Enhanced Line of Travel (eLOT®)

The eLOT product allows mailers the ability to sort their mailings in approximate carrier-casing sequence.

Who is eLOT for?

First Class Mail

First Class Mail



Standard Mail

Standard Mail

Enrich Your Data


The eLOT product was developed to give mailers the ability to sort their mailings in approximate carrier-casing sequence.

To aid in mail sortation, eLOT contains an eLOT sequence number field and an ascending/descending code. The eLOT sequence number indicates the first occurrence of delivery made to the add-on range within the carrier route, and the ascending/descending code indicates the approximate delivery order within the sequence number. eLOT processing may be used by mailers to qualify for enhanced carrier route presort discounts.

Note: The United States Postal Service® requires address lists to be processed through CASS Certified™ ZIP + 4® addressing-matching software before being processed against eLOT Product. Non ZIP + 4 coded records may not be used with this product.

Featured Resources

Fact Sheets
Enhanced Line of Travel (eLOT) Master Product File Format

This document contains the master product file format for eLOT.

Data Files
Enhanced Line of Travel (eLOT) Sample File

This document provides a sample data file for eLOT.

Applications/ Forms
Electronic Product Fulfillment (EPF) Web Access Request Form

This form is used to create a Web-based account with the National Customer Support Center (NCSC) which will be utilized to retrieve/download files from the Electronic Product Fulfillment (EPF) website.

Applications/ Forms
Address Information System (AIS) Products Order Form

Order form for Address Information System (AIS) products.

Applications/ Forms

Related Products

Address Information System (AIS) Viewer

AIS Viewer is an interactive application designed to provide the ability to retrieve, view, and print accurate and current ZIP Code™ information for all 50 states.

Carrier Route Product

The Carrier Route Product provides reference information needed to apply carrier route codes to addresses for presort postage discounts.

City State Product

The City State Product is a comprehensive list of city, county, and Post Office names associated with each ZIP Code™.

Delivery Statistics Product

The Delivery Statistics Product defines the number of post office boxes and business/residential deliveries on city, rural, and highway contract routes for every ZIP Code™ in the United States.

Five-Digit ZIP® Product

The Five-Digit ZIP® Product provides five-digit ZIP Code™ data that can be appended to computerized mailing lists via address-matching software.

ZIPMove Product

ZIPMove Product offers a means of correcting addresses that have undergone a ZIP Code™ realignment in which a change in city name and finance number occurred.

ZIP + 4® Product

The ZIP + 4® Product is a base reference file that can be accessed by an application to assign the correct ZIP + 4® Code associated with a physical address.

Z4Change Product

Z4Change Product provides mailers the information necessary to create an application that would facilitate frequent and cost-effective processing for updating very large computerized mailing lists for automation compatibility and improved deliverability.


For more information about eLOT, contact the National Customer Support Center at 1-800-238-3150.