KuwaitGoogle Maps names headquarters and fuel points at struck bases.
Iranian strikes have damaged at least 20 US sites in 7 countries since February, researchers found.
Labels at Camp Arifjan, Camp Buehring, Muwaffaq Salti and Al Udeid reveal where personnel gather, experts said.
Experts cautioned Iran also had other intelligence, including Russian satellite imagery.
Governments can ask Google to blur sensitive sites, but the Pentagon and Google did not answer questions before publication.
How each outlet framed it
- Bellingcat
- shows public map labels (gyms, fuel points, accommodation) at US Gulf bases as possible targeting aids, citing experts on Iran's other intelligence
Sources: Bellingcat