SpaceX buys 800 MHz spectrum: AT&T, Verizon and T-Mobile each fall about 6.5% after hours

SpaceX said Thursday it has agreed to buy a nationwide spectrum portfolio from Grain Management, a digital-infrastructure investor, as it pushes Starlink deeper into U.S. mobile service. In extended trading AT&T, Verizon and T-Mobile all fell by roughly the same amount, between 6.4% and 6.6%, according to Nasdaq quotes read at 6:50 PM ET.

What was announced

As CNBC reported, SpaceX described the purchase as a "license portfolio of up to 14 megahertz of paired spectrum in the 800 MHz band." The deal needs Federal Communications Commission approval. SpaceX said in a statement that the "prime low-band spectrum addresses one of the key remaining technical gaps" on the way to Starlink Mobile becoming "a major mobile carrier in the US." CNBC did not report a price, and we could not find one in the sources we read, so we do not state one.

The after-hours numbers

Two things in that table matter. First, the carriers were all up on the regular session, so the after-hours drop gives back more than the day's gain and then some. Second, extended-hours trading is thin, and moves of this size on a headline can narrow or widen by the next open. Treat these as where the market was trading at 6:50 PM, not as settled prices.

Why low-band spectrum is the point

Low-frequency airwaves travel farther and get through walls better than the higher bands used for fast-but-short-range service. That is why a satellite company would call it a "gap." Independent analyst Tim Farrar of TMF Associates told CNBC the deal "adds fuel to the fire in the battle between SpaceX and the mobile operators," but cautioned it is "still a very limited amount of spectrum" and that reliable building coverage in cities would require SpaceX to deploy towers on the ground.

That caveat is the number behind the number. A 6.5% fall in all three carriers prices in a future competitor, but the deal itself is 14 MHz, pending approval, with no announced launch date. CNBC said SpaceX did not immediately say when new services might begin if regulators clear the purchase.

The regulatory backdrop

CNBC noted the announcement came a day after the FCC said it would vote on a proposal to auction 25 megahertz of "prime spectrum" for satellite-to-phone services, and that the agency will vote October 29 on seeking public comment on making another 482 MHz available for supplemental coverage from space. Both proposals could also benefit Amazon, which is building its own satellite network. Last week, per CNBC, AT&T, Verizon and T-Mobile formed a joint venture to extend coverage in underserved areas via satellite, and Starlink was notably absent from it.

Who it touches

For a business owner with a handful of company phones or a rural job site with poor coverage, nothing changes tonight. Nothing here is a new plan or a new price. What it signals is that coverage in dead zones, the part of the market where carriers have had little competition, is where the new entrant is aiming. That is a multi-year story that depends on the FCC and on tower construction.

For traders, the questions to watch are the FCC's October 29 vote, any disclosure of the purchase price, and whether the carriers respond publicly. SpaceX, which went public in June and is valued above $2 trillion according to CNBC, is tracked in our earlier coverage of its debt-funded GPU build. See live quotes on our markets page.

Sources: CNBC, including SpaceX's statement; share prices from Nasdaq.com quotes read October 8, 2026 at 6:50 PM ET. Extended-hours prices are thin and may differ from the next open. This is market information, not investment advice.