Contact Us Phone: 800.652.2328 Email: memberrelations@atomiccu.com 24 Hour Telephone Teller: 855.432.8217 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 are some phone numbers you can contact 24/7 to report a lost or stolen Credit or Debit card. Credit or Debit Card: 866.550.1691