Autonomous System
AS5538 Institute of Mathematics and Computer Science of University of Latvia
EducationActiveLatviaRIPE
AS5538 (SigmaNet-NIC) is an education network operated by Institute of Mathematics and Computer Science of University of Latvia in Latvia, registered with RIPE. It has 5 IPv4 prefixes with 27,904 addresses and 2 IPv6 prefixes, which makes it the 5,720th largest of 82,141 active autonomous systems by IPv4 space.
IPv4 addresses27,904in 5 prefixes
IPv6 prefixes2≈ 6.4 × 10²⁹ addresses
Size rank#5,720of 82,141 active ASNs
Details
OrganizationInstitute of Mathematics and Computer Science of University of Latvia
AS nameSigmaNet-NIC
Websitelumii.lv
Country Latvia (LV)
Network typeEducation
RegistryRIPE
Abuse contactabuse@sigmanet.lv
Registered2002-08-22
Last updated2026-07-29
IPv4 prefixes
5 prefixes · 27,904 addresses| Network | Addresses | First – last address |
|---|---|---|
| 85.254.192.0/18 | 16,384 | 85.254.192.0 – 85.254.255.255 |
| 92.240.64.0/19 | 8,192 | 92.240.64.0 – 92.240.95.255 |
| 5.152.224.0/21 | 2,048 | 5.152.224.0 – 5.152.231.255 |
| 185.23.160.0/22 | 1,024 | 185.23.160.0 – 185.23.163.255 |
| 194.8.1.0/24 | 256 | 194.8.1.0 – 194.8.1.255 |
85.254.192.0/18 92.240.64.0/19 5.152.224.0/21 185.23.160.0/22 194.8.1.0/24
IPv6 prefixes
2 prefixes- 2a02:500::/29
- 2a02:500:4000::/35
2a02:500::/29 2a02:500:4000::/35
Query AS5538 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=AS5538&key=YOUR_API_KEY"Any address in its prefixes resolves to AS5538, with or without a key:
curl "https://api.ipapi.is/?q=85.254.192.1"