International Bank of Commerce, Round Rock - Randalls Instore Basic Info Reviews Routing Numbers Map & Direction Name: International Bank of Commerce, Round Rock - Randalls Instore Main Office: No Service: Full Service Retail Office Location: 1850 Gattis School Rd. Round Rock, Texas 78664 Williamson County View other branches Phone: 512-320-9530 Please enable JavaScript to view the comments powered by Disqus. From: To: