RegEx pattern any two letters followed by six numbers

Question

Please assist with the proper RegEx matching. Any 2 letters followed by any combination of 6 whole numbers.

These would be valid: 
RJ123456
PY654321
DD3212         


        

Answer 1

Depending on if your regex flavor supports it, I might use:

\b[A-Z]{2}\d{6}\b    # Ensure there are "word boundaries" on either side, or

(?