Autonomous System
AS49101 CEZNET s.r.o.
ISPActiveCzechiaRIPE
AS49101 (KTCT-ASN) is an ISP network operated by CEZNET s.r.o. in Czechia, registered with RIPE. It has 2 IPv4 prefixes with 16,384 addresses and 2 IPv6 prefixes, which makes it the 7,869th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses16,384in 2 prefixes
IPv6 prefixes2≈ 1.6 × 10²⁹ addresses
Size rank#7,869of 82,200 active ASNs
Details
OrganizationCEZNET s.r.o.
AS nameKTCT-ASN
Websitecogentco.com
Country Czechia (CZ)
Network typeISP
RegistryRIPE
Abuse contactdohled@ceznet.cz
Registered2009-04-14
Last updated2025-11-26
IPv4 prefixes
2 prefixes · 16,384 addresses| Network | Addresses | First – last address |
|---|---|---|
| 46.36.32.0/19 | 8,192 | 46.36.32.0 – 46.36.63.255 |
| 82.144.128.0/19 | 8,192 | 82.144.128.0 – 82.144.159.255 |
46.36.32.0/19 82.144.128.0/19
IPv6 prefixes
2 prefixes- 2a02:d00::/32
- 2a02:25b0::/32
2a02:d00::/32 2a02:25b0::/32
Query AS49101 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS49101&key=YOUR_API_KEY"Any address in its prefixes resolves to AS49101, with or without a key:
curl "https://api.ipapi.is/?q=46.36.32.1"Other networks of CEZNET s.r.o.
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