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Contact & Locations

  • Phone

    St. Louis Area:


    Metro East:


    Lost or Stolen Card?

    Call to report lost or stolen debit/credit cards.

    Report Lost or Stolen Card During Non-Business Hours:

    888.918.7744 or 866.820.3035

    Routing Number

    Our routing/transit number is:


    Contact Form

    • Before filling out this form, see if we can help you right now with a Live Chat.
    • If you feel this issue needs to be handled by Arsenal's Supervisory Committee, click here.
  • Locations & Hours
  • Shared Branches

    shared branches image

    Use more than 5,000 credit union shared branches across the country, including more than 50 in St. Louis.
    Find a Branch

    Shared ATMs

    shared atms image

    Use free CO-OP Network ATMs- there are nearly 30,000 across the country, including more than 250 in St. Louis.
    Find an ATM

    Mobile Apps

    Find a shared branch or a CO-OP Network
    ATM using the free locator app.

    Apple iOS

    How Shared Branches Work


    Watch this short video to learn how a shared branch works

    Electronic Services Agreement and Disclosure

  • Upcoming Holidays

    Memorial Day Monday, May 27
    Independence Day Thursday, July 4
    Labor Day Monday, September 2
    Columbus Day Monday, October 14
    Veterans Day Monday, November 11
    Thanksgiving Day Thursday, November 28
    Christmas Day Wednesday, December 25