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Area Code Info / Illinois / 312
312
Illinois ChicagoGeographicPopular

Area Code 312

Chicago, Illinois

Browse Numbers in This Area Code
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📞
2,163
Available Numbers
🏙️
10
Cities Covered
🕐
Chicago
Timezone
📋
10-digit
Dialing Rules
Coverage Area

312 Cities and regions covered

Illinois · IL

Major Cities

Chicago The Loop Near North Side Near South Side Gold Coast River North Streeterville South Loop West Loop Old Town
In Service 1947-01-01
Status Active
Area Code History

312

312是伊利诺伊州最早的区号之一，1947年设立时覆盖芝加哥全市。经多次拆分后现仅覆盖芝加哥市中心Loop区域。

Dialing Rules

312

10-digit

When dialing 312 area code numbers, follow these rules:

  • Local calls require full 10-digit dialing (area code + 7-digit number)
  • Long-distance calls require 1 + area code + 7-digit number
Why 312 is Valuable for Business

312 · Chicago

The 312 area code covers Chicago and surrounding areas, making it one of the most commercially valuable area codes in Illinois. Owning a premium 312 number enhances your business image and customer trust.

🔥 作为全美最热门的区号之一，312 号码需求量大，优质号码稀缺，值得收藏。
Premium Numbers

312 Premium numbers in this area code

(312) 888-8374
Chicago, IL
$999.98
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(312) 888-8357
Chicago, IL
$999.98
View Details
(312) 888-8358
Chicago, IL
$999.98
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(312) 888-8359
Chicago, IL
$999.98
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(312) 888-8360
Chicago, IL
$999.98
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(312) 888-8361
Chicago, IL
$999.98
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(312) 888-8362
Chicago, IL
$999.98
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(312) 888-8363
Chicago, IL
$999.98
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(312) 888-8364
Chicago, IL
$999.98
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(312) 888-8366
Chicago, IL
$999.98
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(312) 888-8367
Chicago, IL
$999.98
View Details
(312) 888-8368
Chicago, IL
$999.98
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(312) 888-8369
Chicago, IL
$999.98
View Details
(312) 888-8370
Chicago, IL
$999.98
View Details
(312) 888-8371
Chicago, IL
$999.98
View Details
(312) 888-8372
Chicago, IL
$999.98
View Details
(312) 888-8373
Chicago, IL
$999.98
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(312) 888-8389
Chicago, IL
$999.98
View Details
(312) 888-8385
Chicago, IL
$999.98
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(312) 888-8386
Chicago, IL
$999.98
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(312) 888-8387
Chicago, IL
$999.98
View Details
(312) 888-8388
Chicago, IL
$3,199.98
View Details
(312) 888-8391
Chicago, IL
$999.98
View Details
(312) 888-8392
Chicago, IL
$999.98
View Details
View All 312 Numbers
FAQ

312 FAQ

What state is the 312 area code in?
The 312 area code is in Illinois (IL), primarily covering Chicago and surrounding areas.
How do I get a premium 312 area code number?
You can search and buy premium 312 numbers on GreatNumber. We offer one-time payment with lifetime ownership — no monthly fees or hidden charges. We provide full porting assistance after purchase.
Can I port a 312 number to another carrier?
Yes, all numbers purchased on GreatNumber can be ported to any carrier of your choice (T-Mobile, AT&T, Verizon, etc.). Porting typically takes 3-14 business days, and we provide full bilingual support.
Related Area Codes

Other area codes related to 312

217 Springfield Illinois 224 Chicago Illinois 309 Peoria Illinois 331 Aurora Illinois 447 Champaign Illinois 464 Chicago Illinois

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Browse by Number Pattern

Discover patterned numbers in the 312 area code.

🔢 Repeating Numbers 8888, 6666, 9999 🧧 Chinese Lucky Numbers 168, 520, 1314, 666 💰 "Yi Lu Fa" 168 Numbers Prosperity all the way 📞 Toll-Free Numbers 800, 888, 877 & more 🏢 Browse by Industry 16 industries to choose from
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