Landline Telephone Service Providers I Need Some Info Re: Residential Phone Service Providers For Byron/Hayward, California?

I need some info re: Residential Phone Service Providers for Byron/Hayward, California? - landline telephone service providers

I need information on a number of things. First, I wonder who is the provider of telephone service to wireless telephone service for residence in the area of Byron Ca ~ [(] 925) area code, and also that the service in the Hayward area ~ Ca [( 510) area code. Secondly, that the list of cellular services for those who are in these areas (and Byron Hayward live)