Changes to Zip Code + 4 Entry in FlexMLS 

On Wednesday, March 21st, a change to how listing address zip codes will be entered on the Address tab of Add Listing will be installed.

The change will consist of separating the zip code and the 'plus 4' (+4) into two fields.
Currently, the Zip Code + 4 field is required and is entered and populated in one field. 

Current format:
Zip Code: 53226-1234 (10 digit field) required

New format:
Zip Code:  53226 (5 digit field) required
'Plus 4':   1234 (4 digit field) not required 

If the Plus 4 is listed in the tax information, please fill it in.

Why are we doing this?

1. Improve data integrity and searching by zip code 
2. Improved address history matching for a property

Please contact your respective MLS with any questions. You may also follow our updates at
Metro MLS members can call the Help Desk at 414-778-5450 or email