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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(ying)(ying)語：AT&T Inc.，原為(wei)American Telephone & Telegraph的縮寫(xie)，也(ye)(ye)是(shi)中(zhong)文譯名美(mei)國(guo)(guo)電話電報公司(si)由(you)來，但(dan)近(jin)年(nian)(nian)來已不用全名），是(shi)一(yi)家美(mei)國(guo)(guo)電信公司(si)，創建(jian)于1877年(nian)(nian)。 AT&T在近(jin)120年(nian)(nian)中(zhong)，曾(ceng)經(jing)過多(duo)次分拆和(he)重組。 AT&T也(ye)(ye)是(shi)是(shi)美(mei)國(guo)(guo)NBA聯(lian)盟圣(sheng)安東(dong)尼奧馬刺的球館英(ying)(ying)語名AT&T Center。

美國電(dian)(dian)話(hua)電(dian)(dian)報公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)有(you)(you)8個(ge)主要部門 ：貝爾實驗室、商業(ye)市場(chang)集團(tuan)(tuan)、數(shu)據系(xi)統公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si) 、通用(yong)市場(chang)集團(tuan)(tuan) 、網(wang)絡運營集團(tuan)(tuan)、網(wang)絡系(xi)統集團(tuan)(tuan)、技術系(xi)統集團(tuan)(tuan)、公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)國際(ji)集團(tuan)(tuan)。主要業(ye)務是(shi)：為(wei)(wei)國內國際(ji)提(ti)供電(dian)(dian)話(hua)服(fu)務。利用(yong)海底(di)電(dian)(dian)纜、海底(di)光纜、通信衛星，可(ke)聯系(xi)250個(ge)國家(jia)(jia)和(he)(he)地區，147個(ge)國家(jia)(jia)和(he)(he)地區可(ke)直(zhi)接(jie)撥號(hao)。提(ti)供商業(ye)機器(qi)、數(shu)據類產品(pin)和(he)(he)消費類產品(pin)。提(ti)供電(dian)(dian)信網(wang)絡系(xi)統。各種服(fu)務及租賃(lin)業(ye)務。它還為(wei)(wei)政(zheng)(zheng)府(fu)提(ti)供產品(pin)和(he)(he)服(fu)務。該公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)非(fei)常重視科研和(he)(he)開(kai)發新(xin)產品(pin)。美國電(dian)(dian)話(hua)電(dian)(dian)報公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)在泰(tai)國、德國、新(xin)加坡(po)等(deng)地設(she)有(you)(you)工廠。在意大利、韓國、日本等(deng)國設(she)有(you)(you)子公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)或者合資公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)。1995年(nian)9月，該公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)解體(ti)為(wei)(wei)三(san)個(ge)獨立的(de)(de)公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)：通訊(xun)服(fu)務公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、通訊(xun)設(she)備公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、電(dian)(dian)腦信息服(fu)務公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)，并(bing)且(qie)退(tui)出(chu)個(ge)人電(dian)(dian)腦領(ling)域。AT&T的(de)(de)瓦解過(guo)程(cheng)開(kai)始于1984年(nian)。在美國政(zheng)(zheng)府(fu)反壟斷政(zheng)(zheng)策(ce)的(de)(de)強(qiang)制干預(yu)下，公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)的(de)(de)本地電(dian)(dian)話(hua)業(ye)務被分(fen)裂(lie)出(chu)去，重新(xin)組建(jian)了7個(ge)子公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)，分(fen)別是(shi)：貝爾太平(ping)洋公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、Ameritech公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、貝爾西南公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、貝爾西部美國公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、貝爾大西洋公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)、貝爾南方公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)和(he)(he)Nynex公(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)(si)。