List of the top 20 organizations with the largest IP allocations in Tanzania
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Vodacom Tanzania Ltd | 208,384 | 232 | 1 | 76 | |
| MIC TANZANIA LTD | 195,072 | 1.5 x 233 | 2 | 128 | |
| TANZANIA TELECOMMUNICATIONS CO. LTD | 187,136 | 232 | 1 | 284 | |
| 4 | Simbanet (T) Limited | 113,408 | 234 | 2 | 85 |
| 5 | Airtel Tanzania | 76,800 | 232 | 1 | 100 |
| 6 | Tanzania Education And Research Network | 42,496 | 232 | 1 | 41 |
| 7 | Viettel Tanzania PLC | 34,048 | 0 | 1 | 67 |
| 8 | Cats-Net Limited | 24,064 | 0 | 1 | 33 |
| 9 | Habari Node Public Limited | 19,968 | 232 | 1 | 48 |
| 10 | Aptus Solutions Ltd | 19,712 | 1.02 x 232 | 1 | 19 |
| 11 | e-Government Authority | 13,824 | 1.25 x 232 | 1 | 33 |
| 12 | WIA Tanzania | 12,288 | 232 | 1 | 3 |
| 13 | Bell Communications Ltd | 12,288 | 232 | 1 | 31 |
| 14 | University of Dar es Salaam | 12,288 | 232 | 1 | 3 |
| 15 | ECHOTEL TANZANIA LIMITED | 9,984 | 0 | 1 | 7 |
| 16 | Simply Computers Tanzania Ltd | 8,192 | 0 | 1 | 19 |
| 17 | Milan Cable | 7,936 | 0 | 1 | 16 |
| 18 | Flashnet Technologies Limited | 7,424 | 232 | 1 | 18 |
| 19 | Computer Sales & Services | 5,888 | 0 | 1 | 13 |
| 20 | Savanna Fibre (Tanzania) Ltd | 4,096 | 232 | 1 | 11 |