CBP One™ Mobile Application | U.S. Customs and Border Protection
https://www.cbp.gov/about/mobile-apps-directory/cbpone
WebOct 28, 2020 · The app is free to download, and users can register 24 hours a day, 7 days a week. To ensure efficiency and enhance security, beginning on Monday, March 4, 2024, noncitizens in Central and Northern Mexico can request CBP One™ appointments between the hours of 12 p.m. and 11:59 p.m. ET each day.
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