How to view multiple postcodes on google maps

[smileymikey]

I have a new job in the South West which involves visiting around six residential address's in the South West per day. I would like to be able to input the six postcodes into a system that will then bring up a map of the local area. Highlighting the post codes. I have Sat Nav and a smart phone, its just that a lot of the locations are in the deep boonies and I would like to be able to visualise where they are in relation to each other, in order to come up with a half sensible call plan....Please help