Search the Colorado Phone Directory

How to Find Phone Numbers in Colorado

Pick the channel that matches the office. State agencies and all 64 counties sit in one searchable state tool. Cities and towns keep their own contact pages, backed by a statewide municipal directory. Schools flow through the Colorado Department of Education and each district. Human services, public health, and benefits run county by county, which is a core Colorado pattern. No single database holds it all, so the starting point matters more than any one portal.

The broadest official starting point is Colorado.gov Contacts Search, which filters by state agency, county, and keyword.

Results there return an office name, phone, fax where available, a street address, and a link to the agency page. When that search comes up empty, the order below usually gets to a working number.

1. Need a state office or a county main line? Run it through Colorado.gov Contacts Search first.
2. Need a city or town department? Open that municipality's own website, or use the statewide municipal directory kept by the Colorado Municipal League.
3. Need a teacher, principal, or district office? Start with the district site or the CDE school contact downloads.
4. Need help services like food, shelter, or rent assistance? Dial 211 and let a navigator route the call.
5. Number not published anywhere? File a records request with the office's CORA custodian, in writing, with a clear description of what you want.

Colorado Area Codes at a Glance

Six codes serve the state, grouped into three regions. Denver, Boulder, and north-central Colorado share 303, 720, and 983. Southern and southeastern Colorado, including Colorado Springs and Pueblo, use 719. Northern and western Colorado, from Fort Collins to Grand Junction, use 970 plus the new 748 overlay. Every local call in Colorado now takes 10 digits.

The switch was gradual. Denver-area residents have dialed 10 digits since the overlay era began. The 719 and 970 regions kept 7-digit dialing until 2021, when the arrival of 988 forced the change. Permissive dialing started that April, and 10 digits became mandatory on October 24, 2021. The full regional breakdown lives on the Colorado phone area codes page.

Public Safety Phone Numbers in Colorado

Emergencies go to 911 everywhere in the state, in every area code. For a mental health or substance use crisis, 988 connects to the Colorado Mental Health Line by call, text, or chat, and it never closes. Everyday help services route through 211. Colorado has no statewide 311; that code works only where a city runs it, and Denver is the strongest example.

Crisis support in Colorado moved to a single front door. The state promotes the line through 988 Colorado, which explains the call, text, and chat options.

The older Colorado Crisis Services number, 844-493-8255, still answers, and TALK texted to 38255 still works. Non-emergency police lines vary by community. Grand Junction dispatch answers 970-242-6707 at all hours, Colorado Springs police take 719-444-7000, and the El Paso County Sheriff uses 719-390-5555.

The Colorado State Patrol splits the state into five districts. Its headquarters in Lakewood answers 303-239-4500, with a 24-hour line at 303-239-4501, and drivers can report aggressive driving in real time by dialing *277. Local troop offices are listed on the CSP district and troop directory.

Troop offices generally keep weekday business hours, so the directory advises calling ahead. Fort Collins Troop 3C answers 970-224-3027, and the El Paso Troop 2B office in Colorado Springs answers 719-635-0385.

Colorado City and Town Phone Directories

Colorado counts 273 incorporated cities and towns, and 270 of them belong to the Colorado Municipal League. That makes the CML Municipal Directory the closest thing to a statewide city phone book. It lists main phone numbers, addresses, and elected and appointed officials for member municipalities, and a full 2025 edition is published as a free PDF.

The directory landing page sits on the Colorado Municipal League site.

When a listing looks stale, the town's own website wins. CML staff can also point callers in the right direction at 303-831-6411 or toll-free at 866-578-0936. City service requests work differently in each place, as the two largest cities show.

Note: Fire protection in much of Colorado comes from special districts rather than city departments, so a fire station number may not be on the city's list at all.

County and Court Phone Numbers in Colorado

Counties do heavy lifting in Colorado. Human services, clerks and recorders, assessors, sheriffs, and local public health all answer at the county level. The county filter in Colorado.gov Contacts Search returns a main phone and address for each one, such as 719-523-6532 for Baca County or 970-725-3347 for Grand County. For clerk and recorder lines, the Secretary of State posts a county clerk roster PDF with phones, addresses, and emails for all 64 offices.

All 64 counties also belong to Colorado Counties Inc., the statewide county association.

CCI runs its own public directory portal, which helps when a county website buries its contact page. Court numbers follow the county map too. The Judicial Branch trial courts by county finder takes a city or county name and returns the courthouse, jury details, and the jury commissioner.

Sample courthouse lines show the range: Denver District Court answers 303-606-2300, the El Paso County Judicial Building answers 719-452-5000 with self-help at 719-452-5100, and Summit Combined Courts answer 970-453-2272. The State Public Defender's central office is 303-764-1400, with 21 regional trial offices, and the District Attorneys' Council runs a Find My DA tool covering all 23 elected DAs.

Colorado School and University Directories

School phone lookups start with the Colorado Department of Education. CDE publishes downloadable contact files for every public and non-public school in the state, plus the SchoolView data hub with district lists and maps. The department itself answers 720-739-3238 in Denver, and educator licensing has its own line at 720-739-3304 on weekdays.

The big districts each run their own directories and switchboards. A few numbers cover most calls:

• Denver Public Schools - 720-423-3200, with a searchable staff directory and an enrollment hotline at 720-423-3493
• Jeffco Public Schools - 303-982-6500 in Golden
• Douglas County School District - 303-387-0100, plus a 24-hour emergency line at 303-387-9999
• Cherry Creek Schools - 303-773-1184, with a dispatch center at 720-554-4911 that answers day and night
• Aurora Public Schools - 303-344-8060

Higher education adds two strong tools. Colorado State University answers 970-491-1111 and runs a public online directory that even supports reverse phone lookup for employee numbers. CU Boulder publishes people-search rules that explain who appears and who can opt out. For libraries, Denver Public Library's central line is 720-865-1111 with a branch-by-branch phone list, and the Colorado State Library answers 303-866-6900.

Colorado Public Utility Phone Numbers

Keep two lists for every utility: the emergency line and the customer service line. A gas leak or downed wire call should go to the emergency number, or to 911 first if there is immediate danger. Billing and account questions belong on the service line. Mixing the two wastes time on hold when minutes matter.

Digging anywhere in the state means a locate ticket first, at least three business days ahead, which is free and required by law. Tickets go through Colorado 811.

Emergency and damage tickets are taken around the clock, while the office keeps weekday hours. If a utility dispute stalls, the escalation path runs to PUC Consumer Affairs at 303-894-2070 or 1-800-456-0858.

Health and Social Services Numbers in Colorado

The state health department, CDPHE, answers 303-692-2000 in Denver, and its vital records section takes 303-692-2200. Below the state level, public health is local. Every county is covered by a local public health agency with its own line, such as 720-643-2400 in Douglas County or 719-578-3199 in El Paso County. The CDPHE agency finder matches a county to its department.

Benefits follow the same county pattern. Colorado human services are state-supervised but county-administered, so SNAP, child welfare, and adult protective calls go to the county office where the person lives. CDHS keeps the county directory and answers 303-866-5700 centrally. Denver Human Services takes 720-944-4347, Larimer County 970-498-6300, and Mesa County 970-241-8480.

Families looking for nutrition support can locate a clinic through the Colorado WIC clinic finder.

Denver Health's WIC appointment line is 303-602-6550. Hospital switchboards round out the health list: UCHealth's University of Colorado Hospital answers 720-848-0000, Denver Health 303-436-6000, and Children's Hospital Colorado 720-777-1234. Veterans reach VA Eastern Colorado at 303-399-8020 and VA Western Colorado in Grand Junction at 970-242-0731.

Colorado State Agency Phone Numbers

State offices keep direct lines, and the Contacts Search tool exposes most of them. Its search controls are simple, which is part of why it works as the default state phone book.

A handful of agency numbers come up constantly:

• Governor's constituent services - 303-866-2885 at the State Capitol
• Attorney General - 720-508-6000 in Denver
• DORA consumer protection - 303-894-7855 or 1-800-886-7675
• DMV driver license - 303-205-5600, appointments 720-295-2965
• Secretary of State - 303-894-2200 or 1-855-428-3555
• CDPHE main line - 303-692-2000

Note: Agency phone menus change with reorganizations, so confirm a number on the agency's own page before mailing anything or booking travel around a call.

Looking Up an Unknown Colorado Number

Official sources verify facts about a number, while third-party tools attempt to name the caller. NANPA's public records show which carrier originally held a Colorado prefix. The FCC's Reassigned Numbers Database tells subscribers whether a number changed hands. Name lookups come from private services, and the deep walkthrough sits on the Colorado phone numbers page.

Reporting Scam Calls in Colorado

The jury duty script leads the current wave. Callers pose as a sheriff's office or a court, claim a missed summons, and demand payment. The Colorado Attorney General warned in August 2025 that courts contact people about missed jury duty only by official mail, and that no court or law enforcement agency demands money by phone, text, or email. Denver's sheriff issued matching warnings after callers used the sheriff's own name, spoofed real detention center caller ID, and steered victims to payment kiosks. The AG has also flagged blackmail letters and calls that recycle names, addresses, and home photos pulled from public data.

Reports have set routes. Telemarketing complaints go to the FTC Do Not Call reporting page or 1-888-382-1222, and Coloradans should also register with the state's own program at Colorado No Call, reachable at 303-776-2678 or 800-309-7041. Robocalls, spoofing, and spam label problems belong with the FCC Consumer Complaint Center. Outright fraud goes to Stop Fraud Colorado, the Attorney General's reporting hub, and Denver residents can call the Denver DA Fraud Hotline at 720-913-9179.

Community Phone Resources Across Colorado

The single most useful community line is 211 Colorado, a database of more than 6,500 services supported by over 2,500 agencies. It covers housing, food, legal help, employment, health services, and crisis referrals, and its database is updated daily. Callers who cannot dial the three-digit code from a work or internet phone can use 866-760-6489, text a ZIP code to 898-211, or open a live chat with a navigator. The Western Slope has its own regional affiliate, Western Colorado 211, at 888-217-1215.

A few other community numbers earn a spot on the list. Safe2Tell, the school safety reporting line surfaced by districts across the state, answers 1-877-542-7233. Chambers of commerce anchor local employer research, with the Fort Collins Area Chamber at 970-482-3746. Tourism questions route through the Colorado Tourism Office and the Visit Denver and Visit Colorado Springs organizations.

Note: 211 navigators can search by need rather than by agency name, which helps when you know the problem but not which office handles it.

Phone Numbering Basics for Colorado

Every Colorado number follows the North American plan format: NPA-NXX-XXXX. The NPA is the area code, the NXX is the exchange prefix, and the last four digits identify the line. Local calls use 10 digits statewide, toll calls may need 1 plus 10, and operator-assisted calls may use 0 plus 10 depending on the provider. Four terms explain most of the jargon.

NPA

Numbering Plan Area, the 3-digit area code.

NXX

Central office or prefix code, the 3 digits after the area code.

Overlay

A second or third area code added to the same geography, which requires 10-digit dialing.

Rate Center

The billing and routing unit a prefix is assigned to, which may not match city limits.

Phone Service History in Colorado

Telephones reached Colorado early. Frederick O. Vaille secured Bell rights for the state in 1878, and Denver's first exchange opened the next year at 1514 Larimer Street, above Frick's Shoe Store, as the 17th exchange in the nation. By 1884 Denver had 752 subscribers making almost 5,000 calls a day. The Colorado Telephone Company, incorporated in 1881, folded into Mountain States Telephone and Telegraph in 1911, the company Coloradans knew for decades as Mountain Bell. Its seven-state headquarters filled the 1929 Telephone Building at 931 14th Street in Denver, and after the AT&T breakup the company merged into US WEST in 1984.

Numbering history is shorter but busy. Colorado got 303 as its lone area code in 1947. The 719 split carved off the south in 1988, the 970 split took the north and west in 1995, and overlays followed: 720 in 1998, 983 in 2022, and 748 in 2025.

Recent Phone News in Colorado

The 748 area code went live on July 7, 2025 as an overlay across the whole 970 region, with existing numbers unchanged. Scam volume keeps climbing: the Attorney General reported nearly 27,000 consumer complaints for 2025, up more than 10 percent in a year, with newer scams leaning on AI. Federal enforcement answered in kind, as the FCC removed more than 1,200 non-compliant voice providers from its Robocall Mitigation Database in August 2025. On the crisis side, wireless 988 calls now georoute toward local centers under rules that took effect in January 2025, and the Colorado Crisis Services website redirects to 988Colorado.com starting June 5, 2026.

Frequently Asked Questions

Do I have to dial 10 digits everywhere in Colorado?

Yes. The overlay regions have required it for years, and the 719 and 970 regions converted on October 24, 2021. The change protected 988, which existed as a regular prefix in those regions. Seven-digit local calls no longer connect anywhere in the state.

Which area codes belong to Denver?

Denver, Boulder, and the surrounding north-central communities share 303, 720, and 983. All three cover the same ground, so neighbors on one street can hold numbers in different codes. The 303 code is the state's original 1947 assignment and still carries the strongest local identity.

Is there a statewide 311 line?

No. In Colorado, 311 works only where a local government operates it. Denver runs the largest service, reachable at 3-1-1 in the city or 720-913-1311 from outside. Colorado Springs handles service requests through its GoCOS portal instead of a 311 line.

How do I find my county's human services number?

Use the CDHS county directory. Colorado administers benefits county by county, so SNAP, child welfare, and adult protective services all answer at the county office where you live. The state office in Denver, at 303-866-5700, can redirect a misplaced call.

What is the fastest way to cut down robocalls?

Register your number twice: once with the FTC's national registry at donotcall.gov and once with Colorado No Call. Then report violators to both, and lean on your carrier's free screening app to label or block suspect calls before they ring.

Will the 748 overlay change my 970 number?

No. Existing customers keep their numbers and their area code. New numbers get 748 only after the pool of available 970 prefixes runs out, so the new code will appear gradually on new lines and added services across northern and western Colorado.