Data Lists & Mailing Lists

Reach the right audience with targeted, accurate, and USPS-compliant mailing lists.

The Foundation of Every Great Campaign

Your mailing list is the single most important factor in your direct mail campaign's success. A perfectly designed mail piece sent to the wrong audience is wasted money. Cornerstone Services provides high-quality, targeted mailing lists that put your message in front of the people most likely to respond.

Whether you need a saturation list covering every household on a carrier route, a targeted consumer list filtered by demographics, or a business-to-business database, we source and process the data you need. Every list is run through NCOA (National Change of Address) and CASS (Coding Accuracy Support System) processing to ensure deliverability and qualify for USPS automation postage rates.

List Types We Provide

Saturation Lists

Every deliverable address on selected carrier routes — ideal for EDDM and local campaigns

Consumer Lists

Filtered by age, income, homeownership, interests, purchase behavior, and more

Business Lists

Targeted by SIC/NAICS code, employee count, revenue, and geography

New Mover Lists

Recently relocated households — high-value prospects actively looking for local services

Voter Files

Registered voter data for political mailings and municipal notifications

Custom Compiled Lists

Specialty lists built to your exact specifications from multiple data sources

Data Processing & Hygiene

Raw data is only as good as its processing. We clean, verify, and prepare every list to maximize deliverability and minimize waste:

NCOA Processing

We run every list through the USPS National Change of Address database to update addresses for anyone who has moved in the last 48 months. This is required by the USPS for presorted mailings.

CASS Certification

Coding Accuracy Support System verification standardizes and validates every address against the USPS database. This ensures deliverability and qualifies your mailing for automation postage discounts.

Deduplication

We identify and remove duplicate records so you are not paying to mail the same person twice. We can also merge/purge against your existing customer list to avoid mailing current clients.

Presort Optimization

Once cleaned, your list is presorted by ZIP code to qualify for the lowest available postage rate — often saving 30–50% compared to First-Class single-piece rates.

Need a Targeted Mailing List?

Tell us your audience and geography — we'll provide a count and quote.

Get a Free Estimate Call (845) 255-5722

Already Have a List?

If you already have a customer or prospect list, we can process it for direct mail. We accept data in Excel, CSV, or database formats. We'll clean, verify, NCOA-process, and presort your list so it's ready for mailing. We also offer merge/purge services to combine multiple lists while removing duplicates.