The area code 151 is not a valid area code in North America. Area codes in North America typically begin with a 1 in the first digit, followed by two more digits, and 151 does not correspond to an active area code.
It’s possible that the area code you meant could be part of a larger number. For example, 151 might be the beginning of a specific area code in a region, but it doesn’t exist on its own as a stand-alone area code.
If you’re looking for a specific location, you might want to double-check the full area code (e.g., 315 for parts of New York, or 510 for areas in California).