: These denote the specific delivery post office . Potential Explanations
: These are consistently 5 digits long. A 6-digit number like 155891 does not fit this format. 155891 zip
: This would represent a specific sorting district within that region. : These denote the specific delivery post office
: You may be looking for a code that was recently changed or contains a typo (e.g., 110091 for Mayur Vihar, Delhi, or 151001 for Bathinda, Punjab). 110091 for Mayur Vihar