Autonomous System

AS15958 CETIN Ltd. Belgrade

ISPActiveSerbiaRIPE

AS15958 (CETIN_doo_AS) is an ISP network operated by CETIN Ltd. Belgrade in Serbia, registered with RIPE. It has 5 IPv4 prefixes with 76,800 addresses and 1 IPv6 prefix, which makes it the 2,773rd largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses76,800in 5 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#2,773of 82,200 active ASNs
Abuser scoreLow0.7% of its addresses flagged · method

Details

OrganizationCETIN Ltd. Belgrade
AS nameCETIN_doo_AS
Websitecetin.rs
Country Serbia (RS)
Network typeISP
RegistryRIPE
Abuse contactnet-reg@cetin.rs
Registered1970-01-01
Last updated2026-09-18

IPv4 prefixes

5 prefixes · 76,800 addresses
NetworkAddressesFirst – last address
109.245.0.0/1665,536109.245.0.0 – 109.245.255.255
109.106.224.0/204,096109.106.224.0 – 109.106.239.255
217.65.192.0/204,096217.65.192.0 – 217.65.207.255
217.65.200.0/212,048217.65.200.0 – 217.65.207.255
217.65.196.0/221,024217.65.196.0 – 217.65.199.255

IPv6 prefixes

1 prefix
  • 2a01:ac80::/32

Query AS15958 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=AS15958&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS15958, with or without a key:

curl "https://api.ipapi.is/?q=109.245.0.1"

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