400開頭的(de)(de)電(dian)話,總共(gong)分(fen)為(wei)以下幾種(zhong):4006電(dian)話,是中(zhong)國(guo)(guo)聯通(原中(zhong)國(guo)(guo)網通)運營的(de)(de)400電(dian)話,從(cong)400-999-5555到(dao)400-999-5555,總共(gong)100萬個號碼(ma)(ma)。4000電(dian)話,是中(zhong)國(guo)(guo)聯通(原老聯通)申請,近期即將啟動的(de)(de)400電(dian)話,從(cong)4000 000 000到(dao)4000 999 999總共(gong)100萬個號碼(ma)(ma)。

聯通(tong)(tong)400電話(hua)(hua)是(shi)是(shi)中(zhong)國(guo)工業(ye)(ye)(ye)信息化(hua)部(bu)授權中(zhong)國(guo)聯通(tong)(tong)固話(hua)(hua)運營商在全(quan)國(guo)推出的免長途(tu)費(fei)用(yong)的電話(hua)(hua)服務(wu)。該業(ye)(ye)(ye)務(wu)的通(tong)(tong)話(hua)(hua)費(fei)由(you)主(zhu)、被(bei)叫(jiao)(jiao)分攤付(fu)費(fei)又稱主(zhu)被(bei)叫(jiao)(jiao)分攤付(fu)費(fei)業(ye)(ye)(ye)務(wu)。 用(yong)戶只要支付(fu)當地(di)市(shi)話(hua)(hua)費(fei)用(yong)，被(bei)叫(jiao)(jiao)(企業(ye)(ye)(ye)用(yong)戶)只要支付(fu)長途(tu)費(fei)用(yong)，即可實現(xian)自由(you)通(tong)(tong)話(hua)(hua)。聯通(tong)(tong)400電話(hua)(hua)分為(wei)4000和4006號段(duan)，是(shi)目前(qian)400電話(hua)(hua)業(ye)(ye)(ye)務(wu)發展最好的。