AS200070 — CZNIC-AS2 CZ.NIC, z.s.p.o.

AS200070 announces 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefixes.

About this network

The AS handle CZNIC-AS2 is held by CZ.NIC, z.s.p.o.

What it's used for

• The address space carries the operational infrastructure for the .cz national top-level domain, with netnames C-NS-NIC-CZ and CZ-NIC-19980925 explicitly identifying "Top level domain .CZ Operations".
• The inventory consists of 512 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, observed against 84 neighbours, indicating a transit-heavy role for a small, specialized network.
• Traffic from this AS consists of DNS resolution services, registry management systems, and web endpoints supporting the .cz domain.

Notable

• Registrants for both announced prefixes are listed as "Top level domain .CZ Operations; CZ.NIC, z.s.p.o.", fully aligning with the AS holder.
• CZ.NIC is a non-profit organization responsible for operating the .cz national top-level domain.
• The address inventory is minimal and finely subdivided, consistent with an internal corporate estate for a registry operator rather than a broad access network.

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

Announced prefixes

• 194.0.14.0/24
• 212.237.229.0/24
• 2001:678:11::/48

Upstream networks

• AS1299 Arelion Sweden AB
• AS7521 INTERNET MULTIFEED CO.
• AS6939 Hurricane Electric LLC
• AS1853 ACONET
• AS5459 London Internet Exchange Ltd.
• AS24482 SG.GS
• AS50304 Blix Solutions AS
• AS48185 team.blue NV
• AS50300 CustodianDC Limited
• AS34549 meerfarbig GmbH & Co. KG
• AS37100 SEACOM Limited
• AS12552 GlobalConnect AB
• AS37721 Virtual Technologies & Solutions
• AS17639 Converge ICT Solutions Inc.
• AS3303 Swisscom (Schweiz) AG
• AS29504 Freenet Liberec, z.s.
• AS48362 Stadtwerke Feldkirch
• AS12779 IT.Gate S.p.A.
• AS29075 IELO-LIAZO SERVICES SAS
• AS3214 xTom GmbH
• AS9002 RETN Limited
• AS20485 Joint Stock Company TransTeleCom

Adjacent networks

• AS1299 Arelion Sweden AB
• AS7521 INTERNET MULTIFEED CO.
• AS6939 Hurricane Electric LLC
• AS1853 ACONET
• AS5459 London Internet Exchange Ltd.
• AS24482 SG.GS
• AS50304 Blix Solutions AS
• AS48185 team.blue NV
• AS50300 CustodianDC Limited
• AS34549 meerfarbig GmbH & Co. KG
• AS12552 GlobalConnect AB
• AS37100 SEACOM Limited
• AS37721 Virtual Technologies & Solutions
• AS17639 Converge ICT Solutions Inc.
• AS3303 Swisscom (Schweiz) AG
• AS29504 Freenet Liberec, z.s.
• AS48362 Stadtwerke Feldkirch
• AS29075 IELO-LIAZO SERVICES SAS
• AS12779 IT.Gate S.p.A.
• AS20485 Joint Stock Company TransTeleCom
• AS9002 RETN Limited
• AS3214 xTom GmbH

Routing security

• RPKI: 10 valid, 0 invalid and 0 not-found announcements; 10 ROAs.
• ASPA: 18 authorised providers.
• IRR: 80% of announcements registered; 9 route objects.
• Listed in as-sets: AS-ACOSERV, AS-CTBC-CUSTOMERS117, AS-CZNIC, AS-CZNIC-TRANSIT, AS-HURRICANEV6, AS-IIJ, AS-IIJ6, AS-LINX, AS-MANDA-LINX-PEERS-V4, AS-MANDA-LINX-PEERS-V6, AS-MFEED, AS-VIX-MEMBERS, AS2497:AS-IIJ, AS2497:AS-IIJ6.

Internet exchanges

• LINX LON1 — London, United Kingdom
• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic
• Vienna Internet Exchange — Vienna, Austria
• LINX NoVa — Reston, United States