FCC Proposes Upper C-Band Rules for 2027 Auction

The Federal Communications Commission took a step toward releasing a large swath of mid-band spectrum for America’s innovators when it voted to propose rules for 5G and 6G services in the Upper C-band (3.98-4.2 GHz). This proceeding will examine a range of options for the Upper C-band, including auctioning up to 180 megahertz, with the ultimate goal of maximizing the amount of spectrum for next-gen wireless services as generational aviation safety upgrades occur in the adjacent band. This item represents a milestone in implementing the spectrum provisions of the One Big Beautiful Bill Act. The legislation requires the FCC to complete a system of competitive bidding for at least 100 megahertz in the Upper C-band no later than July 2027. To meet that deadline, the FCC proposes to leverage its highly successful framework from the first C-band proceeding.  In 2020, the FCC auctioned 280 megahertz in the lower portion of the C-band (3.7-3.98 GHz) for flexible wireless use.  That auction brought enhanced 5G to countless communities, accelerated new builds, and enabled game-changing competitive offerings for in-home broadband.  Today’s Notice of Proposed Rulemaking seeks comment on how to accommodate incumbent satellite users and other services presently in the Upper C-band.  It also explores ways to promote co-existence with adjacent band radio altimeters, along with a range of related technical issues.  The Notice reflects input and coordination from the FCC’s federal partners, including the FAA and NTIA.