| Astound Broadband California | ASTBCA | Del Norte, Humboldt, Yuba, Nevada, Sutter, Placer, Yolo, El Dorado, Sonoma, Napa, Sacramento, Solano, Marin, Contra Costa, San Joaquin, San Francisco, Alameda, Stanislaus, San Mateo, Santa Clara, Santa Cruz, San Benito, Monterey, San Luis Obispo, and Santa Barbara. | California | Alameda, Contra Costa, Del Norte, El Dorado, Humboldt, Marin, Monterey, Napa, Nevada, Placer, Sacramento, San Benito, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Stanislaus, Sutter, Yolo, Yuba |
| AT&T California | ATTCA | All of California | California | Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Imperial, Inyo, Kern, Kings, Lake, Lassen, Los Angeles, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Tuolumne, Ventura, Yolo, Yuba |
| City of Santa Clara | NPSACL | AT&T Non-Participating code for
City of Santa Clara | California | Santa Clara |
| Cityside Fiber | CTYSDE | All of California | California | Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Imperial, Inyo, Kern, Kings, Lake, Lassen, Los Angeles, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Tuolumne, Ventura, Yolo, Yuba |
| Clear Connection - California | CCONCA | California - El Dorado, Shasta and Tehama counties | California | El Dorado, Shasta, Tehama |
| Extenet Systems | XNETCA | State of California
California counties :
Alameda ,
Contra Costa
Los Angeles
Marin
Mendocino
Monterey
Oakland
Orange
Riverside
San Bernardino
San Diego
San Fernando,
San Francisco
San Luis Obispo
San Mateo
Santa Clara
Santa Cruz
Ventura | California | Alameda, Contra Costa, Los Angeles, Marin, Mendocino, Monterey, Orange, Riverside, San Bernardino, San Diego, San Francisco, San Mateo, Santa Clara, Santa Cruz |
| FJS Cable Engineering Inc | FJSCBE | California, USA | California | Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Imperial, Inyo, Kern, Kings, Lake, Lassen, Los Angeles, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Tuolumne, Ventura, Yolo, Yuba |
| Healdsburg Electric | HELDEL | City of Healdsburg, Sonoma County, CA | California | Sonoma |
| Imperial Irrigation District | NPIID | AT&T Non-Participating code for Imperial Irrigation District
Imperial Valley, Coachella Valley | California | Imperial, Riverside |
| Liberty Utilities | NPLIBU | AT&T Non-Participating code for Liberty Utilities
Compton, Bellflower, Lynwood, Norwalk, Bell Gardens, Santa Fe Springs, Artesia, Willowbrook, LA County, Apple Valley, Rancho Dominguez, San Bernardino County, Yermo, Victorville | California | Los Angeles |
| PacifiCorp | PPLCA | PT/PA All Pacific Power Regions in California
-Del Norte County - Crescent City, Fort Dick, Gasquet, Klamath, Requa, Smith River
- Modoc County – Alturas. Canby, Cedarville, Davis Creek, Fort Bidwell, Lake City, Newell, Perez, Tionesta, Tulelake, Willow Ranch
- Siskiyou County – Boswick, Bray, Callahan, Cecilville, Clear Creek, Copco, Dear Horse, Dorris, Dunsmuir, Etna, Forks of Salmon, Fort Jones, Gazelle, Greenview, Grenada, Hamburg, Happy Camp, Hilt, Hornbrock, Horse Creek, Klamath River, Macdoel, McCloud, Montague, Mount Hebron, Mount Shasta, Sawyers Bar, Seiad Valley, Tennant, Weed, Yreka
-Shasta County - Big Bend, Castella, La Moine, Lakehead, Lamoine
-Trinity County – Denny, Trinity Center | California | Del Norte, Modoc, Shasta, Siskiyou, Trinity |
| San Diego Gas & Electric - Distribution | NPSGED | AT&T Non-Participating code for San Diego Gas & Electric
San Diego County, Orange County | California | Orange, San Diego |
| San Diego Gas & Electric - Transmission | NPSGET | AT&T Non-Participating code for San Diego Gas & Electric
San Diego County, Orange County | California | Orange |
| Silicon Valley Power | SILCON | City of Santa Clara, Santa Clara County | California | Santa Clara |
| Valley Electric Assoc | NPVEAC | AT&T Non-Participating code for Valley Electric Assoc (CA)
Mono, Inyo | California | Inyo, Mono |