I am inquiring the authenticity of this serial number located on the red and white tag; it is called carrier bag CO133938
This Vintage Carrier bag was not made in the USA. If it had been, your red, white and blue tag would also have “Made in USA” on it.
C usually indicates the bag was made in Costa Rica.
It does appear to be an authentic Dooney & Bourke bag, but not made in the USA.