This Is Not a Government Office or Directory Service. We run a private reference site. We cannot place calls, change directory listings, verify caller identity, or issue official directory information. For any of those, you need to reach the right office or carrier directly. For emergencies, dial 911. For a mental-health or suicidal crisis, dial 988.
Need a Specific Phone Number?
Here's where to look for the numbers most people ask about in Colorado:
- City and town government numbers: see Colorado city and town numbers; 311 works only where a city runs it, such as Denver
- State agency and county numbers: see Colorado county and state office numbers, or search Colorado.gov Contacts Search directly
- School and university numbers: see Colorado school district directories
- Public utility numbers: see Colorado utility phone numbers - emergency lines are separate from customer service
- Public safety numbers: see Colorado emergency and crisis lines for 911, 988, 211, and non-emergency police and fire
- Health and social services: see health and human services in Colorado
- Public records (CORA) requests: the Secretary of State's CORA custodian takes written requests at CORA@coloradoSOS.gov or 1700 Broadway, Suite 550, Denver, CO 80290; general SOS line 303-894-2200
- Vital records: CDPHE Vital Records at 303-692-2200, weekdays; marriage records sit with county clerks and divorce records with district courts
- Area code reference: see Colorado phone area codes
- Phone code reference (N11, star codes, +1): see Colorado phone codes
- Reverse-lookup for an unknown caller: see reverse-lookup channels
- Reporting a scam or robocall: see how to report scam calls