nbt national bank & trust - a texas tradition since 1888 - la grange, texas. (979) 968-3136 or (800) 330-3136 - the bank with a professional attitude and hometown friendliness! national bank & trust, located at 145 west colorado street in la grange, texas, has been a major factor in the development and expansion of the business and agricultural communities of this area since 1888. national bank & trust is a full service bank with friendly people who take the time to listen and talk with customers about their banking needs.