The precision standard for automated mail sorting. Engineered for USPS compliance and high-speed scan success.
Postnet uses vertical height instead of width to ensure 99.9% reliability on high-speed postal sorting belts.
High-volume mailing requires zero errors in routing. QRTRAC's engine handles millions of ZIP+4 sequences with absolute precision.
A dedicated API for generating USPS-compliant Postnet and IMb barcodes at massive scale.
Every response is pre-calculated for USPS optical compliance and sorting success.
Built on a distributed engine that handles peaks of 10,000 requests per second.
Simple REST endpoints designed for integration with legacy fulfillment software.
// POSTNET Fulfillment API Request
const barcode = await qrtrac.postal.create({
type: 'postnet',
value: '90210-4401',
format: 'png',
dpi: 1200 // Maximum optical clarity
});Postal sorting machines operate at extreme speeds. Even slight bar height distortion can trigger a sorting error.
Verifies the precise ratio between full and half bars.
Compensation for ink spread on porous paper stock.
Ensure high-contrast black ink for maximum optical read.
Join thousands using QRTRAC for automated mail compliance.