1. A method of initiating a call, the method comprising: receiving, at a network device over a first network, an identifier associated with a called party, the identifier being generated by a telephone handset; determining, by the network device, a first security level associated with the first network; identifying, by the network device, a plurality of networks associated with the called party using the identifier, wherein identifying, by the network device, the plurality of networks associated with the called party comprises querying a database to determine a second security level for each network in the plurality of networks; automatically selecting, by the network device, an identified network from the plurality of networks associated with the called party having the second security level at least equal to the first security level; and completing a call to the called party using the identified network.