| 517121 |
Microwave telecommunication resellers |
| 517121 |
Mobile virtual network operators (MVNOs) (except agents) |
| 517121 |
Pre-paid calling cards, telecommunications resellers |
| 517121 |
Resellers, telecommunication (except satellite telecommunications and agents for wireless telecommunications services) |
| 517121 |
Telecommunications resellers (except satellite telecommunications and agents for wireless telecommunications services) |
| 517121 |
Telephone communications resellers (except satellite telecommunications and agents for wireless telecommunications services) |
| 517121 |
Wired telecommunication resellers |
| 517121 |
Wireless telecommunications resellers (except satellite telecommunications and agents) |
| 517122 |
Agents for mobile virtual network operators (MVNOs) |
| 517122 |
Agents for wireless telecommunications carriers |