California Advanced Services Fund (CASF) Infrastructure Grant

Project Proposals Are Being Accepted Now

Infrastructure Funding Overview

CASF grants are designed to assist in the building and/or upgrading of broadband infrastructure in areas that are unserved by existing broadband providers. AB 1665 provides the commission the authority to award grants to fund all or a portion of construction costs for projects in userved areas.  AB 1665 allows the commission to determine, on a case-by-case basis, the level of funding to be provided for a project and directs the commission to consider factors including, but are not limited to, the location and accessibility of the area, the existence of communication facilities that may be upgraded to deploy broadband, and whether the project makes a significant contribution to achievement of the program goal.

  • An “unserved” area is an area where no wireline or wireless facilities-based provider offers service at advertised speeds of at least 6 mbps download and 1 mbps upload.
  • AB 1665 directs the commission to give preference to unserved areas where
    • Internet connectivity is available only through dial-up service or
    • there is no Internet connectivity. 

For a brief history of the California Advanced Services Fund, please visit this page.

Infrastructure Funding Eligibility

CASF funding is available to entities with a Certificate of Public Convenience and Necessity (CPCN) that qualify as a "telephone corporation" as defined under P.U. Code section 234 or wireless carriers who are registered with the Commission (i.e., hold a WIR). Wireless carriers need not obtain a CPCN to qualify for CASF funding. For more information on how to register with the Commission see 'Information for Telecommunications Applicants and Registrants in California'.

CASF funding is also available to non-telephone corporations which are facilities based broadband service providers. The Commission shall use the National Telecommunications and Information Administration's (NTIA) definition of a facilities-based broadband service provider, which is generally defined as any entity providing internet access service or middle mile transport, over its own fixed or wireless facilities to residences, businesses, or other institutions. However, non-telephone corporations must provide last-mile broadband access to households that are unserved by an existing facilities-based provider and only receive funding to provide access to households that are unserved or underserved.

The Commission will consider applications from satellite service providers provided that the applicants are able to prove functionality, and are able to meet the speeds required.

Applying for Funds

Applications need to be submitted on the CASF portal at

Applicants need to also send hard copies (postmarked by the date or earlier of the online application submission) to the following two offices:

Communications Division
Attn: California Advanced Services Fund
California Public Utilities Commission
505 Van Ness Ave.
San Francisco, CA 94102

AND to:

Office of Ratepayer Advocates
Re: California Advanced Services Fund
California Public Utilities Commission
505 Van Ness Ave.

San Francisco, CA 94102


The mailed document should follow the format of the checklist and conform to Rule 1.5 of the Commission’s Rules of Practice and Procedure. Documents tendered for filing must be typewritten, printed, or reproduced on paper 8 ½ inches wide and 11 inches long. Any larger attachments must be legibly reduced or folded to the same size. The type must be no smaller than 10 points. The impression must use 1 ½ -line or double spacing, except that footnotes and quotations in excess of a few lines may be single-spaced. Both sides of the paper may be used. A document of more than one page must be bound on the left side or upper left-hand corner. If a transmittal letter is submitted (see Rule 1.13(a)), it must not be bound to the tendered document. All copies must be clear and permanently legible.

Applicants must also submit their project summaries to a distribution list maintained by Communications Division staff.

Prospective applicants who have questions about the application process may send an email to

Project Development Resources

The CASF Application Tool in the California Interactive Broadband Availability Map can be used to select simple proposed project areas and export key information to an excel workbook. Output from the tool can then be pasted into the CASF Application Average Speed Calculator Excel Template to summarize information for infrastructure grant applications. 

Statewide datasets can also be downloaded for more complex project development and analysis:

  • CASF Application Tool GIS data
    • Census Blocks
    • Census Block Groups
    • Community Anchor Institutions
  • Census Block CASF Application Tool data
  • Census Block Group CASF Application Tool data
  • Community Anchor Institutions
  • More information can be found at Broadband Maps and GIS Data

Annual Right Of First Refusal (ROFR) Letter

The Right of First Refusal (ROFR) Resolution T-17590 does not prohibit existing providers from submitting the ROFR letter indicating an intent to build in a given area beyond the 180 days and before the next ROFR process begins. However, Commission receipt of the letter will not bar the Commission from approving a grant to build in the same area.

Pre-Award Submissions and Funded Projects

CASF Applications (Project Summaries)

Right of First Refusal Submissions from Incumbent Providers

Commission-Approved CASF Projects  

Immigration Guide