Now Open to New Castle County! If you live, work, worship, or attend school in New Castle County, you are now eligible to join DEXSTA FCU. Click on How to Join . Community Day - Saturday, June 29th. Stop by the Credit Union for free food, prizes and give-aways. Enterprise Car Sale - Saturday, June 8th at Frawley Stadium from 9:00 to 2:00. Rates as low as 4.74% with Key User discount. C.U. Links ...