Apparatus, and an associated method, for facilitating routing of data in a
packet radio communication system. A clone list is downloaded to the
mobile node and stored at a clone list depository thereat. The clone list
includes a plurality of entries, each of which provides routing
information needed to route data when the mobile node is positioned
within coverage areas encompassed by differing networks. A determination
is made whether the clone list includes appropriate routing information
to route a data packet sent by the mobile node positioned in a particular
area encompassed by a particular network portion. If the clone list
includes an entry containing such information, the need separately to
request such information is obviated.