目前400電話號碼有三個，分別是中國電信推出的4008xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx目前，企業(yè)辦理中國電信400電話業(yè)務主要有兩種方式：運營商和代理商。

前者是指用戶通過電信營業(yè)廳辦理400項業(yè)務。

然而，在實際業(yè)務運營中，電信作為運營商，更注重傳統(tǒng)的電話和寬帶業(yè)務，向當?shù)氐谌酱砩谭峙淞?0%以上的400電話業(yè)務。

在合作中，電信作為運營商，主要負責提供數(shù)字資源和相關業(yè)務資質(zhì)，而下級代理商負責開發(fā)400平臺功能和維護通信線路。