I need a zip code querying function for all zip codes in the USA.
I have job seekers and job posters on my site.
My job seekers add zip code as a part of their user profile and agree to travel a certain amount of miles from this zip code for work (example: I am looking for work within 20 miles of 92101).
Those on my site who have the job offerings use the zip code as a tool for finding suitable employees for certain job posts (example: I am looking for candidates with 20 miles of 92101).
I need my members to search jobs within a specified mile radius of the zip code entered and find each other. Also, I need to have those providing the job to search the job service providers by zip. Members can search for others within 10, 25, 50, etc. miles of their zip code to find the most suitable matches.