USPS tracking number format

we set # as a letter

• ## + 9 digits + US
  

• M + 9 digits
  

• M + 10 digits
  

• 10 digits

• 20 digits

• 22 digits

• 26 digits

• 28 digits

• 30 digits

• 34 digits

USPS tracking number example

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

Examples

LX542261779US
CG121737258US
CH039483967US
EH005765875US
LX590955753US
EH005962853US
CH039852503US
LM989031213US
70172400000035193417
9400111699000317735411
9200190105190925844414
42033009920019001260019524723

Ps: You can also track your USPS tracking number in trackingmore.com