In one embodiment, trixNet service comprises a verification process performed by the verification module 208. This verification process prevents people from stealing other people's telephone numbers and unethically diverting all “in-network” trixNet phone traffic to their PBX. In this embodiment, the verification module 208 will trigger a call to the carrier-issued telephone number being registered to verify ownership. The user may then be asked to press a certain key or series of keys (i.e., DTFM sequence) to verify that they want to add the carrier-issued telephone number into the trixNet service. Once a user has validated a telephone number by pressing the correct key(s), the carrier-issued telephone number is considered authorized and a formal part of the trixNet service to be reached, for free, by any other trixNet user dialing that carrier-issued telephone number. It should be noted that a carrier-issued telephone number may be re-verified at any time, which may gracefully handle carriers who use local number portability (LNP) to move telephone numbers to different users or carriers.

The routing instruction module 210 is configured to determine a correct address associated with the carrier-issued telephone number. In exemplary embodiments, the routing instruction module 210 will receive the carrier-issued telephone number entered by the user via their network device 110 and sent via the call management system 112. The routing instruction module 210 then accesses the relational database 206 and uses the carrier-issued telephone number as a lookup key to determine if a corresponding address is mapped to the telephone number. The address may then be sent back to the call management system 112 in order to initiate the call via VoIP.