This site provides information on accessing and using the Broadband Serviceable Location Fabric (BSLF or fabric) and specific location information for the Federal Funding Account.

A. Access the Fabric

The National Telecommunications Information Administration (NTIA) licenses the fabric at no cost for use by a broad range of entities here. For further information, please review the Guidance on accessing the fabric.

For NTIA-related questions, contact

For questions related to the Last Mile Federal Funding Account, contact

B. Compare the Fabric Location IDs with California Served and Unserved Status Location IDs

Once an entity has access to the fabric, served and unserved status can be mapped to the fabric Location IDs.  The following data files with the Federal Funding Account served and unserved status are below:

C. Guidance on Mapping Location IDs and Project Areas

An entity may download the Census Block and Project Area attributes with a Plan ID from the Applicant Tool.

The fabric, Location IDs, the Census Block, and Project Area attributes can then be merged into a single spatial file.

Explainer on use of the fabric and information about spatially joining and mapping files is available in the Guidance on Mapping the Translator File to Location IDs.

Other Information

The Broadband Equity, Access and Deployment Program and California Advanced Services Fund Infrastructure Account  programs have different definitions for eligible unserved and underserved locations.

The Commission filed comments with federal agencies that the fabric should be publicly available (see, e.g., Federal Communications Commission and National Telecommunications Information Administration comments September 2019 and May 2023 at 7.6: Transparency Requirements).


Email questions about the program to: