SpaceX’s 600MHz spectrum route runs into FCC deadlines and gaps

New Street Research says Bluewater Wireless holds 66 unbuilt licences in the US 600MHz band and faces an FCC build deadline of July 3, 2028. For SpaceX, that is a possible low-band entry point, subject to construction and regulatory conditions.

SpaceX wants a terrestrial mobile layer to complement Starlink, and it needs more spectrum if elusive wholesale MVNO deals with major carriers stay out of reach. Its proposed purchase of key 800MHz low-band spectrum from Grain Management could turn it into a major mobile carrier, in the company’s view.

What makes the 600MHz band useful?

New Street’s latest registration-required spectrum prospector report asks whether SpaceX can reach the market through a less brute-force approach. It sees Comcast and Bluewater’s 600MHz holdings as capable of meaningfully improving SpaceX’s low-band coverage layer.

The licences trace to the FCC’s 2017 auction of UHF television spectrum, and T-Mobile holds most of them. AT&T picked up 20MHz in 600MHz through its recent EchoStar spectrum acquisition.

When could SpaceX close a deal?

In 2023, T-Mobile agreed to lease and eventually purchase some, potentially all, of Comcast’s 600MHz holdings. The lease runs until 2027; Comcast can end the optional sale by serving a lease-termination notice if another buyer offers more. Its no-shop protection for the optional licences lapsed in March 2024.

No closing can occur before month 54 of the lease, around April 2028, with an outside date of April 12, 2029. A successor buyer would inherit an uncertain T-Mobile wind-down rather than clean spectrum, New Street said.

What must Bluewater build?

Bluewater’s 66 unbuilt licences carry a July 3, 2028 FCC deadline. New Street says a prospective buyer would need to build fast or win a waiver.

How much coverage would it buy?

A purchase of that spectrum could add depth in Houston, Atlanta, Detroit and Denver. Coverage would remain thin and fragmented in Los Angeles, Dallas, San Diego and St. Louis because of geographic holes, making the improvement uneven.

SpaceX would also avoid waiting for new phones to support the band, since mobile devices already handle 600MHz. T-Mobile and AT&T could pursue the same assets, though, and incumbents may resist ceding them to a rising rival.

Is SpaceX building coverage or sending a signal?

New Street’s analyst offered a blunt test of SpaceX’s intentions: “Our read is this could be a sensible bolt-on if SpaceX is serious about terrestrial, and a ‘cheap’ signaling device if the real goal is an MVNO.” The same spectrum could support a standalone network, combine with satellite service, or give SpaceX leverage in wholesale talks.

Two checkpoints matter most: Bluewater’s July 3, 2028 FCC deadline and Comcast’s remaining FCC filings. Each filing shuts the door on callable licences, while Comcast can still exit the optional sale if offered a better price.

The motive remains unclear: SpaceX may want owned coverage, or it may be trying to bring AT&T, T-Mobile or Verizon to the table for an MVNO deal. New Street says the spectrum can support several narratives, including a standalone terrestrial layer, a combined satellite-terrestrial service or wholesale leverage.

John Strand, CEO of Strand Consult, said in a report examining ten myths about Starlink that the purchases “may be valuable for an owned terrestrial coverage layer, as leverage in wholesale negotiations, or to support satellite connectivity where permitted.”

What about upper C-band and 3.45GHz?

SpaceX is also expected to participate in the FCC’s auction of upper C-band spectrum. Clearing the band, accommodating mobile devices and completing the associated work will take years. That route offers little immediate relief for the terrestrial build.

New Street plans to examine other possibilities, including 3.45GHz, in future spectrum prospector installments. The 600MHz deadlines arrive sooner; upper C-band remains years away.

What is Virgin Media O2 testing?

Virgin Media O2 is separately judging Ericsson against Nokia in AI-RAN. It has installed an Nvidia processor at a busy Nokia site in central London to determine whether the setup delivers genuine AI benefits.

For SpaceX, the next checkpoints are the remaining Comcast filings, Bluewater’s July 3, 2028 build deadline and the upper C-band clearing timetable. Until access terms, waivers and device readiness become clear, 600MHz remains a plausible bolt-on rather than a committed terrestrial rollout.