| Providers on ISO NE OASIS |
| Provider Code | Provider Name |
| BHE | Bangor Hydro Electric Company |
| BECO | Boston Edison Company |
| CELC | Cambridge Electric Light Company |
| CMP | Central Maine Power |
| CVPS | Central Vermont Public Service Corp. |
| CZN | Citizens Utilities Company |
| COM | Commonwealth Electric Company |
| CSC | Cross-Sound Cable Company |
| FGE | Fitchburg Gas & Electric |
| GMP | Green Mountain Power Corporation |
| MEPC | Maine Electric Power Company |
| MPSC | Maine Public Service Company |
| NEP | New England Power Company |
| NRTG | New England Power Pool |
| NU | Northeast Utilities System Companies |
| UI | United Illuminating |
| UES | Unitil Energy Systems |
| VELC | Vermont Electric Power Company |