These are the fields and lengths handled and allowed by UPS:

 

CarrierField/dataLengthAlphanumeric only
UPSReason for Export1 to 20Yes
UPSShip From Postal Code4 to 6Yes
UPSShip to (sold to) Postal Code0 to 9Yes
UPSShip to (sold to) Phone Nº1 to 15Yes
UPSShip to (sold to) Address1 to 34Yes
UPSCurrency code3Yes
UPSShip to (sold to) Name (company)1 to 35Yes
UPSShip to (sold to) Attention Name1 to 35Yes
UPSShip to (sold to) City1 to 30Yes
UPSAny label reference field1 to 35N/S