| Type of Utility | Total |
| (100) Investor-Owned Electric Utilities | 4 |
| (200) Rural Electric Cooperative Corporation | 21 |
| (300) Gas Distribution Companies | 20 |
| (310) Intrastate Transmission | 30 |
| (320) Master Meter Gas | 105 |
| (330) Municipal Gas Distribution | 52 |
| (340) Gas Gathering | 14 |
| (350) Farm Taps | 17 |
| (360) Hazardous Liquids Inter | 9 |
| (361) Hazardous Liquids Intra | 2 |
| (362) Gas Transmission Interstate | 11 |
| (400) Paging | 3 |
| (410) Cellular | 139 |
| (500) Local Exchange Carriers | 20 |
| (505) Competitive Local Exchange Carrier | 250 |
| (510) Long Distance Carriers | 184 |
| (530) Operator Services | 19 |
| (600) Investor-Owned Water Companies | 5 |
| (700) Water Districts | 108 |
| (800) Water Associations | 20 |
| (880) Municipal Water Utilities | 100 |
| (900) Sewer Utilities | 34 |
| Total | 1167 |