PRODUCT UPDATE NOTICE

QUARTERLY DATAFILE UPDATE INFORMATION

PRODUCT: ZIP SOURCE (GEOGRAPHIC DATA FILE (GDF))

RELEASE: March 31, 2007

PREVIOUS UPDATE: December 31, 2006

COMMENTS: ZIP SOURCE is provided as a fixed block sequential file. The external tape label will provide specific DCB information. Please utilize

in-house utilities for installation.

UPDATE SUMMARY: The following are estimates of the changes that occurred for this release.

DISCONTINUED ZIPS: 2

NEW ZIPS: 6

ZIP CHANGES: 232

Area Code Changes – This release includes the new overlay for Area Codes 815 / 779. Area Code 779 is now in the area_code2 field. First added in December, 2006 release.

Next known anticipated changes are for New Mexico 505 - 575 split effective October, 2007 and expansion of the concentrated NPA 971 overlay with NPA 503 in Oregon. This also is not effective until October, 2007. Both will be added to the September 2007, releaseof ZIPSOURCE.

MSA Changes from OMB Bulletin 07-01

New MSA: 1

New CMSAs and Components: 3

New Components to existing MSAs: 3

Deleted CSA: 1

Changes to Principle Cities: 9

Deleted Principle Cities: 2

Any change in contact names or addresses for billing or shipment should be forwarded to our Shipping Department at the address shown below.

If you have any questions concerning this product, or this technical bulletin, please call our Product Support Representatives at (708) 220-0158 or email cweinberger@sourcesoft.com

Thank you for using SOURCE SOFTWARE products.

SOURCE SOFTWARE, Inc.

15774 LaGrange Road

#200

Orland Park, IL 60462