321171184
CITIBANK FSB
✓ Valid Checksum
Active
- Institution Name
- CITIBANK FSB
- Institution Type
- Commercial Bank
- Address
- 701 E 60th St N
- City / State
- NEW CASTLE, DE
- ZIP Code
- 57104
- Phone
- (800) 792-4000
Supported Transaction Types
✓ ACH Transfers
Direct deposit, bill pay, person-to-person transfers. Processed in 1–3 business days.
✓ Wire Transfers
Real-time, same-day settlement via Fedwire. Used for large or time-sensitive transfers.
✓ Check Processing
Printed on the bottom-left of checks. Used to route paper and electronic check payments.
Note: Some banks use a separate routing number for wire transfers. Always confirm wire routing numbers directly with your bank before initiating a wire transfer.
ABA Checksum Validation
Every ABA routing number includes a built-in check digit (the 9th digit) that allows banks to detect transcription errors automatically. The checksum uses a weighted formula: multiply each digit by 3, 7, 1, 3, 7, 1, 3, 7, 1 and the sum must be divisible by 10.
×3
3
9
×7
2
14
×1
1
1
×3
1
3
×7
7
49
×1
1
1
×3
1
3
×7
8
56
×1
4
4
Sum = 9 + 14 + 1 + 3 + 49 + 1 + 3 + 56 + 4 = 140
140 ÷ 10 = 14 remainder 0 → Valid routing number
Quick Reference
Other Routing Numbers for CITIBANK FSB
Large banks often have different routing numbers by state or region.
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