| Type of Utility | Total |
| (100) Investor-Owned Electric Utilities | 4 |
| (200) Rural Electric Cooperative Corporation | 21 |
| (300) Gas Distribution Companies | 28 |
| (310) Intrastate Gas Pipeline Companies | 49 |
| (320) Municipally Owned/Colleges and Universities/Housing Authorities | 172 |
| (400) Paging | 4 |
| (410) Cellular | 69 |
| (500) Local Exchange Carriers | 20 |
| (505) Competitive Local Exchange Carrier | 187 |
| (510) Long Distance Carriers | 291 |
| (530) Operator Services | 34 |
| (560) Customer-Owned Coin Operated Telephones (COCOTs) | 314 |
| (600) Investor-Owned Water Companies | 8 |
| (700) Water Districts | 117 |
| (800) Water Associations | 22 |
| (880) Municipal Water Utilities | 94 |
| (900) Sewer Utilities | 77 |
| Total | 1511 |