ilib/locale/und/US/numplan.json

iLib is a cross-engine library of internationalization (i18n) classes written in pure JS

{"region":"US","countryCode":"1","iddCode":"011","trunkCode":"1","skipTrunk":true,"dialingPlan":"closed","commonFormatChars":" ()-.","fieldLengths":{"areaCode":3,"vsc":0,"cic":7,"mobilePrefix":0,"serviceCode":0,"minLocalLength":7,"maxLocalLength":7,"emergency":0,"special":0,"cic2":4}}