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(wù)主要有兩種方式：運(yùn)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(wù)。

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

在合作中，電信作為運(yùn)營商，主要負(fù)責(zé)提供數(shù)字資源和相關(guān)業(yè)務(wù)資質(zhì)，而下級代理商負(fù)責(zé)開發(fā)400平臺功能和維護(hù)通信線路。