Bank Branches › Closed and merged banks › Colorado › Mile High Banks
What happened to Mile High Banks?
Mile High Banks in Longmont, CO (earlier called The First National Bank of Limon and 2 other names) merged into The First National Bank of Santa Fe of Albuquerque, NM on Nov 1, 2013. After 1 more change of hands, what was Mile High Banks is today part of Sunflower Bank, National Association (Dallas, TX).
The chain, step by step
From the day it opened to the bank at the end of the chain today. Each step is one entry in the FDIC's record.
- 1919The First National Bank of Limon opens in Longmont, CO
- Dec 18, 2002renamed Horizon Banks, National Association
- Dec 1, 2007renamed Mile High Banks, National Association
- Apr 1, 2008renamed Mile High Banks
- Nov 1, 2013MERGEDMile High Banks merged into The First National Bank of Santa Fe of Albuquerque, NM.FDIC certificate 3036 ends; its business continues under certificate 2239.
- Jun 19, 2017MERGEDThe First National Bank of Santa Fe of Albuquerque, NM merged into Sunflower Bank, National Association of Dallas, TX.FDIC certificate 2239 ends; its business continues under certificate 4767.
- TodayOPEN
Sunflower Bank, National AssociationMain office Dallas, TX · FDIC certificate 4767 · 102 offices in 10 states on June 30, 2026Every Sunflower Bank, National Association office → Website on file with the FDIC: www.sunflowerbank.com
If you still have something from Mile High Banks
A lien that was never released
If a paid-off mortgage, home-equity line or car loan still shows Mile High Banks as lienholder, start with Sunflower Bank, National Association. In a merger the surviving bank takes over the other bank's loans, so it is the bank to ask for a recordable lien release; if the loan was sold along the way, it can tell you to whom.
The FDIC says it cannot process lien releases for banks that merged or were acquired without government assistance, which is what the record shows here.
Record the release with the same county office that recorded the original mortgage or deed of trust.
An old account, passbook or CD
Ask Sunflower Bank, National Association to search for the account under the name Mile High Banks. A passbook or certificate shows an account existed. It doesn't show the money is still there, and the OCC notes that federal rules require banks to keep most account records for five years.
Accounts nobody touches are eventually turned over to a state. The OCC puts the usual wait at three to five years with no activity, set by each state's law. Search the unclaimed-property program of the state of the owner's last known address on the bank's records, and any other state they lived in. It is free to search and to claim through a state's own site, and MissingMoney.com, an official site of the state administrators' association, searches most states at once.
A safe deposit box
Ask Sunflower Bank, National Association which branch now holds boxes from the Mile High Banks office you used. The OCC says a box with no activity for three to five years (the period is set by state statute) is likely treated as dormant, and its contents may be turned over to the state's unclaimed-property program.
Box contents are not covered by FDIC insurance.
Not sure this is your bank?
Many banks shared a name. Match the city and the years above against your paperwork, or search again with the town.
Credit unions were never FDIC-insured and are not in this record; the NCUA credit union lookup covers those. Banks that closed before about 1970 are not in the FDIC's list either.
One caution: banks also sell single branches. If the office you used was sold to a different bank along the way, the account went with the branch, not with this chain. The office list below shows which bank each office reports under now.
This page is drawn from FDIC records and federal guidance. It is not legal advice, and BankBranches is not a bank or a government office. More detail: lien releases · old passbooks and CDs · safe deposit boxes · unclaimed money.
Where the guidance comes from ▾
Its offices in the FDIC deposit reports
15 offices filed under this charter in some year from 1994 on. 2 are still open as of June 30, 2026.
| Office | Now |
|---|---|
| 790 Main StLimon, CO | OpenThe Eastern Colorado Bank |
| 615 24th StGolden, CO | OpenSunflower Bank, National Association |
| 1573 Market StDenver, CO | No longer reported |
| 3650 E. 1st Ave., Suite 100Denver, CO | No longer reported |
| 450 17th AvenueDenver, CO | No longer reported |
| 9361 S. Parker Rd.Parker, CO | No longer reported |
| 1726 Hover StreetLongmont, CO | No longer reported |
| 3002 Bluff StreetBoulder, CO | No longer reported |
| 601 South Main StreetLongmont, CO | No longer reported |
| 1499 W 120th Ave Suite 110Westminster, CO | No longer reported |
| 2950 North Garfield AvenueLoveland, CO | No longer reported |
| 8400 E. Crescent Parkway Suite 100Englewood, CO | No longer reported |
| 8906 W. Bowles AveLittleton, CO | No longer reported |
| 1700 Kylie Drive Suite 200Longmont, CO | No longer reported |
| 700 Main StreetLimon, CO | No longer reported |
Banks folded into Mile High Banks
1 bank merged directly into this charter.
| Bank | Ended |
|---|---|
| Citizens National BankLimon, CO | Mar 29, 1991 |
Source: FDIC BankFind institution and history records, read Nov 15, 2026. The FDIC's list covers banks that ended in about 1970 or later. Look up certificate 3036 in the FDIC BankFind Suite to see the government's own entry. Corrections: me@byclaude.net.