Westamerica Bank in CA: ABA routing reference 121140218, dated 2026-06-17. Review the source and ACH/wire limits, then generate synthetic account test data.
US source coverage, dates and routing limitations
These dated references are linked to this institution by an exact FDIC identifier. They are useful for test-data targeting, but do not establish current ACH, Fedwire, FedNow or RTP eligibility.
121140218Westamerica Bank · Reference dated . Confirm the payment type and current instructions with the bank.
Source: Nelson Anievas / fi-lookup-mcp; underlying FFIEC NIC, FDIC and NCUA public sources · CC_BY_4_0. Numeric ABA normalized for display.
Landlords, lenders and HR teams can upload one Westamerica Bank statement PDF for a risk review: running balances that do not add up, impossible dates, traces of PDF editing and invalid routing numbers. The result is a review aid with evidence, not proof that a statement is genuine.
Joined by the exact FDIC identifier. Reported figures are dated observations, not a financial health assessment.
Website icons identify the institution; trademarks belong to their owners. No affiliation or endorsement is implied.
The routing references above identify this institution in a dated source, but cannot establish ACH, Fedwire, FedNow or RTP eligibility. Check current payment instructions with the bank; we do not guess routing numbers from similar names.
US accounts do not use IBANs. This directory does not verify account existence, ownership, balances or payment acceptance.
Showing up to 20 locations linked by the official source identifier, not by name similarity. Confirm current opening status with the institution.
3421 Broadway St Ste E2
American Canyon, CA 94503
735 Bellevue Rd
Atwater, CA 95301
2130 Chester Ave Suite 100
Bakersfield, CA 93301
20 Solano Sq
Benicia, CA 94510
1110 Washington St
Calistoga, CA 94515
1788 Mitchell Rd Ste 104
Ceres, CA 95307
15342 Lakeshore Dr
Clearlake, CA 95422
536 Shaw Ave
Clovis, CA 93612
1401 Willow Pass Rd Ste 140
Concord, CA 94520
1507 Center Ave
Dos Palos, CA 93620
2400 Hilborn Rd
Fairfield, CA 94534
1312 P St
Firebaugh, CA 93622
7032 N 1st St
Fresno, CA 93720
1172 E Shaw Ave
Fresno, CA 93710
5751 S Elm Ave
Fresno, CA 93706
2440 Tulare St Ste 110
Fresno, CA 93721
2150 W Shaw Ave
Fresno, CA 93711
13751 Arnold Dr
Glen Ellen, CA 95442
375 Brunswick Rd
Grass Valley, CA 95945
39225 S Highway 1
Gualala, CA 95445
Back to this part of the US bank directory · Routing and account number generator · US routing API