AS47949 — GSNETCZ gsnet.cz s.r.o.

AS47949 announces 1 IPv4 prefixes covering 2,048 addresses and 0 IPv6 prefixes.

About this network

GSNETCZ is operated by gsnet.cz s.r.o.

What it's used for

• The address space carries residential customer traffic, evidenced by the reverse DNS record 13.cust.spartak.gsnet.cz and the netname CZ-NET-ONLINE-20080908.
• The AS announces a single IPv4 prefix, 92.43.24.0/21, comprising 2048 addresses, while maintaining 23 observed routing neighbours.
• As a cable and DSL provider, the traffic consists of subscriber eyeballs and residential internet access for customers in the Czech Republic.

Notable

• The registrant NETONLINE Hostmasters and gsnet.cz s.r.o. align with the AS holder, confirming consistent ownership of the address space.
• The operator is also known as CoolNetwork or NetOnLine, reflecting its history as a regional internet service provider.
• The inventory consists of a single contiguous /21 block with no announced IPv6 prefixes.

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

Announced prefixes

• 92.43.24.0/21

Upstream networks

• AS174 Cogent Communications, LLC
• AS39392 SH.cz s.r.o.
• AS37721 Virtual Technologies & Solutions
• AS20562 Broadband Hosting B.V.
• AS24482 SG.GS
• AS29504 Freenet Liberec, z.s.

Downstream networks

• AS60724 Sicuro Services s. r. o.

Adjacent networks

• AS174 Cogent Communications, LLC
• AS60724 Sicuro Services s. r. o.
• AS39392 SH.cz s.r.o.
• AS29504 Freenet Liberec, z.s.
• AS20562 Broadband Hosting B.V.
• AS24482 SG.GS
• AS37721 Virtual Technologies & Solutions

Routing security

• RPKI: 1 valid, 0 invalid and 0 not-found announcements; 3 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 3 route objects.
• Listed in as-sets: AS-CDN77, AS-GBXS, AS-GBXS6, AS-GBXSCUST-FULL, AS-GBXSCUST-PARTIAL, AS-GSNET-SET-TR-OUT-ETT, AS-GSNET-SET-TR-OUT-KAORA, AS-GSNET-SET-TR-OUT-PROZETA, AS-GSNET-SET-TR-OUT-TINET, AS-PEERINGCZ-RS, AS-SET-COOLN-NIX, AS-SET-COOLN-TRA, AS-SET-GSNET-PEERINGCZ, AS-SET-GSNET-TRANSIT, AS-SET-NETONLINE, AS-SUPERNETWORK-TRANSIT, AS-TRANSCZ, AS24971:AS-MAI-PEERING-CZ-PEER.

Internet exchanges

• Peering.cz — Prague, Czech Republic
• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic