First Commercial Bank, First Commercial Bank, National Association Basic Info Reviews Routing Numbers Map & Direction Name: First Commercial Bank, First Commercial Bank, National Association Main Office: Yes Service: Full Service Brick and Mortar Office Location: 1336 East Court Street Seguin, Texas 78155 Guadalupe County View other branches Phone: 830-379-8390 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer114016524YN114912220YY114921981YY From: To: