CNS shares RDOF Challenged Census blocks

CNS has a pretty complete map of RDOF Challenged Census blocks. What does that mean? RDOF (Rural Digital Opportunity Fund) is the FCC’s largest distribution of USF (Universal Service Funds). There are two phases:

  • Phase 1: Will provide up to $16.4 billion
  • Phase 2: Will provide at least $4.4 billion

The FCC will award RDOF funds through a descending clock, reverse auction process. Eligible areas include those without current (or already funded) access to adequate broadband service, defined by the FCC as 25 Mbps downstream and 3 Mbps upstream (25/3). CNS’s map shows those areas whose eligibility is being challenged…

Their map shows locations of the approximately 280,000 census blocks identified by ISPS or other entities, filed with the FCC to challenge potentially available census blocks  included in the upcoming RDOF auction. Not all challenge letters provided sufficient and/or accurate data for accurate mapping, and thus, this map, while containing a significant amount of data, is not fully complete. Please see the “information” tab for disclaimer and additional limitations.

For a more detailed map, or questions, please contact Paul Solsrud

[Added May 6 noon]

Paul just shared a list of the largest challengers by the number of blocks they challenged and a list of all challengers. So interesting!

This entry was posted in Building Broadband Tools, FCC, Vendors by Ann Treacy. Bookmark the permalink.

About Ann Treacy

Librarian who follows rural broadband in MN and good uses of new technology (, hosts a radio show on MN music (, supports people experiencing homelessness in Minnesota ( and helps with social justice issues through Women’s March MN.

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