Area Code 861 Location & Details
State / Region: Illinois • Country: United States
Major Cities Covered: Peoria, Bloomington, Normal, Moline, Romeoville, Rock Island, Pekin, Galesburg, East Peoria, Crest Hill
Area Code 861 Geographic Map
Interactive location bounds and coverage area for Illinois (Central Timezone)
Where is Area Code 861 Located?
Telephone area code 861 is assigned to Illinois in United States. It serves cities and metropolitan communities including Peoria, Bloomington, Normal, Moline, Romeoville, Rock Island, Pekin, Galesburg, East Peoria, Crest Hill.
For local and long-distance calls within area code 861, standard 10-digit dialing (861) XXX-XXXX applies.
Who Called Me from Area Code 861?
Received an unknown call, missed call, or text scam from area code 861? Here is how to trace who is calling from 861 area code and verify unknown numbers safely:
Legitimate contacts usually leave a detailed voicemail or caller ID record.
Robocallers often fake incoming caller ID numbers using your local 861 prefix to boost pick-up rates.
Search public white-pages or use caller intelligence guides before returning unfamiliar calls.
How to Call Area Code 861 & Dialing Format
When placing a phone call to a number in area code 861, follow the correct dialing format depending on your calling location:
- Calling from inside the US / Canada (+1): Dial
1 + (861) + 7-digit number. - Calling from an international location outside +1: Dial your country's international exit code (e.g.
011in US or+on mobile) +1+861+7-digit number. - Do I need to dial area code 861 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.
Top Cities & Municipalities Served in Area Code 861
Urban centers, census places, and communities within the +1-861 calling area
| City Name | County | Population | % of 861 Pop |
|---|---|---|---|
| Peoria | Peoria County | 110,920 | 16.2% |
| Bloomington | McLean County | 78,804 | 11.5% |
| Normal | McLean County | 53,275 | 7.8% |
| Moline | Rock Island County | 42,362 | 6.2% |
| Romeoville | Will County | 41,281 | 6.0% |
| Rock Island | Rock Island County | 36,225 | 5.3% |
| Pekin | Tazewell County | 31,277 | 4.6% |
| Galesburg | Knox County | 28,581 | 4.2% |
| East Peoria | Tazewell County | 22,088 | 3.2% |
| Crest Hill | Will County | 20,695 | 3.0% |
| East Moline | Rock Island County | 20,453 | 3.0% |
| Morton | Tazewell County | 17,565 | 2.6% |
| Washington | Tazewell County | 15,902 | 2.3% |
| Macomb | McDonough County | 14,530 | 2.1% |
| Canton | Fulton County | 13,297 | 1.9% |
| Kewanee | Stark County | 12,115 | 1.8% |
| Monmouth | Warren County | 8,599 | 1.3% |
| Silvis | Rock Island County | 7,979 | 1.2% |
| Geneseo | Henry County | 6,505 | 1.0% |
| Chillicothe | Marshall County | 6,033 | 0.9% |
Counties Covered by Area Code 861
Geographic county distribution and population coverage across Illinois
| County Name | Total Population | % of 861 Area | % of County |
|---|---|---|---|
| McLean County | 171,512 | 20.1% | 80% |
| Peoria County | 178,541 | 19.4% | 74% |
| Rock Island County | 141,591 | 16.9% | 82% |
| Tazewell County | 129,982 | 14.1% | 74% |
| Will County | 708,980 | 9.1% | 9% |
| Knox County | 47,964 | 4.6% | 65% |
| Woodford County | 38,198 | 2.8% | 50% |
| McDonough County | 26,115 | 2.5% | 66% |
| Henry County | 48,193 | 2.3% | 33% |
| Fulton County | 32,807 | 2.2% | 47% |
| Stark County | 5,269 | 1.8% | 100% |
| Warren County | 16,116 | 1.7% | 71% |
| Marshall County | 11,571 | 1.2% | 72% |
| Mercer County | 15,292 | 0.5% | 23% |
| De Witt County | 15,244 | 0.4% | 19% |
| Mason County | 12,489 | 0.4% | 22% |
☎️Area Code 861 Exchange Prefixes & Carriers
Showing 14 of 14 central office 3-digit prefixes and assigned telecom carriers
| Prefix | Line Usage | Rate Center | Assigned Carrier | Assign Date |
|---|---|---|---|---|
| (861) 211- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 311- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 411- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 511- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 555- | 📞Landline | DIR ASST | MULTIPLE OCN LISTING | N/A |
| (861) 611- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 700- | 📞Landline | IL | Local Exchange Carrier | N/A |
| (861) 711- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 811- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 911- | 📞Landline | XXXXXXXXXX | MULTIPLE OCN LISTING | N/A |
| (861) 950- | 📞Landline | IL | Local Exchange Carrier | N/A |
| (861) 958- | 📞Landline | IL | Local Exchange Carrier | N/A |
| (861) 959- | 📞Landline | IL | Local Exchange Carrier | N/A |
| (861) 976- | 📞Landline | IL | Local Exchange Carrier | N/A |
Frequently Asked Questions about Area Code 861
Where is area code 861 located?
Area code 861 is located in Illinois (United States), serving cities like Peoria, Bloomington, Normal, Moline, Romeoville, Rock Island, Pekin, Galesburg, East Peoria, Crest Hill.
What timezone is area code 861?
Area code 861 operates in the Central timezone.
What state is area code 861?
Area code 861 is assigned to the state / telecom territory of Illinois.
Is area code 861 a scam or dangerous?
Area code 861 is an official geographic area code for Illinois. However, beware of robocaller spoofing.
Illinois State Area Codes
View complete directory of telephone area codes assigned to Illinois.
Explore Illinois DirectoryGet a 861 Business Phone Number
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Scam Area Codes 2026Overlay & Nearby Area Codes for Illinois
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