Primary Sources & Verification
Every guide and calculator on USA Starter is verified against primary U.S. transit, national park, tax, and government sources including the National Park Service (NPS.gov), Recreation.gov, U.S. Customs & Border Protection (esta.cbp.dhs.gov), Amtrak, state revenue departments, and the USGS/GeoNames municipality registry.
Independence & Advertising Disclosure
USA Starter is an independent travel publication. We are not affiliated with any government agency or transit operator. Display advertising supports free public access to our 15 USD ($) calculators and 50-state directory.