List of the top 20 organizations with the largest IP allocations in Bulgaria
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| A1 Bulgaria EAD | 1,769,729 | 1.13 x 235 | 7 | 1,638 | |
| Vivacom Bulgaria EAD | 1,551,366 | 1.51 x 233 | 10 | 1,050 | |
| "Cooolbox" AD | 187,904 | 0 | 1 | 128 | |
| 4 | Geodim Ltd. | 108,288 | 0 | 1 | 190 |
| 5 | Bulgarian Research and Education Network Association (BREN) | 89,344 | 232 | 1 | 54 |
| 6 | Comnet Bulgaria Holding Ltd. | 75,008 | 1.13 x 235 | 2 | 162 |
| 7 | Optisprint OOD | 68,608 | 232 | 1 | 141 |
| 8 | Net-Surf.net Ltd. | 67,591 | 0 | 1 | 172 |
| 9 | UltraNET Ltd | 66,304 | 0 | 1 | 189 |
| 10 | Angel Soft OOD | 59,648 | 0 | 1 | 110 |
| 11 | Evolink AD | 56,576 | 233 | 1 | 31 |
| 12 | HZ Hosting Ltd | 51,200 | 233 | 4 | 210 |
| 13 | Digital Systems Ltd | 50,432 | 232 | 1 | 6 |
| 14 | Neterra Ltd. | 45,058 | 232 | 2 | 166 |
| 15 | Geo BG Net SPLtd. | 43,264 | 0 | 1 | 138 |
| 16 | "NOVATEL" EOOD | 41,984 | 1.13 x 235 | 1 | 30 |
| 17 | M SAT Cable SA | 39,424 | 232 | 1 | 23 |
| 18 | ESCOM Ltd. - Haskovo | 37,889 | 232 | 1 | 150 |
| 19 | Rimex Ltd. | 32,768 | 0 | 1 | 18 |
| 20 | NETGUARD LLC | 32,514 | 232 | 3 | 85 |