For commercial use only. NationalChangeofAddress.com are not affiliated with the USPS®. We DO NOT add or update records on the USPS® Master Database. To update your personal address on the USPS® Master Database or file a Change of Address, please contact the USPS by calling 1-800-ASK-USPS® (1-800-275-8777) or visit www.usps.com for USPS Change of AddressTM.

Delivery Sequence File Second Generation

DSF2®


DSF2® is an address accuracy tool that identifies addresses that are complete and corrects addresses that are not. It determines whether a ZIP+4® coded address is currently represented in the USPS® delivery file as a known address record.

Delivery Point Validation (DPV®) identifies if an address is missing secondary data such as an Apt# or contains incorrect secondary data. All DPV® functionality is included in DSF2®.

If your marketing program will benefit from any of the following, DSF2® is the solution for you.
  • Residential or commercial
  • Seasonal
  • Curbside mailbox, door slot, NDCBU (Neighborhood Delivery and Collection Box Unit), or central delivery
  • Walk-Sequence codes to qualify for USPS Enhanced Carrier Route (ECR), Basic, High Density, or Saturation postal discounts

Contact Us


Our hours of operation are from 8 am to 6 pm EST M-F, except on U.S. holidays.

Our team of direct marketing professionals will be pleased to make sure your project runs smoothly, on schedule and within budget. We issue detailed reports and will show you how to read and interpret all data we process.

Our sales and support staff are ready to answer your questions, provide fast quotes and offer expert advice and suggestions.

Sales, Service & Support

Phone: (800) 383-2445

Email: service@nationalchangeofaddress.com