800 number

劍橋詞典

in the US, a free phone number that begins with 800, provided by companies or other organizations offering advice or information
（美國的）800號碼（公司企業(yè)或其他提供咨詢或信息服務(wù)的機構(gòu)開通的以800開頭的免費電話號碼） 返回 800 number