You can use this handy tool (http://www.localcallingguide.com/lca_prefix.php) to determine local calling areas for your telephone number!
Simply enter your NPA (Area code) and NXX (first three numbers of your phone number) and click submit!
Doing so will provide you with information on your rate center as well as a table containing all of the exchanges which are local calls for you.
Searching for 519-401 returns the following result:
Which tells us that 519-401 numbers can make local calls to all of the above listed towns.