Businesses like to send one outgoing CID number from branch offices in several states, serviced by several local carriers, without having to route those calls t

Businesses like to send one outgoing CID number from branch offices in several states, serviced by several local carriers, without having to route those calls through a central location first. Individual telecom companies know who to bill, but "the telecom companies" don't have collective knowledge except by deliberate effort. There's no incentive to expend that effort unless it's "a new feature to add to the bill," and all it takes to make that effort worthless is one carrier who refuses to play along.