FIRST BANK
Routing Number: 121137506
600 JAMES S MCDONNELL BLVD
HAZELWOOD, MO 63042-0000
(800) 760-2265
11 E Lockwood
Webster Groves, MO 63119
1526 West Highway 70 South Service Road
Wentzville, MO 63385
2462 Taylor Road
Wildwood, MO 63040
9801 Westheimer Road 10th Floor, Suite 1060
Houston, TX 77042
Where can I find a list of routing numbers for different banks?
How do I use my routing number for electronic funds withdrawal (EFT)?
How do I correct a routing number if I entered it incorrectly?
What's the purpose of the check's magnetic ink character recognition (MICR) line?
Is a routing number the same as an ABA number?
Frequently asked questions (FAQs) related to bank routing numbers and bank routing information:
frequently asked questions (FAQs) about Bank ABA routing numbers and their purposes:
Frequently asked questions (FAQs) about international bank routing codes

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