Bank routing number ยท Lamar, Colorado
Frontier Bank Routing Number (ABA): 102100879
BankRegReports is independent of Frontier Bank and never asks for online banking logins or passwords.
The Frontier Bank routing number is 102100879. It is the primary ABA routing transit number on the bank's FFIEC National Information Center record, refreshed here on October 27, 2026.
Frontier Bank at a glance
Its CET1 capital ratio was 18.00% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $436.4M
- CET1 ratio, Q2 2026
- 18.00%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Domestic offices
- 8 FDIC institution directory, current count
- Latest call report
- Q2 2026, FFIEC 041
- Established
- 1934
Full financial profile · Is Frontier Bank safe? · Frontier Bank call report · Branch locations
Frontier Bank routing numbers on file
| Routing number | Type | Status | Source |
|---|---|---|---|
| 102100879 | Primary ABA | Active | FFIEC NIC |
Record refreshed here on October 27, 2026. NIC holds one primary number per bank; Frontier Bank publishes any other numbers it uses itself.
What the digits mean
The first two digits, 10, place this number in the Federal Reserve Bank of Kansas City's district (District 10). Digits five through eight, 0087, identify the institution within that district. The last digit, 9, 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 Frontier 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 Frontier Bank checks or in its online banking. Ask the bank for wire instructions (http://www.frontierbankco.com). 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 Frontier Bank
Frontier Bank is headquartered in Lamar, Colorado and was established in 1934. It reported $436.4M in total assets and $388.9M in deposits for Q2 2026, the 23rd largest of the 63 banks headquartered in Colorado. It reports 8 domestic offices. Its deposits have been FDIC insured since 1934. Its primary federal regulator is the FDIC. 2 other banks and credit unions headquartered in Lamar have a routing number listed here.
What the digits in 102100879 mean
The first four digits, 1021, are the Federal Reserve routing symbol. The prefix 10 places the number in the 10th Federal Reserve District (Kansas City). That is also the district where the bank is headquartered. Digits five through eight, 0087, identify the institution within its Federal Reserve district. The last digit, 9, is a check digit. Weighting the digits 3, 7 and 1 in turn gives 3 x 10 + 7 x 7 + 11 = 90, a multiple of 10, so 102100879 is a well-formed routing number. A mistyped digit almost always breaks that sum.
What is the Frontier Bank routing number?
The Frontier Bank routing number is 102100879. It is the primary ABA routing transit number registered to Frontier Bank, headquartered in Lamar, CO. The number comes from the FFIEC National Information Center institution record, last refreshed here on October 27, 2026.
What is the Frontier Bank wire routing number?
This page lists the primary routing number registered to Frontier Bank. The record does not say whether the bank uses the same number for wire transfers. Confirm the wire routing number with Frontier Bank before sending a wire.
Is ABA number 102100879 the routing number for Frontier Bank?
Yes. It is the primary routing number registered to Frontier Bank.
Which bank uses routing number 102100879?
It belongs to Frontier Bank, headquartered in Lamar, CO. It is the bank's primary ABA routing number (FDIC certificate 14730).
Routing numbers of similar-size institutions in Colorado
- Bank, Lamar, CO
- Community State Bank: 102107364
- Credit union, Lamar, CO
- Fellowship Credit Union: 302176904
- Bank, Denver, CO
- Bankers' Bank of the West: 102003743
- Credit union, Littleton, CO
- Colorado Credit Union: 302075267
- Bank, Dolores, CO
- The Dolores State Bank: 102104927
- Bank, Calhan, CO
- Farmers State Bank of Calhan: 102103562
- Bank, Monument, CO
- Integrity Bank & Trust: 107006994
- Credit union, Denver, CO
- Denver Community Credit Union dba Zing Credit Union: 302075694
View Frontier Bank's full profile →
More in Colorado: routing numbers and banks. Have a number and want to know whose it is? Use the routing number lookup. New to routing numbers? What a routing number is.
Regulator records: FDIC BankFind (cert 14730) · FFIEC NIC profile (RSSD 191355)