Northwest Bank, Carnegie Basic Info Reviews Routing Numbers Map & Direction Name: Northwest Bank, Carnegie Main Office: No Service: Full Service Brick and Mortar Office Location: 242 East Main Street Carnegie, Pennsylvania 15106 Allegheny County View other branches Phone: 412-276-2424 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer041201114YN041202702YN243374218YY From: To: