Autonomous System
AS44143 A1 Srbija d.o.o. Beograd
ISPActiveSerbiaRIPE
AS44143 (A1SERBIA-AS) is an ISP network operated by A1 Srbija d.o.o. Beograd in Serbia, registered with RIPE. It has 14 IPv4 prefixes with 26,624 addresses and 3 IPv6 prefixes, which makes it the 5,857th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses26,624in 14 prefixes
IPv6 prefixes3≈ 7.9 × 10²⁹ addresses
Size rank#5,857of 82,200 active ASNs
Details
OrganizationA1 Srbija d.o.o. Beograd
AS nameA1SERBIA-AS
Websitea1.rs
Country Serbia (RS)
Network typeISP
RegistryRIPE
Abuse contactzloupotreba@a1.rs
Registered2007-11-23
Last updated2026-05-14
IPv4 prefixes
14 prefixes · 26,624 addresses| Network | Addresses | First – last address |
|---|---|---|
| 77.243.16.0/20 | 4,096 | 77.243.16.0 – 77.243.31.255 |
| 188.120.96.0/20 | 4,096 | 188.120.96.0 – 188.120.111.255 |
| 37.19.104.0/21 | 2,048 | 37.19.104.0 – 37.19.111.255 |
| 95.86.48.0/21 | 2,048 | 95.86.48.0 – 95.86.55.255 |
| 188.120.96.0/21 | 2,048 | 188.120.96.0 – 188.120.103.255 |
| 188.120.104.0/21 | 2,048 | 188.120.104.0 – 188.120.111.255 |
| 188.120.112.0/21 | 2,048 | 188.120.112.0 – 188.120.119.255 |
| 198.143.176.0/21 | 2,048 | 198.143.176.0 – 198.143.183.255 |
| 95.86.4.0/22 | 1,024 | 95.86.4.0 – 95.86.7.255 |
| 95.86.8.0/22 | 1,024 | 95.86.8.0 – 95.86.11.255 |
| 95.86.60.0/22 | 1,024 | 95.86.60.0 – 95.86.63.255 |
| 185.37.24.0/22 | 1,024 | 185.37.24.0 – 185.37.27.255 |
| 188.120.112.0/22 | 1,024 | 188.120.112.0 – 188.120.115.255 |
| 188.120.116.0/22 | 1,024 | 188.120.116.0 – 188.120.119.255 |
77.243.16.0/20 188.120.96.0/20 37.19.104.0/21 95.86.48.0/21 188.120.96.0/21 188.120.104.0/21 188.120.112.0/21 198.143.176.0/21 95.86.4.0/22 95.86.8.0/22 95.86.60.0/22 185.37.24.0/22 188.120.112.0/22 188.120.116.0/22
IPv6 prefixes
3 prefixes- 2a00:61c0::/29
- 2a00:61c0::/32
- 2a00:61c1::/32
2a00:61c0::/29 2a00:61c0::/32 2a00:61c1::/32
Query AS44143 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=AS44143&key=YOUR_API_KEY"Any address in its prefixes resolves to AS44143, with or without a key:
curl "https://api.ipapi.is/?q=77.243.16.1"Largest networks in Serbia
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