| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| A1 Bulgaria EAD | 1,769,217 | 1.13 x 235 | 7 | 1,637 | |
| Vivacom Bulgaria EAD | 1,544,454 | 1.51 x 233 | 9 | 1,015 | |
| "Cooolbox" AD | 187,136 | 0 | 1 | 128 | |
| 4 | Geodim Ltd. | 108,288 | 0 | 1 | 190 |
| 5 | Bulgarian Research and Education Network Association (BREN) | 90,368 | 232 | 1 | 51 |
| 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. | 67,079 | 0 | 1 | 170 |
| 9 | UltraNET Ltd | 64,256 | 0 | 1 | 185 |
| 10 | "Traffic Broadband Communications" Ltd. | 62,464 | 0 | 1 | 52 |
| 11 | Angel Soft OOD | 59,648 | 0 | 1 | 110 |
| 12 | Evolink AD | 56,832 | 233 | 1 | 32 |
| 13 | Digital Systems Ltd | 50,432 | 232 | 1 | 6 |
| 14 | Neterra Ltd. | 47,362 | 232 | 1 | 175 |
| 15 | Geo BG Net SPLtd. | 43,520 | 0 | 1 | 138 |
| 16 | "NOVATEL" EOOD | 42,752 | 1.13 x 235 | 1 | 38 |
| 17 | M SAT Cable SA | 39,424 | 232 | 1 | 23 |
| 18 | ESCOM Ltd. - Haskovo | 37,889 | 232 | 1 | 150 |
| 19 | Rimex Ltd. | 32,7680 | 0 | 1 | 18 |
| 20 | NETGUARD LLC | 32,514 | 232 | 3 | 85 |