KCCU MasterCard Online Services
Safely and securely activate your MasterCard or
report your lost or stolen card online.
Click for full details.
Important Numbers
MasterCard After Hours Support:
1-888-526-0404
Outside US & Canada:
1-206-352-4954
MasterCard Lost/Stolen :
1-800-682-6075
MasterCard Balance:
1-800-462-7777
MasterCard Activation:
1-800-411-6390
Outside US & Canada:
1-206-352-3477
MasterCard PIN Request:
1-877-746-6746
ATM-Debit Card Lost/Stolen:
1-800-472-3272