102101519
FIRSTBANK
✓ Valid Checksum
Active
- Institution Name
- FIRSTBANK
- Institution Type
- Commercial Bank
- City / State
- LAKEWOOD, CO
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
1
3
×7
0
0
×1
2
2
×3
1
3
×7
0
0
×1
1
1
×3
5
15
×7
1
7
×1
9
9
Sum = 3 + 0 + 2 + 3 + 0 + 1 + 15 + 7 + 9 = 40
40 ÷ 10 = 4 remainder 0 → Valid routing number
Other Routing Numbers for FIRSTBANK
Large banks often have different routing numbers by state or region.
- 102005916 CO
- 102006025 CO
- 102103999 CO
- 102105269 CO
- 107001672 CO
- 107001805 CO
- 107002503 CO
- 107002532 CO
- 107003010 CO
- 107003298 CO
- 107003612 CO
- 107004352 CO
- 107004381 CO
- 107005490 CO
- 107005801 CO
- 107005924 CO
- 107006305 CO
- 107006347 CO
- 107006431 CO
- 107002192 CO