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 | 195,328 | 1.5 x 233 | 2 | 129 | |
| TANZANIA TELECOMMUNICATIONS CO. LTD | 169,472 | 232 | 1 | 215 | |
| 4 | Simbanet (T) Limited | 110,848 | 234 | 2 | 82 |
| 5 | Airtel Tanzania | 70,144 | 232 | 1 | 74 |
| 6 | Tanzania Education And Research Network | 42,496 | 232 | 1 | 41 |
| 7 | Viettel Tanzania PLC | 33,792 | 0 | 1 | 66 |
| 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 | Milan Cable | 7,936 | 0 | 1 | 16 |
| 17 | Computer Sales & Services | 5,888 | 0 | 1 | 13 |
| 18 | Flashnet Technologies Limited | 5,888 | 232 | 1 | 15 |
| 19 | Net Solutions Limited | 4,096 | 0 | 1 | 9 |
| 20 | Simply Computers Tanzania Ltd | 4,096 | 0 | 1 | 16 |