USPS 4CB/One Code/Intelligent Mail Overview

USPS Intelligent Mail barcode

An Intelligent Mail Barcode (IM barcode) is also referred to One Code, USPS 4CB and is used on mail in the United States.

How to scan 1D and 2D barcodes (EN)

Supported Host Device


Products that Support USPS 4CB/One Code/Intelligent Mail Overview

(This barcode is disabled by default)

Supported Business Applications:

Partner Applications

Applications integrated with Socket Mobile's CaptureSDK.


Verify with your application provider that Socket Mobile's latest CaptureSDK was implemented in your app. See the latest CaptureSDK version.

See complete list of business applications.

Non-CaptureSDK Applications

Applications that are not integrated with Socket Mobile's CaptureSDK:



USPS 4CB/One Code/Intelligent Mail is supported by default on all Socket Mobile barcode scanners. You can enable or disable this symbology on your Socket Mobile scanner simply by scanning the codes below.  Note: Scanner must be in a disconnected state before scanning the command barcode.

Enable USPS 4CB/One Code/Intelligent Mail by scanning the barcode below*:

Enable USPS Intelligent

Disable USPS 4CB/One Code/Intelligent Mail by scanning the barcode below*:

USPS Intelligent Disable

See the full programming guide for more info and troubleshooting.
* D750 requires separate enable/disable command barcodes found in the programming guide.

Troubleshooting / FAQ

Q: What is the typical usage of USPS 4CB/One Code/Intelligent Mail?

A: United States

Q: Need more help?

A: Go here for additional barcode troubleshooting and FAQs.