California Advanced Services Fund (CASF) Infrastructure Grant

The Annual Deadline for Project Proposals is April 1

Important Information

The rules for the CASF Infrastructure Program were revised in December, 2018. Applicants may follow these links for the revised Broadband Infrastructure Account Requirements, Guidelines and Application Materials ("Program Rules") or the Commission Decision discussing the changes. An informal summary of the revised program is below, but applicants should consider the Program Rules as the official source of information. Specific questions about how to apply for funding should be directed to CASF Staff at, while other questions from prospective applicants and stakeholders should start at your local Broadband Consortium.

For a history of the California Advanced Services Fund, including relevant legislation and rulemaking, please visit this page.

Infrastructure Funding Overview

 The CASF Infrastructure Grant Account is authorized to grant $300,000,000 in surcharge revenues (total, not annually) towards infrastructure projects that will provide broadband access to no less than 98% of California households in each consortia region by December 31, 2022. The program may only fund "last-mile" projects in "unserved" areas of California. Any middle-mile funding must be found indispensable (by Staff) to a last-mile project, and unserved areas are those without service faster than 6 Mbps download and 1 Mbps upload. The program may not fund projects in a company's Right-of-First-Refusal (ROFR) area, Census Blocks with Connect America Fund (CAF) locations, or previous CASF project areas. The eligible areas for CASF grants can be easily visualized using the California Interactive Broadband Map's eligibility layer.

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.

Satellite service providers are facilities-based broadband service providers, and the Commission will consider applications from any satellite service providers able to meet the performance criteria, which require that latency be below 100ms, and that any data caps exceed 190 GBs per month.


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:

Public Advocates Office
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) must be received by January 15 of each year, detailing areas where an existing facilities-based broadband provider intends to upgrade service within 180 days. An ROFR may be renewed only with the agreement of the Commission, and only in the event of delays outside the provider’s control. Further information on how to file an ROFR is available in the Program Rules.

Pre-Award Submissions and Funded Projects

CASF Applications (Project Summaries)

Right of First Refusal Submissions from Incumbent Providers

Commission-Approved CASF Projects  

Immigration Guide