Telecom stocks suffered a brutal sell-off on Friday after SpaceX announced a deal to buy a nationwide spectrum portfolio, a move that takes Elon Musk's company deeper into the US mobile market through Starlink. Verizon closed down 8.75%, its worst single day since July 2002, while T-Mobile dropped 13.27% and AT&T fell 9.81% — their worst days since 2013 and 2000 respectively, according to CNBC. SpaceX shares edged up around 1%.
The agreement, announced Thursday, covers up to 14 megahertz of paired spectrum in the 800 MHz band, purchased from investment firm Grain Management. SpaceX says the low-band airwaves fill a key technical gap and will let Starlink Mobile push a signal through walls and into buildings, turning it from a satellite partner for carriers into a potential competitor.
What the SpaceX 800 MHz spectrum deal includes
The licenses cover roughly 100% of the US population, but the amount of spectrum varies by county, ranging from 4.85 MHz to 14 MHz, according to an FCC order cited by Ars Technica. Grain Management bought the rights from T-Mobile earlier this year; T-Mobile had been required to sell them as a condition of its 2020 Sprint merger.
This purchase sits alongside 65 MHz of nationwide mid-band spectrum SpaceX is buying from EchoStar, a $17 billion deal the FCC approved in May 2026. SpaceX has also secured approval to launch 15,000 satellites for a next-generation mobile service, which it says will deliver more than 100 times the bandwidth of the current generation. Terms of the Grain deal were not disclosed.
- Up to 14 MHz of paired low-band spectrum in the 800 MHz band
- Licenses cover approximately 100% of the US population



