SpaceX's constellation ended 2025 near 450 Tbps of total capacity. With Starship-launched V3 satellites adding ~60 Tbps per flight, we model the network's trajectory through 2035 — and what it means for Comcast, Charter, AT&T, Verizon and T-Mobile.
Starlink's network capacity reached roughly 445–450 Tbps by late 2025, up from about 40 Tbps at the end of 2022 — a 10x expansion in three years. The company currently deploys about 5 Tbps of new capacity per week using Falcon 9 launches of second-generation (V2 Mini) satellites; in 2025 alone, more than 3,000 V2 Minis added roughly 270 Tbps.
The step change arrives with the third generation. Each V3 satellite is designed for over 1 Tbps of downlink (10x a V2 Mini) and 200+ Gbps of uplink (24x), with a single Starship launch projected to add ~60 Tbps — more than 20 times what a Falcon 9 mission adds today. SpaceX targeted the first half of 2026 for initial V3 launches. Separately, new FCC power-flux rules adopted in spring 2026 allow up to eight satellites to serve the same area simultaneously (versus effectively one before), a potential ~7x boost in usable capacity over the U.S. without launching anything.
We model three scenarios driven almost entirely by one variable: Starship launch cadence dedicated to Starlink V3. Assumptions: V2 Mini launches (~5 Tbps/week) taper as Starship ramps; each Starship flight carries ~60 V3 satellites (~60 Tbps); satellites deorbit after ~5 years, so retirements increasingly offset gross additions late in the window. The base case is calibrated to New Street Research's independent assessment of ~20,000 V3-class satellites and ~29x capacity growth from 2025 to 2034.
Starship suffers continued delays; Falcon 9 carries the load through 2028 with V3 flights ramping to only ~15–20/yr by 2030. Supports ~90–120M subscribers.
Starship reaches ~15 Starlink flights in 2027, ~40–45/yr by 2030. Cumulative ~18–20k V3 satellites by 2034; ~29x capacity vs. 2025. Supports ~200M subscribers.
Consistent with SpaceX's stated ambition of ~400 Starship flights in four years, a majority devoted to Starlink, plus a higher-capacity V4 late in the window.
| Year | Falcon 9 flights | Starship flights | Satellites added | Gross Tbps added | Tbps retired | Net capacity (Tbps) | Subs supported* |
|---|---|---|---|---|---|---|---|
| 2023 (actual) | ~63 | 0 | ~1,900 | ~55 | ~5 | ~90 | ~4M |
| 2024 (actual) | ~89 | 0 | ~2,300 | ~100 | ~10 | ~180 | ~8M |
| 2025 (actual) | ~100+ | 0 | ~3,000 | ~270 | ~15 | ~450 | ~20M |
| 2026E | ~90 | ~5 | ~2,450 | +560 | −60 | ~950 | ~42M |
| 2027E | ~60 | ~15 | ~2,350 | +1,070 | −70 | ~1,950 | ~85M |
| 2028E | ~35 | ~25 | ~2,350 | +1,590 | −140 | ~3,400 | ~150M |
| 2029E | ~15 | ~35 | ~2,450 | +2,140 | −240 | ~5,300 | ~200M+ |
| 2030E | ~5 | ~40 | ~2,500 | +2,420 | −420 | ~7,300 | ~200M+ |
| 2031E | 0 | ~45 | ~2,700 | +2,700 | −1,000 | ~9,000 | >200M |
| 2032E | 0 | ~45 | ~2,700 | +2,700 | −1,000 | ~10,700 | >200M |
| 2033E | 0 | ~45 | ~2,700 | +2,700 | −1,200 | ~12,200 | >200M |
| 2034E | 0 | ~45 | ~2,700 | +2,700 | −1,700 | ~13,200 | >200M |
| 2035E | 0 | ~45–50 (V3/V4) | ~2,800 | +3,000 | −1,800 | ~14,500–16,000 | >200M |
*Subscribers supported at current provisioning ratios (~44,000 subs per Tbps, derived from ~20M subs on ~450 Tbps). Actual serviceable subscribers depend on geographic distribution of demand vs. beam capacity — the constellation cannot concentrate all capacity over one country. Falcon 9 carries ~24–28 V2 Minis per flight (~2.5–3 Tbps); Starship carries ~60 V3s (~60 Tbps). Satellites retire after ~5 years, so V2 Minis launched 2023–2026 roll off 2028–2031, and early V3s begin retiring in 2031 — the drag visible in later years.
Comcast, Charter, AT&T, Verizon and T-Mobile do not publish a single network-capacity figure, because wired networks scale locally. A single modern fiber pair carries multiple terabits; a fiber ISP provisions ~10 Gbps to a group of ~32 homes and simply adds equipment where demand grows. Comcast has historically doubled network capacity roughly every 18 months, engineering for peak-hour traffic and planning 12–24 months ahead of ~40–45% annual usage growth. In effect, terrestrial capacity is unbounded per neighborhood; Starlink's is a fixed budget per square mile of sky.
The fair comparison is therefore subscribers and share, where Starlink remains small in the U.S. but is the fastest-growing platform globally (2.3M subs in 2023 → 4.4M in 2024 → 8.9M in 2025 → 12M+ in mid-2026).
Cable is the share donor. Both Charter and Comcast peaked in 2023 (32.3M and 30.6M subscribers) and have each lost over a million since. Q1 2026: Comcast −65k (its best quarter in two years after simplified five-year pricing), Charter −120k. Switching panels show cable brands with deeply negative net switching rates, while fixed wireless was the disruptor: the Big 3 carriers now serve 20M+ FWA subscribers with spectrum capacity for up to 32M. Fiber wins where it exists — AT&T reached 37M fiber passings (targeting 60M by 2030) after acquiring Lumen's mass-market assets, and Verizon closed its $20B Frontier deal in January 2026, pushing fiber connections to ~10.8M. Consolidation is accelerating on both sides: Cox–Charter approved, a Comcast–Charter combination openly debated by analysts.
Roughly doubling capacity in 2026 (to ~950 Tbps base case) plus the FCC's 8-satellite EPFD reform lets Starlink retire congestion surcharges, open capped suburban/exurban markets, and market gigabit-tier service. Promotional pricing ($35/mo introductory residential offers) makes it a direct FWA competitor for price-sensitive households — pressuring T-Mobile and Verizon's FWA growth at the margin and giving cable yet another low-price alternative to defend against.
At 5–9 Pbps, Starlink's U.S.-allocable capacity could plausibly support 8–15M domestic subscribers at cable-like typical speeds. That's enough to make it a top-5 U.S. ISP by subscriber count and a permanent pricing check on every terrestrial player — while still structurally unable to match fiber's per-home capacity in dense metros. Expect its share gains to come disproportionately from cable's rural/exurban footprint and from FWA churn, not from fiber.
At 13+ Pbps and 200M+ global subscriber capability, growth constraints shift from the network to marketing, terminal economics, and terrestrial competition in developed markets — the same limits New Street Research flags in its 100M-subscriber-by-2034 forecast. The most durable outcome: fiber holds the premium tier, a merged cable sector defends the middle with converged mobile bundles, and Starlink + FWA commoditize the value tier while Starlink takes near-total share of the truly rural and mobile (RV, maritime, aviation, direct-to-cell) segments globally.