What does my tracking number look like?

USPS Tracking® 9400 1000 0000 0000 0000 00
Priority Mail® 9205 5000 0000 0000 0000 00
Certified Mail® 9407 3000 0000 0000 0000 00
Collect On Delivery Hold For Pickup 9303 3000 0000 0000 0000 00
Global Express Guaranteed® 82 000 000 00
Priority Mail Express International® EC 000 000 000 US
Priority Mail Express® 9270 1000 0000 0000 0000 00, EA 000 000 000 US
Priority Mail International® CP 000 000 000 US
Registered Mail™ 9208 8000 0000 0000 0000 00
Signature Confirmation™ 9202 1000 0000 0000 0000 00