Carrier Communications - Offer antenna sites for lease throughout California . Includes a listing of available sites together with photographs . Omni-Tek, Inc. - Antenna site management company. Includes corporate summary, locations, and FAQs. Message Center Management, Inc. - Manages wireless communication site facilities (antenna sites) including towers, signs, billboards, and building rooftops. Shaffer Communication Services, Inc. - Provides a full range of consulting, construction and maintenance services for the communications and broadcast industries. SecuraSite, LLC. - A provider of site acquisition, zoning, and architectural and engineering services to the wireless telephone and broadband wireless industries. Entire Network Solutions - Manages rooftop sites for owners and marketing to the Australian telecommunications and wireless industries. Fryer's Tower Source - Directory of antenna tower sites throughout the US with data on leasing contacts. Requires registration