Looking for US postal codes

A database of US postal codes with miles

[TechMan]

Hello

I want to give feature to my users to search something in a specific postal code with in specific miles. Say for e.g. search cars in 98760 with in 30 miles radius.
From where can I get this database?

Thanks

[TechMan]

:¦

[LifeinAsia]

When you Googled "zip code database" didn't you find what you needed?

[stajer]

This is a 2 part problem:

1. google "zipcode database" and you will find plenty of commercial available db's for under $50.

2. the distance is a separate issue. You need to find a db with the longitude and latitude for each zipcode. Then, google for "longitude latitude distance formula" = you can use that formula to calculate the distance between any two zipcodes or to get a list of all zipcodes within x miles of a zipcode.

[TechMan]

No it mostly showed zip codes database of which is available for sale.

But I have found one containing both longitude and latitude which is used in calculating distance.

[BillyS]

>>But I have found one containing both longitude and latitude which is used in calculating distance.

That's the way I 've done this in the past.

[edited by: BillyS at 12:32 am (utc) on Mar. 16, 2007]