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 | 1,772,544 | 1.33 x 235 | 6 | 1,672 | |
| Vivacom Bulgaria EAD | 1,552,640 | 1.51 x 233 | 8 | 1,301 | |
| Cooolbox AD | 186,368 | 232 | 1 | 123 | |
| 4 | Bulgarian Research and Education Network Association (BREN) | 89,856 | 232 | 1 | 59 |
| 5 | Geodim Ltd. | 89,344 | 0 | 1 | 153 |
| 6 | HZ Hosting Ltd | 80,896 | 221 | 4 | 262 |
| 7 | UltraNET Ltd | 76,800 | 0 | 1 | 199 |
| 8 | Comnet Bulgaria Holding Ltd. | 72,960 | 1.13 x 235 | 2 | 157 |
| 9 | Net-Surf.net Ltd. | 71,431 | 0 | 1 | 184 |
| 10 | Angel Soft OOD | 59,392 | 0 | 1 | 109 |
| 11 | Evolink EAD | 57,858 | 233 | 1 | 38 |
| 12 | Digital Systems Ltd | 50,432 | 232 | 1 | 6 |
| 13 | Geo BG Net SPLtd. | 48,640 | 0 | 1 | 144 |
| 14 | "NOVATEL" EOOD | 45,312 | 1.13 x 235 | 1 | 28 |
| 15 | Neterra Ltd. | 44,289 | 232 | 3 | 159 |
| 16 | Cifrova Kabelna Korporacia EOOD | 44,288 | 232 | 1 | 16 |
| 17 | M SAT Cable EAD | 39,424 | 232 | 1 | 23 |
| 18 | ESCOM Ltd. - Haskovo | 37,120 | 232 | 1 | 146 |
| 19 | Optisprint OOD | 35,072 | 232 | 1 | 139 |
| 20 | Rimex Ltd. | 32,768 | 0 | 1 | 18 |