Stage 2 Fire Restrictions Enacted for Western Boulder County; Stage 1 Fire Restrictions Enacted for Eastern Boulder County.

A Heat Advisory is in effect for Boulder County. Learn more.

Firearm Serial Number Check

Firearm Serial Number Check

Under law SB25-205, Federal Firearms Licensees (FFLs) are authorized to request serial number checks prior to purchasing firearms from private sellers. Local county sheriff’s offices or police departments are required to complete the serial number check and deliver the results within three days of the request. The FFL shall be informed if the firearm is reported as stolen, lost or involved in an open criminal investigation. If a licensee is located within city limits, they must request the serial number check from their local police department. If a licensee is in an unincorporated county, they must request a firearms serial number check from their local sheriff’s office.

This act also allows a licensee to perform the serial number check themselves if they have permission to access the federal government’s firearm tracing system. The licensee is subject to reporting requirements if the serial number search is done themself.

Request Serial Number Check

If you are an FFL and would like to request a serial number check, please visit our License Director website and complete an online request form.

Contact Us

Sheriff's Headquarters

5600 Flatiron Parkway
Boulder, CO 80301

Monday-Friday
8 a.m. - 5 p.m.
Main: 303-441-3600

Email bcso@bouldercounty.gov

Boulder County Jail

3200 Airport Road
Boulder, CO 80301

Monday - Friday
8 a.m. - 5 p.m.
Main: 303-441-4600

Communications Center

3280 Airport Road
Boulder, CO 80301

Non-Emergency:
303-441-4444

Sheriff badge

Connect With Us