| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Airtel Tanzania | 1,271,552 | 232 | 1 | 108 | |
| Vodacom Tanzania Ltd | 209,408 | 232 | 1 | 78 | |
| MIC TANZANIA LTD | 188,672 | 1.5 x 233 | 2 | 100 | |
| 4 | TANZANIA TELECOMMUNICATIONS CO. LTD | 166,144 | 232 | 1 | 183 |
| 5 | Simbanet (T) Limited | 115,712 | 232 | 2 | 88 |
| 6 | Tanzania Education And Research Network | 45,056 | 232 | 1 | 51 |
| 7 | Viettel Tanzania PLC | 30,208 | 0 | 1 | 52 |
| 8 | Habari Node Public Limited | 23,040 | 232 | 1 | 45 |
| 9 | Aptus Solutions Ltd | 19,456 | 1.02 x 232 | 1 | 20 |
| 10 | Cats-Net Limited | 14,848 | 232 | 1 | 28 |
| 11 | University of Dar es Salaam | 12,288 | 232 | 1 | 3 |
| 12 | WIA Tanzania | 12,288 | 0 | 1 | 2 |
| 13 | e-Government Authority | 11,008 | 232 | 1 | 21 |
| 14 | ECHOTEL TANZANIA LIMITED | 9,728 | 0 | 1 | 6 |
| 15 | Milan Cable | 8,192 | 0 | 1 | 17 |
| 16 | Flashnet Technologies Limited | 6,144 | 232 | 1 | 15 |
| 17 | Bell Communications Ltd | 6,144 | 232 | 1 | 25 |
| 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 |