Product Support Center


On-Premise APIs

Reference materials on how to use local APIs (static library) and a dynamic library (DLL on Windows, shared library on Unix)

View Reference Guides

Cloud APIs

Reference materials on how to get data in and out of our REST APIs.

View Quickstart Guides


Browse and search through Melissa's detailed product information.

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Melissa Address Key (MAK)

Information on Melissa's persistent, unique 10-digit key assigned to each U.S., Canadian and international address to improve address standardization, updating, matching and enrichment processes.

View Info

Our Data

Address Coding Support

Having trouble coding an address, or receiving unexpected results?

Submit Address

Data Coverage by Country

Matrix showing address, phone, geocoding & identity coverage for Melissa global products.

View Support Countries

Result Codes

Descriptions of the results returned by our products so you know exactly what was done to your data.

View Result Codes

Server Status

Dashboard showing real-time status, response times and outage history.

View Status

Server Locations

Map of current server locations, redundancy, and dynamic response available via AWS.

View Locations


Information on how Melissa cares for your data and maintains compliance with GDPR, SOC 2, HIPAA and other regulations.

View Certifications

Other Resources

Product News and Updates

Get the latest on new features and product advisories.

View Product News & Updates

Address Experts

Read articles on how to achieve the best results using Melissa's best-of-breed address verification and related services.

Read Articles

Developer Portal

Access real-time Web APIs for testing and rapid application development.

Access Portal

Contact Us

Global Offices

Contact Melissa locations for sales, technical support & general information.

View Global Offices

Create Support Ticket

Access our help desk to create a support ticket.

Create Ticket Now

Login to Account

Login and manage your Melissa account.

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Frequently Asked Questions

How does a subscription work?

A monthly subscription of 5,000 lookups is good for either 5,000 lookups or for one month, whichever comes first. A subscription runs for either the number of lookups or for the period of time specified.

How about a one-time subscription?

Easy! After your purchase, select "Off" from the Auto-Renew Plan's dropdown list on the subscription page.

What happens when a subscription runs out?

It renews at the same level as your current plan unless you have specified another plan or have turned the renewal off. Need to change plans? Change it on the subscription page.