What does TCP/IP mean? TCP/IP stands for Transmission Control Protocol/Internet Protocol, which is a set of networking protocols that allows two or more computers to communicate. The Defense Data Network, part of the Department of Defense, developed TCP/IP, and it has been widely adopted as a networking standard. For more information, you may consult several TCP/IP-related FAQs at the FAQ.org website.
The customer support phone number of Suntrust Ach Department is 800.752.2515 / 800.382.3232 (Click phone number to call).
You can even contact us from outside the U.S. or Canada by using our international calling instructions. Or, use our telephone directory to find numbers dedicated to specific services. TDD. Our hearing-impaired clients can contact SunTrust using a text telephone or TDD at 800.854.8965.