You can verify current Indian PIN codes through the India Post Official Portal.
The number 155400 is often a typo for one of these valid U.S. postal codes:
If you encountered "155400" in a different context, it might be:
There is no officially recognized ZIP code in the United States or other major global postal systems . ZIP codes in the United States are typically 5 digits (e.g., 55400), though they can be extended to 9 digits (ZIP+4).
: This 5-digit code is located in Somerset County, Pennsylvania . 2. Potential International PIN Codes