State => Cities = > MuniciplArea => CallCenter => CallCenterCode => **LandLine**

select from landline where stateId =1

landline (table)
            MunicipalAreaId  , CallCenterId , StateId,CityId, CallCenterCodeId

landline (table)
            MunicipalCode  , CallCenterCode , StateCode ,CityCode , CallCenterCode