Things you should know before you choose UPS

United Parcel Service(UPS) is the world's largest package delivery company, it is founded in 1907. Every day UPS delivers more than 15 million packages to more than 6.1 million customers in more than 220 countries and territories around the world.

1.UPS general information
UPS global official website: www.ups.com 
UPS American official website: www.ups.com/content/us/en 
UPS tracking website : 
(1) track ups (this is supported by trackingmore.com, you can track 40 ups packages at one time)
(2) ups official website

2.UPS contact information(United States)
Tel:1800-742-5877,TTY/TTD Access for Hearing Impaired 1-800-833-0056
You can also send an online email to UPS by this link: https://www.ups.com/upsemail/input?loc=en_US 

3.UPS number rules
( # Letter, * Digit, ! Letter Or Digit )                                                                  
(1Z !!! !!! !!! *** *** *)  (*** *** *** ***) 
(*** *** *** *)               (*** *** ***)          
Make sure your tracking number is correct, you can't track your package if you missed a single letter or digit.

4.UPS tracking status
Unsuccessful delivery attempt. Notice left
It means the delivery guy left a InfoNotice because he missed you when trying to deliver your package. 
They’ll try to deliver your package on the next weekday (Monday through Friday), excluding holidays. If you won’t be available, you have a few options. To view these options, simply:
1.Track your package using your UPS InfoNotice number, found under the barcode
2.On the Tracking Summary screen, select Change Delivery
3.Select Choose Another Delivery Option
They’ll make up to three attempts to pick up your package.