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 | 1,769,473 | 1.13 x 235 | 7 | 1,637 | |
| Vivacom Bulgaria EAD | 1,555,462 | 1.51 x 233 | 10 | 1,029 | |
| "Cooolbox" AD | 188,160 | 0 | 1 | 129 | |
| 4 | Geodim Ltd. | 106,240 | 0 | 1 | 182 |
| 5 | Bulgarian Research and Education Network Association (BREN) | 89,344 | 232 | 1 | 54 |
| 6 | Comnet Bulgaria Holding Ltd. | 74,496 | 1.13 x 235 | 2 | 160 |
| 7 | Optisprint OOD | 68,608 | 232 | 1 | 141 |
| 8 | Net-Surf.net Ltd. | 67,335 | 0 | 1 | 171 |
| 9 | UltraNET Ltd | 66,304 | 0 | 1 | 189 |
| 10 | Angel Soft OOD | 59,648 | 0 | 1 | 110 |
| 11 | Evolink AD | 56,832 | 233 | 1 | 32 |
| 12 | HZ Hosting Ltd | 50,944 | 233 | 4 | 209 |
| 13 | Digital Systems Ltd | 50,432 | 232 | 1 | 6 |
| 14 | Neterra Ltd. | 45,058 | 232 | 2 | 166 |
| 15 | Geo BG Net SPLtd. | 43,008 | 0 | 1 | 137 |
| 16 | "NOVATEL" EOOD | 41,728 | 1.13 x 235 | 1 | 28 |
| 17 | M SAT Cable SA | 39,424 | 232 | 1 | 23 |
| 18 | ESCOM Ltd. - Haskovo | 37,890 | 232 | 1 | 151 |
| 19 | Rimex Ltd. | 32,770 | 0 | 1 | 20 |
| 20 | NETGUARD LLC | 32,514 | 232 | 3 | 85 |