Follow every package across carrier handoffs.
Most "Where Is My Order?" tickets happen when a cross-border consolidator assigns a new local tracking number at customs, or when a domestic 92… parcel sits in "USPS Currently Awaiting Package" while moving through OSM Worldwide or Pitney Bowes. Test any handoff number below or browse the 12 carrier handoff guides.
12 carrier-to-carrier handoff guides
OSM Worldwide → USPS
/handoff/osm-to-usps
Track OSM Worldwide parcels before and after USPS handoff—even when USPS says 'Currently Awaiting Package'.
Arrived at OSM Facility — Glendale Heights, IL (via ?carrier=osm)
Pitney Bowes → USPS
/handoff/pitneybowes-to-usps
Resolve 'USPS Currently Awaiting Package' on Pitney Bowes & eBay International Shipping parcels.
Departed Pitney Bowes Facility — Greenwood, IN (via ?carrier=pitneybowes)
YunExpress → UniUni
/handoff/yunexpress-to-uniuni
Track YunExpress (YT…) parcels and automatically extract the UniUni (UUS…) last-mile tracking number.
Handed to UniUni as UUS5BM1269395824723
YunExpress → USPS
/handoff/yunexpress-to-usps
Convert YunExpress (YT…) waybills to their final-mile USPS (92… / 420…) tracking number automatically.
Handed to USPS as 9261290100130612345678
Yanwen → USPS
/handoff/yanwen-to-usps
Track Yanwen (…YP / YW…) parcels and extract the final-mile USPS tracking number in one API call.
Handed to USPS as 420100019261290100130612345678
Yanwen → UniUni
/handoff/yanwen-to-uniuni
Track Yanwen (…YP / YW…) cross-border parcels handed off to UniUni (UUS…) for North American delivery.
Handed to UniUni as UUS5BM1269395824723
Cainiao → USPS
/handoff/cainiao-to-usps
Convert Cainiao / AliExpress (LP… & AP…) tracking numbers to their US final-mile USPS barcode.
Handed to USPS as 9261290100130612345678
Cainiao → SpeedX
/handoff/cainiao-to-speedx
Track Cainiao (LP… / AP…) parcels handed off to SpeedX (SPX…) for US metro doorstep delivery.
Handed to SpeedX as SPXUS0123456789123
4PX → USPS
/handoff/4px-to-usps
Track 4PX (4PX…CN) cross-border shipments and extract the destination USPS tracking number.
Handed to USPS as 9261290100130612345678
CNE Express → USPS
/handoff/cne-to-usps
Track CNE Express (3A5V…) parcels and extract the destination USPS or local postal barcode.
Handed to USPS as 9261290100130612345678
Asendia → USPS / Postal
/handoff/asendia-to-usps
Track Asendia (AHOY… & AS…US) parcels and extract the destination postal tracking number.
Handed to USPS as LZ123456785US
UBI Smart Parcel → Local Last-Mile
/handoff/ubi-to-auspost
Track UBI Smart Parcel (AU…) shipments and extract the destination last-mile barcode cleanly.
Handed to Australia Post as 33XHG528640101000935104