If a Dallas bank is a member of a chain, as with Texas Capital Bank and Bank of America, then you can locate the Dallas branch by visiting the bank locator on these websites. Click on the Locations tab on both websites and enter Dallas into the search engines.
The Bank of America provides a list of member banks within Dallas, as well as a Google Maps image showing bank locations by means of icons. Clicking on one of these icons shows that bank's name, address and contact information. Texas Capital Bank has a list of Dallas member banks with their addresses.