cpc.cz - robtex.com
cpc.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 81.91.86.11🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | php5.web4u.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 | mx.web4u.cz ⭐ | ||||||
| A | 2001:1568::7012🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | mx.web4u.cz | ||||||
| A | 81.91.87.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.web4u.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2009-05-22 #1 | ||||||
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=1775962034 | ||||||
Subdomains
mail.cpc.cz |
Same first word
Similar names
DNS History
5 records (4 active, 1 former)
○MXmail.cpc.cz2015-08-14 → 2017-01-25 · 4 obs
● 2017-01-25 11:07:12
○ 2026-04-07 14:21:46
○ 2026-04-12 03:28:20
●MXmx.web4u.cz2026-04-07 → 2026-04-12 · 3 obs
● 2026-04-07 14:21:46
● 2026-04-12 03:28:20
●A81.91.86.112015-08-14 → 2026-04-12 · 2 obs
● 2026-04-12 03:28:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| cpc.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1042ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.11 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (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
Hierarchy
cpc.cz is the parent of mail.cpc.cz.
IP Addresses
cpc.cz resolves to one IP number: 81.91.86.11.
other host names including unassigned-81-91-81-45.web4u.cz, unassigned-81-91-84-74.web4u.cz, webmusic.cz, unassigned-81-91-85-172.web4u.cz and unassigned-81-91-87-239.web4u.cz share IP numbers with cpc.cz.
Name Servers
cpc.cz is delegated to two name servers ns2.web4u.cz and ns.web4u.cz.
cpc.cz shares the same name server setup as other domains, for instance livecams19.com, adamecmiroslav.cz, bkjh.cz, krajta.cz and (0x736578)-drive.cz.
cpc.cz shares at least some name servers with other domains, for example gasstorage.cz, voss-ova.cz and varicad.at.
Host names with two IP numbers:
The host name ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12; the host name ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
cpc.cz is handled by a single mail server, mx.web4u.cz.
cpc.cz shares the same mail server setup as other domains, for instance air-charter.cz, fireworker.cz, moveti.com, jura-shop.eu and supertip.cz.
cpc.cz shares mail servers with other domains to some extent, for instance pujcovna-lodi.cz.
mx.web4u.cz resolves to two IP numbers: 2001:1568::7012 and 81.91.87.12.