www.jcsm.com. Home of JCS Zip Code / Area Code Lookups. (Scroll down to functions not visible)

Help on Functions

Functions are named for "known information". The site has information about Zip Codes (both 5 digit and 3 digit), cities, states, counties, and area codes. If you know a zip code, and want city information, choose zip functions, not city functions.

The "buttons" under "Function" correspond to the function's description. "Press" them using the mouse to select the function.
Function
Description
5 Digit
Zip
Functions
Functions are available to filter, resequence, and return information, and to do proximity calculations (distances between zips).
3 Digit
Zip
Functions
Up to 100 5 digit zip codes can be contained within a 3 digit zip code. For example, Minneapolis, MN can point at up to 100 detailed 5 digit zips (55400, 55401, 55402, ...). The three digit zip code "554" points at the geographic center of all these zips.

Functions are available to filter, resequence, and return information, and to do proximity calculations (distances between zips).

City
Functions
Based around city names, functions are available to return other information about the selected city(ies).
County
Functions
Functions are available to group data by county, and to return area, population, and population density statistics
Area
Code
Functions
These functions list Area Code changes by year, and includes any split, combination, overlay, or jeopardy information for related area codes. Functions are also available to return other information from records with the selected area code.

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This page has been accessed 42471 times from 8/11/1999.