| |||
| Companies | Presub. lines | %of total | Cumu % |
| AT&T Companies: | 101,356,927 | 66.4 | 66.4 |
| MCI | 23,911,437 | 15.7 | 82.1 |
| SPRINT | 9,784,388 | 6.4 | 88.5 |
| LDDS Worldcom | 4,088,816 | 2.7 | 91.2 |
| Frontier Companies: | 2,348,301 | 1.5 | 92.7 |
| Excel Telecommunications, Inc. | 1,486,953 | 1.0 | 93.7 |
| Other | 9,624,355 | 6.3 | |
| Industry total | 152,601,177 | ||