⚠
Starting May 1, 2026, automatic monthly credits top-offs will require account verification.
If you’ve already completed verification, your monthly top-off will continue without interruption.
Verify your account to keep your credits automatically topped off each month.
FormDisabled
Enter 10-digit MAK Code
Get complete address information for every MAK and BaseMAK number.
- MAK (Melissa Address Key) is a persistent 10 digit number assigned to every address in the U.S., Canada & other countries.
- BaseMAK is a persistent unique 10 digit number assigned to properties with secondary addresses (i.e. APT, STE, LOT, etc.).
- Master Address Table (MAT) contains a list of every address in the U.S., Canada & many other countries. Learn more
Recommended Products Related to this Lookup
