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A UPS tracking number, usually start with "1Z" followed by a 6 character shipper number (numbers and letters), a 2 digit service level indicator, and finally 8 digits identifying the package, for a total of18 characters.
"1Z" tracking numbers are of the form 1Z xxx xxx yy zzzz zzz c, where xxx xxx is the alphanumeric account number of the shipper, yy is the service code, zzzz zzz is the package identifier, and c is a checksum of some sort.
A non-exhaustive list of service codes:
01 UPS United States Next Day Air ("Red")
02 UPS United States Second Day Air ("Blue")
03 UPS United States Ground
12 UPS United States Third Day Select
13 UPS United States Next Day Air Saver ("Red Saver")
15 UPS United States Next Day Air Early A.M.
22 UPS United States Ground - Returns Plus - Three Pickup Attempts
32 UPS United States Next Day Air Early A.M. - COD
33 UPS United States Next Day Air Early A.M. - Saturday Delivery, COD
41 UPS United States Next Day Air Early A.M. - Saturday Delivery
42 UPS United States Ground - Signature Required
44 UPS United States Next Day Air - Saturday Delivery
66 UPS United States Worldwide Express
72 UPS United States Ground - Collect on Delivery
78 UPS United States Ground - Returns Plus - One Pickup Attempt
90 UPS United States Ground - Returns - UPS Prints and Mails Label
A0 UPS United States Next Day Air Early A.M. - Adult Signature Required
A1 UPS United States Next Day Air Early A.M. - Saturday Delivery, Adult Signature Required
A2 UPS United States Next Day Air - Adult Signature Required
A8 UPS United States Ground - Adult Signature Required
A9 UPS United States Next Day Air Early A.M. - Adult Signature Required, COD
AA UPS United States Next Day Air Early A.M. - Saturday Delivery, Adult Signature Required, COD
UPS tracking number format
1Z xxx xxx yy zzzz zzz c
10 digits
12 digits
9 digits
H + 10 digits
V + 10 digits
18 digits
UPS tracking number example
234918751
1Z662F416878787827
1Z001985YW96579840
1Z001985YW99744790
1Z001985YW90838348
1Z001985YW92164287
1ZE8889W0442766202
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