Week in Space Data, every Friday.
Track major satellite constellations: deployments, orbital parameters, coverage, and regulatory compliance
Each satellite count shows its date and basis: catalog counts are objects in CelesTrak’s public catalog group for that constellation, synced daily; dated counts come from a cited tracking source (the same figures as How many satellites); a figure we cannot date is labelled undated.
SpaceX
United States
The largest commercial satellite constellation by active spacecraft count. Provides high-speed, low-latency broadband globally, including underserved and remote areas. Direct-to-cell service is offered in the US with T-Mobile.
Eutelsat OneWeb
United Kingdom / France
Global LEO broadband constellation now fully deployed. Merged with Eutelsat in 2023 to create a multi-orbit operator. Focuses on enterprise, government, maritime, and aviation connectivity.
Amazon
United States
Amazon's LEO broadband constellation, renamed Amazon Leo in November 2025. Two prototypes launched October 2023; production launches began April 2025 on Atlas V, followed by Falcon 9 and Ariane 6. Satellites are built at Amazon's Kirkland, WA factory (opened April 2024). Commercial service was expected to start later in 2026.
Iridium Communications
United States
Iridium NEXT replaced the original 1990s constellation, with launches from January 2017 to January 2019. 66 operational crosslinked satellites in near-polar orbits support voice, data, IoT and Iridium Certus broadband, and host payloads such as Aireon's space-based ADS-B. Garmin inReach devices use the Iridium network.
SES
Luxembourg
SES's second-generation MEO constellation, successor to the original O3b fleet, built by Boeing. Each satellite has more than 5,000 digitally formed beams and the system offers terabit-level capacity. Serves telcos, cruise lines, energy, and government customers.
Telesat
Canada
Telesat's LEO constellation for enterprise, government, maritime and aero markets. MDA is prime manufacturer of the initial 156 satellites, which are adding military Ka-band capacity; a Canadian Arctic military contract funds expansion to 225 satellites.
China SatNet (China Satellite Network Group)
China
China's national broadband mega-constellation run by state-owned China SatNet (established 2021). Test satellites launched from July 2023; production deployment began December 2024 and had reached its 26th group by September 23, 2026. No start of broadband service had been reported as of mid-September 2026.
Shanghai Spacecom Satellite Technology (SSST), trading as Spacesail
China
Shanghai-backed commercial mega-constellation, sometimes called "China's Starlink." Deployment began August 6, 2024 with 18 satellites on a Long March 6A; 238 satellites had launched on 14 launches by July 5, 2026, with 22 counted as failed by Jonathan McDowell. No commercial service had been reported as of mid-September 2026.
Satellite counts: CelesTrak public catalog groups (synced daily) where a group exists for the constellation, otherwise a dated count from a cited tracking source, otherwise the profile’s own figure labelled undated. Catalog groups count objects in the group, which can include satellites that are no longer working. Authorized totals and profile details come from FCC and ITU public filings and operator announcements. Coverage estimates are approximate.
Megaconstellations against their FCC deadlines
Promise Tracker: Amazon Leo, Starlink, AST SpaceMobile, Telesat
The Rise of Mega-Constellations: Business Impact
Blog article
SpaceX Starlink: Everything You Need to Know (2026)
Blog article
Orbital data centers: who is building compute constellations
Tracker: every space data center program by stage, sourced