again... its not tracking, its delivery confirmation. You can only get an actual tracking number called "Track & Confirm" with their Express Mail (overnight) service. All other types of shipping through USPS is delivery confirmation, certified mail and registered mail; none of which have a live point-to-point tracking details.UPSP tracking information
What does Track & Confirm show?
Enter your label number to see the status of your item. If you shipped with Express Mail®, you’ll get point-by-point tracking details. If you used another service—Delivery Confirmation™, Certified Mail™, Registered Mail™ —you’ll see when it went out for delivery.
Which services and label number formats are compatible?
Enter label numbers, spaces optional, for items using these services:
SERVICE SAMPLE NUMBER
Certified Mail™: 7000 0000 0000 0000 0000
Delivery Confirmation™: 0300 0000 0000 0000 0000
Signature Confirmation™: 2300 0000 0000 0000 0000
Express Mail®: EA 000 000 000 US
Express Mail International®: EC 000 000 000 US
Priority Mail International™: CP 000 000 000 US
Registered Mail™: RA 000 000 000 US
Global Express Guaranteed®: 82 000 000 00
And yes, USPS delivery confirmation sucks as a tracking number. Their system won't update very often and sometimes won't update until after the item has already arrived. Sometimes I get lucky and their website will show that item was shipped at a certain location 24 hours after. But you get what you pay for and they tend to be cheaper to ship non-vital stuff across country, than UPS or Fedex. Personally, I prefer Fedex, but both suck in their own way.