b2comp.cz - robtex.com
b2comp.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 85.160.64.77🇨🇿 O2-CZECH-REPUBLIC85.160.0.0/15 CZ.CZNET | ||||||
| PTR | 85-160-64-77.reb.o2.cz | ||||||
| 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 | mail.b2comp.cz ⭐ | ||||||
| A | 2001:1568:f::1154🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | vs1154.server4u.cz | ||||||
| A | 81.91.92.182🇨🇿 WEB4U81.91.88.0/21 | ||||||
| PTR | vs1154.server4u.cz | ||||||
| TXT | v=spf1 mx -all | ||||||
| TXT | MS=310AD85E504A2E95D2E2EFDCF692FF92DC4B9F64 | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-06-11 #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=1774563457 | ||||||
Subdomains
mail.b2comp.cz |
Same first word
DNS History
5 records (4 active, 1 former)
●MXmail.b2comp.cz2015-08-31 → 2026-03-26 · 2 obs
● 2026-03-26 22:37:12
●A85.160.64.772026-03-10 → 2026-03-26 · 3 obs
● 2026-03-10 19:20:16
● 2026-03-26 22:37:12
○A90.181.224.1512015-08-31 → 2017-02-14 · 4 obs
● 2017-02-14 07:21:10
○ 2026-03-10 19:20:16
○ 2026-03-26 22:37:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| b2comp.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: 1070ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 85.160.64.77 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mail.b2comp.cz (pri: 10) |
| TXT | 2 | v=spf1 mx -all, MS=310AD85E504A2E95D2E2EFDCF692FF92DC4B9 |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns2.web4u.cz, ns.web4u.cz...)
Analysis
Hierarchy
mail.b2comp.cz has b2comp.cz as its parent.
IP Addresses
b2comp.cz maps to IP address 85.160.64.77.
Other host names, for instance kalkulacky.cz, b2c.cz, 85-160-64-77.reb.o2.cz, b2com.cz and www.b2c.cz share IP numbers with b2comp.cz.
Name Servers
Two name servers ns2.web4u.cz and ns.web4u.cz are delegated to b2comp.cz.
b2comp.cz uses the same name server configuration as other domains, such as cikanek.net, chata-ztracenka.cz, snb.cz, ortgroup.cz and total-broker.cz.
Host names with two IPs:
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
b2comp.cz is handled by a single mail server, mail.b2comp.cz.
Host name mail.b2comp.cz points to IPs 2001:1568:f::1154 and 81.91.92.182.