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創于1877年，世界500強，曾長期壟斷美國長途和本地電話市場，2018年完成收購時代華納，旗下擁有HBO、Turner廣播、CNN、華納兄弟影視公司等多個全球知名媒體品牌

AT&T公司(si)（英語：AT&T Inc.，原為American Telephone & Telegraph的縮寫，也(ye)是中(zhong)文譯名(ming)美(mei)國(guo)電(dian)話(hua)電(dian)報公司(si)由(you)來(lai)，但近年來(lai)已(yi)不用(yong)全名(ming)），是一(yi)家(jia)美(mei)國(guo)電(dian)信公司(si)，創建(jian)于1877年。 AT&T在近120年中(zhong)，曾經過多(duo)次分拆和重組。 AT&T也(ye)是是美(mei)國(guo)NBA聯盟圣安(an)東尼(ni)奧(ao)馬刺的球館英語名(ming)AT&T Center。

美國(guo)電(dian)(dian)話電(dian)(dian)報(bao)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)有(you)(you)8個主要(yao)部門 ：貝(bei)(bei)爾實驗室、商業市(shi)(shi)場(chang)集(ji)(ji)團(tuan)、數據系(xi)統(tong)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si) 、通用(yong)市(shi)(shi)場(chang)集(ji)(ji)團(tuan) 、網絡(luo)運營集(ji)(ji)團(tuan)、網絡(luo)系(xi)統(tong)集(ji)(ji)團(tuan)、技術系(xi)統(tong)集(ji)(ji)團(tuan)、公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)國(guo)際(ji)集(ji)(ji)團(tuan)。主要(yao)業務(wu)(wu)是(shi)：為(wei)(wei)國(guo)內國(guo)際(ji)提供(gong)(gong)電(dian)(dian)話服務(wu)(wu)。利用(yong)海底電(dian)(dian)纜、海底光纜、通信衛星，可聯系(xi)250個國(guo)家和(he)(he)地區，147個國(guo)家和(he)(he)地區可直接撥號。提供(gong)(gong)商業機器、數據類(lei)產品和(he)(he)消費類(lei)產品。提供(gong)(gong)電(dian)(dian)信網絡(luo)系(xi)統(tong)。各種服務(wu)(wu)及租賃業務(wu)(wu)。它還為(wei)(wei)政(zheng)府提供(gong)(gong)產品和(he)(he)服務(wu)(wu)。該(gai)(gai)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)非常(chang)重(zhong)視科研和(he)(he)開(kai)(kai)發新(xin)產品。美國(guo)電(dian)(dian)話電(dian)(dian)報(bao)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)在(zai)泰國(guo)、德(de)國(guo)、新(xin)加坡等地設有(you)(you)工廠。在(zai)意大利、韓國(guo)、日本等國(guo)設有(you)(you)子公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)或者合資公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)。1995年(nian)9月，該(gai)(gai)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)解體(ti)為(wei)(wei)三個獨立的公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)：通訊服務(wu)(wu)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、通訊設備公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、電(dian)(dian)腦(nao)信息服務(wu)(wu)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)，并且退出個人電(dian)(dian)腦(nao)領域。AT&T的瓦解過程開(kai)(kai)始于1984年(nian)。在(zai)美國(guo)政(zheng)府反壟斷政(zheng)策的強制干(gan)預(yu)下，公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)的本地電(dian)(dian)話業務(wu)(wu)被(bei)分(fen)裂出去，重(zhong)新(xin)組建(jian)了7個子公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)，分(fen)別是(shi)：貝(bei)(bei)爾太平(ping)洋(yang)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、Ameritech公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、貝(bei)(bei)爾西(xi)南公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、貝(bei)(bei)爾西(xi)部美國(guo)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、貝(bei)(bei)爾大西(xi)洋(yang)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)、貝(bei)(bei)爾南方(fang)公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)和(he)(he)Nynex公(gong)(gong)(gong)(gong)(gong)(gong)(gong)司(si)。