As a first resource, you can use the U.S. Department of Energy’s Alternative Fuels Data Center, which provides all of the electric vehicle charging centers in the U.S. It is searchable, and you can filter the results depending on location and charger types. There are also numerous apps and platforms that can assist in trip planning, including PlugShare, ChargeFinder, EV Safe Charge, Electrify America and RoadTrippers, to name a few.