shahabfarooqui
Programmer
I am designing a form for an organization. I have to check the user inputed zip code(US only). Whether it exist or not. I know how to check the validity of a zip code like must be 5 digits and blach blah .. But how can i check whether it exist or not. I dont have table of zip codes since i dont know all the codes of US . I sthere any way i can get the Table with entire zip codes of US to compre with the user input. Samething for the county and city check. What should i do.