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 | 1,598,976 | 0 | 1 | 72 | |
| MIC TANZANIA LTD | 144,896 | 233 | 1 | 37 | |
| TANZANIA TELECOMMUNICATIONS CO. LTD | 144,128 | 0 | 1 | 89 | |
| 4 | Simbanet (T) Limited | 114,944 | 1.5 x 233 | 2 | 90 |
| 5 | Vodacom Tanzania Ltd | 67,584 | 0 | 1 | 6 |
| 6 | Tanzania Education And Research Network | 43,008 | 216 | 1 | 35 |
| 7 | Zanzibar Telecom(Zantel) | 37,632 | 232 | 1 | 24 |
| 8 | Viettel Tanzania PLC | 25,856 | 0 | 1 | 34 |
| 9 | Aptus Solutions Ltd | 25,344 | 232 | 1 | 43 |
| 10 | Cats-Net Limited | 22,528 | 232 | 1 | 18 |
| 11 | Habari Node Public Limited | 15,616 | 232 | 1 | 30 |
| 12 | Milan Cable | 13,312 | 0 | 1 | 28 |
| 13 | WIA Tanzania | 12,544 | 232 | 1 | 4 |
| 14 | University of Dar es Salaam | 12,288 | 232 | 1 | 4 |
| 15 | e-Government Authority | 11,520 | 1.25 x 232 | 1 | 24 |
| 16 | Africa Online (T) Ltd | 9,216 | 0 | 1 | 4 |
| 17 | Bell Communications Ltd | 6,144 | 232 | 1 | 25 |
| 18 | Computer Sales & Services | 5,888 | 0 | 1 | 13 |
| 19 | Maas Computers and Networks Ltd | 4,608 | 233 | 1 | 17 |
| 20 | Gadgetronix.Net Ltd | 4,096 | 0 | 1 | 9 |