Tracking numbers starting with 1Z: it's UPS
1Z then 16 letters and digits. A UPS number. UPS is one of the faster last miles for US parcels in our data, about 8 days from its first scan, and it delivers Saturdays in most areas.
How long these take
Measured on 1,578 delivered parcels to the USA tracked on RepTools: most arrive in 9 to 15 days from the first carrier scan, typically 12, and nine in ten within 19. Full breakdown on the the USA shipping-time page.
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The number never appears in a link or page address.
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Questions people ask
What carrier is a tracking number starting with 1Z?
UPS. A UPS number. UPS is one of the faster last miles for US parcels in our data, about 8 days from its first scan, and it delivers Saturdays in most areas.
Where do I track it?
UPS's site once scanned; the RepTools tracker shows the China leg as well.
Is UPS worth paying for on a rep parcel?
On speed it is among the best: about 8 days from the first scan in our US data, second only to FedEx, and it delivers on Saturdays in most areas (7 of 83 deliveries we logged). It is also one of the dearer lines at checkout.
Why does my tracking number show nothing?
Because the number was created before the parcel left China. Local carriers like Canada Post, USPS and Royal Mail only scan once the parcel lands in your country, usually 4 to 10 days after your agent ships. The RepTools tracker fills that gap with the agent's own China-side scans.
Counts are tracking numbers looked up on rep.tools in the last 45 days, grouped by format, updated 2026-09-05. Carrier attribution comes from the format itself plus the carrier that scanned the parcel. Delivery times are measured from the first carrier scan to the delivery scan.