Data Appending Services

There's a popular saying that 20% of customers generate 80% of sales

ListGIANT's industry-leading data appending services precision target your ideal prospects.

Your marketing focus is on driving sales, not compiling, engineering and architecting your prospects database. Delegate this duty and let add that spice back into your marketing programs. With match-keys developed by leading participants in our industry, you can rest assured that once you’ve employed our services, your business will be utilizing the most robust and reliable databases available! provides a wide variety of marketing lists appending services including demographic, psychographic and contact information segmentations.

mailing lists data appending services





What you get


Landline Phone Appending Services

165MM Records Available

Our phone database is compiled from multiple sources including credit bureau data, public record information and title company data. This information is ideal to marry to your mailing and prospecting lists. The ListGIANT database is also a great resource for 'reverse appending' information to your sales leads.

Cellular Phone Appending Services

29MM Records Available

Our wireless phone database is continually maintained and updated through multiple response channels. This database may be accessed to strengthen the breadth of contact information contained within your current customer lists.

Email Appending Services

220MM Records Available

We have developed an email database that consists of permission-based, opt-in consumers derived from one of the largest online advertising networks. The scope of this dataset includes over 220 million addressable email addresses. We’ve integrated this database with our real-time data feeds to tap into the absolutely freshest information on the web, making your online campaigns more successful than ever.

Demographic Appending Services

Use this comprehensive database to learn more about your current customer base. We’ve aggregated one of the largest and deepest masterfiles in the industry by compiling complete public record, credit bureau and title files.

Psychographic Appending Services

Living data’s premier response information allows you to identify specific behavioral traits at either an individual or household level. Use this service if you’d like to identify key 'buying' signals and lifestyle triggers from your customer or prospects lists.


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