Decoding and tracking are different jobs.
An IMb decoder can reveal the values stored in the barcode. That is not the same as obtaining up-to-the-minute USPS mailpiece tracking events.
USPS IMb: 3 successful scans/day free; $4.99 one-time unlimited unlock.
Test it with Barcode Inspector.
Point your iPhone at this barcode on your computer screen and scan it. This example is rendered from an actual 65-bar IMb test specimen, not decorative artwork.
Open full-size scannable barcode ↗ if your iPhone has trouble reading the smaller example. Barcode identifier: 00 · Service type: 271 · Mailer ID: 206551 · Serial: 763979467. Get Barcode Inspector on the App Store ↗
Practical barcode knowledge
What Barcode Inspector does
It decodes the barcode and presents the data for inspection, copying, and sharing.
What it does not promise
A barcode by itself does not provide real-time delivery confirmation. Event visibility depends on separate USPS services and eligible mail-processing data.
Why that matters
A useful inspection tool should be clear about the difference between the encoded identifier and external postal processing history.
Decode IMb right from your iPhone.
Read, inspect, copy, and share USPS Intelligent Mail barcode data using Barcode Inspector.
Get Barcode Inspector on the App Store ↗