The US Federal Communications Commission (FCC) adopted final rules for auctioning 160MHz of spectrum in the upper C-Band, setting the stage for an auction to close by July 2027 and creating what the regulator called a harmonised 5G super band spanning 440MHz when combined with existing holdings.
The rules apply to the 3.98GHz to 4.14GHz range, and build on the FCC’s lower C-Band auction conducted during President Donald Trump’s first term.
Combining the lower C-Band with the newly cleared upper C-Band will create a contiguous 3.70-4.14GHz block which the FCC described as a larger swath of licensed, 5G-grade mid-band spectrum than any other industrialised country holds.
“America’s wireless leadership is back,” FCC chair Brendan Carr stated. “Freeing up this spectrum drives down prices, raises speeds, and enhances competition. Thanks to President Trump’s leadership, America will once again lead the world in wireless.”
The commission announced it will auction 60% more spectrum than the 100MHz minimum required by law, a move it stated would raise tens of billions of dollars in additional proceeds for the US Treasury to support deficit reduction and other national priorities.
The auction will offer 3,248 new flexible-use licences across the contiguous US.
Winning bidders will be able to launch wireless services in the top 75 US markets starting December 2030, with remaining markets following from July 2031, a timeline the FCC said is faster than originally expected.
The FCC estimated the spectrum release could generate at least $422 billion in GDP, 2.4 million new jobs and $621 billion in consumer surplus.
Aviation concerns
In 2021, major airline industry players pressed the government and regulators to delay the launch of 5G in C-Band over interference fears.
To protect aviation safety systems operating in adjacent frequencies, the FCC worked closely with the Federal Aviation Administration on rules governing coexistence between wireless operations and radio altimeters in the nearby 4.2GHz to 4.4GHz band.
The FAA said the FCC had incorporated key safeguards to protect the frequencies aircraft altimeters rely on, and the rules include rebates to help the aviation sector retrofit and upgrade altimeter equipment. The FCC said incentive payments to satellite operators being cleared from the band will be lower in aggregate than those paid following the lower C-Band auction, reflecting the smaller amount of spectrum involved, though roughly proportionate to it.
The rules follow a process that began last year under the FCC’s renewed auction authority as part of President Trump’s so called One Big Beautiful Bill Act, building on a Notice of Proposed Rulemaking adopted last November.
Commission staff are expected to seek comment on auction procedures in the coming days before finalising them ahead of the auction.
The order was adopted by a vote of FCC chairman Brendan Carr and commissioner Olivia Trusty in favour, with commissioner Anna Gomez approving in part and dissenting in part.
Space modernisation order
Separately, the FCC voted to overhaul its space and earth station licensing process, replacing the legacy Part 25 rules in their entirety with a new Part 100 framework rebuilt from first principles. The commission said it completed the systematic, industry-wide regulatory overhaul in roughly 18 months, a pace it described as historically unprecedented for a federal agency.
The new rules are intended to speed up space and earth station licensing through a faster, more predictable process the FCC likened to a “licensing assembly line”, while also enhancing space safety and removing outdated regulations to support the country’s commercial space sector.
The FCC framed the reform as part of a broader push under the Trump administration to strengthen US leadership in space.
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