AS20701 — CZNIC-AS3

AS20701 announces 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefixes.

About this network

The AS handle CZNIC-AS3 is operated by CZ.NIC, z.s.p.o.

What it's used for

• The address space carries infrastructure for the .CZ top-level domain registry, evidenced by netnames CZ-NIC-ODVR and CZ-NIC and registrants "Top level domain .CZ Operations" and "CZ.NIC, z.s.p.o."
• The inventory consists of 512 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

• Registrants align with the announcer, listing "Top level domain .CZ Operations" and "CZ.NIC, z.s.p.o." for the announced blocks.
• The address inventory is minimal, comprising two /24 IPv4 blocks and a single /47 IPv6 prefix, consistent with a dedicated operational estate for registry services.

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

Announced prefixes

• 185.43.135.0/24
• 193.17.47.0/24
• 2001:148f:fffe::/47

Upstream networks

• AS25192 CZ.NIC, z.s.p.o.

Adjacent networks

• AS25192 CZ.NIC, z.s.p.o.