Contact Us Phone: 800.652.2328 Email: memberrelations@atomiccu.com Please submit all mail to: Atomic Credit Union 711 Beaver Creek Road Piketon, OH 45661 First Name * Last Name * Email Address * Phone Are you an Atomic Credit Union Member? Atomic Credit Union Member * YesNo Comments * Call CenterHave a question about your account and not sure who to call? We have you covered with our Call Center that is available Monday through Thursday 8:30 AM to 5:00 PM; Friday 8:30 AM to 6:00 PM; and Saturday 8:30 AM to 1:00 PM. You can call 800.652.2328 anytime during those hours and talk with a Member Relations Specialist. Lost or Stolen CardsWas your Debit or Credit card misplaced or stolen and all of our offices are closed? It's okay because here is a phone number you can contact 24/7 to report a lost or stolen Credit or Debit card. Credit or Debit Card: 866.550.1691