Determining DID

For inbound calls, can Asterisk determine the number that was dialed by the caller? We have a large group of DID numbers that are routed over an ISDN PRI and we need to be able to determine the number that was dialed to properly route the call.

yes

voip-info.org/wiki/view/Asterisk+tips+did

Thanks Rusty. I am still learning my way around here.