Bank routing number ยท Carlyle, Illinois
1NB Bank Routing Number (ABA): 081906505
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The 1NB Bank routing number is 081906505. It is the primary ABA routing transit number on the bank's FFIEC National Information Center record, refreshed here on October 27, 2026.
1NB Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 10.29% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $319.0M
- Tier 1 leverage ratio, Q2 2026
- 10.29%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Domestic offices
- 5 FDIC institution directory, current count
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1878
Full financial profile · Is 1NB Bank safe? · 1NB Bank call report · Branch locations
1NB Bank routing numbers on file
| Routing number | Type | Status | Source |
|---|---|---|---|
| 081906505 | Primary ABA | Active | FFIEC NIC |
Record refreshed here on October 27, 2026. NIC holds one primary number per bank; 1NB Bank publishes any other numbers it uses itself.
What the digits mean
The first two digits, 08, place this number in the Federal Reserve Bank of St. Louis's district (District 8). Digits five through eight, 0650, identify the institution within that district. The last digit, 5, is a check digit, and the number passes the standard check: weight the nine digits 3, 7, 1, 3, 7, 1, 3, 7, 1 and the sum is a multiple of 10.
Before you send money to 1NB Bank
A routing number tells the payment network which financial institution holds an account. You give it with an account number for ACH transfers through the automated clearing house, such as direct deposit, bill pay and transfers from a checking account, which usually settle in one to two business days. An international wire to a US account normally needs the bank's SWIFT code as well.
Match this number against the one on your 1NB Bank checks or in its online banking. Ask the bank for wire instructions (www.1nbbank.bank). Our record does not show whether this number receives wires. The Federal Reserve's E-Payments Routing Directory shows it: its Fedwire participant search lists the numbers that can receive Fedwire transfers, and its FedACH search lists those that receive ACH payments. How to confirm any routing number.
About 1NB Bank
1NB Bank is headquartered in Carlyle, Illinois and was established in 1878. It is in the ST. LOUIS, MO-IL metro area. It reported $319.0M in total assets and $260.1M in deposits for Q2 2026, the 146th largest of the 319 banks headquartered in Illinois. See the largest banks in Illinois by total assets. It reports 5 domestic offices. Its deposits have been FDIC insured since 1934. Its primary federal regulator is the Federal Reserve.
What the digits in 081906505 mean
The first four digits, 0819, are the Federal Reserve routing symbol. The prefix 08 places the number in the 8th Federal Reserve District (St. Louis). That is also the district where the bank is headquartered. Digits five through eight, 0650, identify the institution within its Federal Reserve district. The last digit, 5, is a check digit. Weighting the digits 3, 7 and 1 in turn gives 3 x 14 + 7 x 8 + 12 = 110, a multiple of 10, so 081906505 is a well-formed routing number. A mistyped digit almost always breaks that sum.
What is the 1NB Bank routing number?
The 1NB Bank routing number is 081906505. It is the primary ABA routing transit number registered to 1NB Bank, headquartered in Carlyle, IL. The number comes from the FFIEC National Information Center institution record, last refreshed here on October 27, 2026.
What is the 1NB Bank wire routing number?
This page lists the primary routing number registered to 1NB Bank. The record does not say whether the bank uses the same number for wire transfers. Confirm the wire routing number with 1NB Bank before sending a wire.
Is ABA number 081906505 the routing number for 1NB Bank?
Yes. It is the primary routing number registered to 1NB Bank.
Which bank uses routing number 081906505?
It belongs to 1NB Bank, headquartered in Carlyle, IL. It is the bank's primary ABA routing number (FDIC certificate 14761).
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View 1NB Bank's full profile →
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Regulator records: FDIC BankFind (cert 14761) · FFIEC NIC profile (RSSD 614948)