Now you can locate any Mobile Number or any STD Code within India from your mobile phone itself without any GPRS Connection. Below are the different versions of "Mobile Number Locator" (according to supported JAVA version in your mobile). Download a version for your mobile and start fetching mobile numbers from your mobile itself.

All Java Supported Handset (CLDC 1.0 , MIDP 2.0)
Version 4.1
Download .JAR

Windows Mobile (Smartphone, Pocket PC, Touch Screen).
Version 3.1
Download .CAB