AS29321 — CENTRONETAS Czech Republic

AS29321 announces 5 IPv4 prefixes covering 15,360 addresses and 1 IPv6 prefixes.

About this network

The AS handle CENTRONETAS is held by O2 Czech Republic, a.s.

What it's used for

• The address space carries customer access traffic, evidenced by reverse DNS entries such as 254-107-243-80.cust.centrio.cz and 254-75-239-109.cust.centrio.cz.
• With 15360 IPv4 addresses announced across 5 prefixes and only 1 observed neighbour, the ratio indicates an access or eyeball network rather than a transit provider.

Notable

• All registrants for the announced prefixes are listed as 5610-Tech-and-Admin; O2 Czech Republic, a.s., which aligns with the AS holder.
• The address inventory consists of five distinct IPv4 blocks ranging from /20 to /22, along with a single /32 IPv6 prefix.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 80.243.96.0/20
• 94.143.168.0/21
• 109.239.64.0/20
• 194.59.240.0/22
• 217.195.160.0/20
• 2a02:b20::/32

Upstream networks

• AS16246 O2 Czech Republic, a.s.

Adjacent networks

• AS16246 O2 Czech Republic, a.s.