FirstBank Puerto Rico, Mayaguez Branch Basic Info Reviews Routing Numbers Map & Direction Name: FirstBank Puerto Rico, Mayaguez Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2 Calle Ii Mayaguez, Puerto Rico 00680 Mayaguez County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer021502354YN221571473YY221672851YN From: To: