The Bryn Mawr Trust Company, Exton Branch Basic Info Reviews Routing Numbers Map & Direction Name: The Bryn Mawr Trust Company, Exton Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 237 N. Pottstown Pike Exton, Pennsylvania 19341 Chester County View other branches Phone: 484-875-9050 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer031101059YN031908485YY031976200YN231371964YN From: To: