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 | 1,247,232 | 232 | 1 | 109 | |
| Vodacom Tanzania Ltd | 209,408 | 232 | 1 | 78 | |
| MIC TANZANIA LTD | 191,232 | 233 | 2 | 109 | |
| 4 | TANZANIA TELECOMMUNICATIONS CO. LTD | 170,752 | 232 | 1 | 201 |
| 5 | Simbanet (T) Limited | 111,872 | 233 | 2 | 82 |
| 6 | Tanzania Education And Research Network | 41,728 | 232 | 1 | 38 |
| 7 | Viettel Tanzania PLC | 30,464 | 0 | 1 | 53 |
| 8 | Habari Node Public Limited | 23,808 | 232 | 1 | 48 |
| 9 | Aptus Solutions Ltd | 19,456 | 1.02 x 232 | 1 | 19 |
| 10 | Cats-Net Limited | 14,848 | 0 | 1 | 27 |
| 11 | WIA Tanzania | 12,544 | 232 | 1 | 4 |
| 12 | University of Dar es Salaam | 12,288 | 232 | 1 | 3 |
| 13 | e-Government Authority | 10,496 | 1.25 x 232 | 1 | 23 |
| 14 | ECHOTEL TANZANIA LIMITED | 9,728 | 0 | 1 | 6 |
| 15 | Flashnet Technologies Limited | 8,448 | 232 | 1 | 20 |
| 16 | Milan Cable | 8,192 | 0 | 1 | 17 |
| 17 | Bell Communications Ltd | 6,144 | 232 | 1 | 7 |
| 18 | Computer Sales & Services | 5,888 | 0 | 1 | 13 |
| 19 | Simply Computers Tanzania Ltd | 4,096 | 0 | 1 | 16 |
| 20 | Gadgetronix.Net Ltd | 4,096 | 0 | 1 | 9 |