| Naics index | Naics index description |
|---|---|
| 561421 | Telephone call forwarding services |
| 561421 | Voice mailbox services |
| 561421 | Wakeup call services |
| 561422 | Telemarketing bureaus |
| 561422 | Customer service call centers |
| 561422 | Floral wire services (i.e., telemarketing services) |
| 561422 | Online customer service centers |
| 561422 | Telemarketing services on a contract or fee basis |
| 561422 | Telephone call centers (e.g., customer service centers, telemarketing services) |
| 561422 | Telephone solicitation services on a contract or fee basis |