5 obs
● 2015-10-15 20:46:14
● 2016-03-17 13:37:56
○ 2016-07-09 21:52:56
○ 2026-03-28 00:37:12
○A216.239.34.212015-10-15 → 2016-03-17 · 5 obs
● 2015-10-15 20:46:14
● 2016-03-17 13:37:56
○ 2016-07-09 21:52:56
○ 2026-03-28 00:37:12
○A216.239.36.212015-10-15 → 2016-03-17 · 5 obs
● 2015-10-15 20:46:14
● 2016-03-17 13:37:56
○ 2016-07-09 21:52:56
○ 2026-03-28 00:37:12
○A216.239.38.212015-10-15 → 2016-03-17 · 5 obs
● 2015-10-15 20:46:14
● 2016-03-17 13:37:56
○ 2016-07-09 21:52:56
○ 2026-03-28 00:37:12
○A2a00:1ed0:2:0:1:5bef:c8a0:12015-04-26 → 2015-04-26 · 3 obs
○ 2015-10-15 20:46:14
○ 2026-03-28 00:37:12
○A2a02:4a8:ac24:102::96:902016-07-09 → 2017-06-03 · 5 obs
● 2016-07-09 21:52:56
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
●A81.91.86.142026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 20:26:08
● 2026-03-28 00:37:12
○A81.95.96.902016-07-09 → 2017-06-03 · 5 obs
● 2016-07-09 21:52:56
● 2017-06-03 14:56:08
○ 2026-03-25 20:26:08
○ 2026-03-28 00:37:12
○A91.239.200.1602015-04-26 → 2015-04-26 · 3 obs
○ 2015-10-15 20:46:14
○ 2026-03-28 00:37:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| bluerocket.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 2245ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.14 |
| AAAA | 1 | 2001:1568::14 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 2 | mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
bluerocket.cz points to two IP numbers: 2001:1568::14 and 81.91.86.14.
Other host names such as golsport.cz, hemapuls.cz, x199.server4u.cz, www.vanci.cz and videomapping.ch share IPs with bluerocket.cz.
Name Servers
Two name servers ns2.web4u.cz and ns.web4u.cz handle the delegation for bluerocket.cz.
bluerocket.cz shares the same name server setup as other domains, for example penzion-u-pelejovych.cz, aquacup.cz, thebeatlesrevival.cz, velkykosik.cz and vdck.cz.
Host names with two IP numbers:
ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12.
ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
Two mail servers handle bluerocket.cz: mx1.mailchannels.net and mx2.mailchannels.net.
bluerocket.cz shares the same mail server setup as other domains, including teresi.us, quartermoon.com, ecfos.com, neptunemachinery.com and mail.neneee.com.
Host names with one IP number:
mx1.mailchannels.net points to 54.69.1.140; mx2.mailchannels.net points to 18.236.29.166.