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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(gong)司(si)（英語：AT&T Inc.，原為American Telephone & Telegraph的縮寫，也是(shi)(shi)中文譯名美(mei)國(guo)電(dian)話電(dian)報公(gong)司(si)由(you)來，但近年(nian)來已不用全名），是(shi)(shi)一家美(mei)國(guo)電(dian)信公(gong)司(si)，創建于1877年(nian)。 AT&T在近120年(nian)中，曾經過多次分拆(chai)和重(zhong)組。 AT&T也是(shi)(shi)是(shi)(shi)美(mei)國(guo)NBA聯盟(meng)圣安東尼奧馬刺(ci)的球館(guan)英語名AT&T Center。

美(mei)(mei)國(guo)電(dian)話(hua)(hua)(hua)電(dian)報公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)有(you)8個(ge)(ge)主(zhu)(zhu)要部門 ：貝(bei)爾實驗(yan)室、商業(ye)市(shi)場集團(tuan)、數據系(xi)(xi)(xi)統公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si) 、通(tong)用(yong)市(shi)場集團(tuan) 、網絡運營集團(tuan)、網絡系(xi)(xi)(xi)統集團(tuan)、技(ji)術系(xi)(xi)(xi)統集團(tuan)、公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)國(guo)際(ji)集團(tuan)。主(zhu)(zhu)要業(ye)務是：為(wei)國(guo)內(nei)國(guo)際(ji)提(ti)供(gong)電(dian)話(hua)(hua)(hua)服(fu)務。利用(yong)海底(di)電(dian)纜(lan)(lan)、海底(di)光纜(lan)(lan)、通(tong)信衛星，可聯系(xi)(xi)(xi)250個(ge)(ge)國(guo)家(jia)和(he)(he)地(di)區，147個(ge)(ge)國(guo)家(jia)和(he)(he)地(di)區可直接撥號。提(ti)供(gong)商業(ye)機器、數據類產品和(he)(he)消費(fei)類產品。提(ti)供(gong)電(dian)信網絡系(xi)(xi)(xi)統。各種服(fu)務及租賃業(ye)務。它還(huan)為(wei)政(zheng)府提(ti)供(gong)產品和(he)(he)服(fu)務。該公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)非常重視科研和(he)(he)開發新產品。美(mei)(mei)國(guo)電(dian)話(hua)(hua)(hua)電(dian)報公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)在(zai)泰(tai)國(guo)、德國(guo)、新加(jia)坡(po)等地(di)設有(you)工(gong)廠。在(zai)意大利、韓國(guo)、日本等國(guo)設有(you)子公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)或者合資公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)。1995年(nian)9月，該公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)解(jie)體為(wei)三個(ge)(ge)獨立的(de)公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)：通(tong)訊服(fu)務公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、通(tong)訊設備公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、電(dian)腦信息(xi)服(fu)務公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)，并且退出個(ge)(ge)人電(dian)腦領域。AT&T的(de)瓦解(jie)過程(cheng)開始于(yu)1984年(nian)。在(zai)美(mei)(mei)國(guo)政(zheng)府反壟(long)斷(duan)政(zheng)策的(de)強制干預下，公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)的(de)本地(di)電(dian)話(hua)(hua)(hua)業(ye)務被分(fen)裂出去(qu)，重新組建了7個(ge)(ge)子公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)，分(fen)別是：貝(bei)爾太平洋(yang)公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、Ameritech公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、貝(bei)爾西南公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、貝(bei)爾西部美(mei)(mei)國(guo)公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、貝(bei)爾大西洋(yang)公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)、貝(bei)爾南方(fang)公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)和(he)(he)Nynex公(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)。