What does it mean?
Technology
Business
Society
Internet
Authority
Science
Various
World
Medical
Area code
for Illinois - Chicago is
312
Similar to 312
240
- Maryland
242
- Bahamas - Caribbean
246
- Barbados - Caribbean
248
- Michigan - Oakland County and Pontiac
250
- British Columbia
251
- Alabama
252
- North Carolina
View all in US Phone Codes