Where can I locate my tracking number for USPS?

Where can I locate my tracking number for USPS?
USPS tracking numbers are available in the following locations:
USPS delivery receipt.
Your confirmation email address.
On the actual packaging.

If you are the recipient, you can ask the sender for it.
USPS will send a text message to the phone number you supplied.
Track up to 10 USPS packages on the Ship24 site with your USPS tracking number. Ship24 can scan more than 1,200 shippers throughout the world and offer you with timely and accurate information about your cargo.

How long does it take USPS to deliver a package?
As the number and location of goods often vary, the USPS cannot provide an accurate predicted delivery time. With the exception of Priority Mail Express and Amazon shipments, which are delivered on Sundays, all USPS parcels are considered to have been delivered before 5:00 p.m. local time Monday through Saturday.

Where can I obtain the best USPS global tracking?
The travel of a box is a complex and lengthy logistical exercise, especially when shipping overseas. As a cargo traverses international boundaries, numerous shippers are able to trace it with a variety of codes. As this is our area of expertise, we designed our tracking system to accommodate the vagaries that can arise within the shipping business. We diligently search for and transmit information 24 hours a day, seven days a week.

How can I contact Customer Service for USPS Tracking?
USPS customer care is available to assist you with any inquiries, problems, or feedback. There are multiple methods to reach them.
Customer Service at USPS
Choose one of the options on their website if you wish to contact them via e-mail, and you will be redirected to a page where you can select an area of interest.
USPS telephone number
You can also contact customer service regarding tracking using this number: 1-800-222-1811 (Monday through Friday, 8 a.m. - 8:30 p.m. ET and 8 a.m. - 6 p.m. Saturday) (Monday through Friday, 8 a.m. - 8:30 p.m. ET and 8 a.m. - 6 p.m. Saturday)