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 | 1,264,128 | 232 | 1 | 79 | |
| MIC TANZANIA LTD | 194,048 | 1.5 x 233 | 2 | 105 | |
| TANZANIA TELECOMMUNICATIONS CO. LTD | 147,200 | 216 | 1 | 109 | |
| 4 | Simbanet (T) Limited | 115,968 | 1.5 x 233 | 2 | 95 |
| 5 | Vodacom Tanzania Ltd | 67,584 | 0 | 1 | 6 |
| 6 | Tanzania Education And Research Network | 43,776 | 232 | 1 | 40 |
| 7 | Viettel Tanzania PLC | 25,856 | 0 | 1 | 35 |
| 8 | Habari Node Public Limited | 21,504 | 232 | 1 | 41 |
| 9 | Aptus Solutions Ltd | 20,224 | 232 | 1 | 27 |
| 10 | Cats-Net Limited | 15,360 | 232 | 1 | 30 |
| 11 | Milan Cable | 14,848 | 0 | 1 | 26 |
| 12 | WIA Tanzania | 13,056 | 232 | 1 | 6 |
| 13 | Bell Communications Ltd | 12,288 | 232 | 1 | 31 |
| 14 | University of Dar es Salaam | 12,288 | 0 | 1 | 2 |
| 15 | e-Government Authority | 11,264 | 1.25 x 232 | 1 | 23 |
| 16 | ECHOTEL TANZANIA LIMITED | 9,728 | 0 | 1 | 6 |
| 17 | Computer Sales & Services | 5,888 | 0 | 1 | 13 |
| 18 | Maas Computers and Networks Ltd | 4,608 | 232 | 1 | 13 |
| 19 | Simply Computers Tanzania Ltd | 4,096 | 232 | 1 | 20 |
| 20 | ZAPTECH LIMITED | 3,072 | 0 | 1 | 7 |