List of the top 20 organizations with the largest IP allocations in Tanzania
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Airtel Tanzania | 1,265,408 | 232 | 1 | 84 | |
| MIC TANZANIA LTD | 177,664 | 1.5 x 233 | 2 | 68 | |
| TANZANIA TELECOMMUNICATIONS CO. LTD | 157,952 | 232 | 1 | 151 | |
| 4 | Simbanet (T) Limited | 107,776 | 1.5 x 233 | 2 | 91 |
| 5 | Vodacom Tanzania Ltd | 80,896 | 0 | 1 | 13 |
| 6 | Tanzania Education And Research Network | 48,384 | 232 | 1 | 17 |
| 7 | Viettel Tanzania PLC | 28,416 | 0 | 1 | 45 |
| 8 | Habari Node Public Limited | 22,784 | 232 | 1 | 44 |
| 9 | Aptus Solutions Ltd | 21,504 | 1.02 x 232 | 1 | 26 |
| 10 | Cats-Net Limited | 16,640 | 232 | 1 | 35 |
| 11 | WIA Tanzania | 12,800 | 232 | 1 | 5 |
| 12 | e-Government Authority | 9,728 | 0 | 1 | 15 |
| 13 | ECHOTEL TANZANIA LIMITED | 9,728 | 0 | 1 | 6 |
| 14 | Bell Communications Ltd | 6,144 | 232 | 1 | 25 |
| 15 | Computer Sales & Services | 5,888 | 0 | 1 | 13 |
| 16 | Flashnet Technologies Limited | 4,352 | 232 | 1 | 12 |
| 17 | Simply Computers Tanzania Ltd | 4,096 | 0 | 1 | 16 |
| 18 | Gadgetronix.Net Ltd | 4,096 | 0 | 1 | 9 |
| 19 | Milan Cable | 4,096 | 0 | 1 | 16 |
| 20 | ZAPTECH LIMITED | 3,072 | 0 | 1 | 7 |