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312-770

You are reviewing the Area Code (NPA/NXX) report for 312-770. Did you mean to search the SMS short code 312770?

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🇺🇸 DSN NORTHCOM Area Code Detected

The area code you entered, 312, overlaps with the DSN network for the Continental United States and Puerto Rico under Northern Command (NORTHCOM), though it could also be part of standard civilian phone numbers.

Raw Number312770
Basic Format312-770
NPA (Area Code)312
NXX770

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeAssign DateCityStateRegionBlock Effective Date
312-770-0XXX6534NEW CINGULAR WIRELESS PCS, LLC - ILCHICGOZN01AS10/07/2008CHICAGO ZONE 01ILMW01/27/2009
312-770-1XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-2XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-3XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-4XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-5XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-6XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-7XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-8XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-9XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-770-XXXX9329ILLINOIS BELL TEL COCHICGOZN01ASCHICAGO ZONE 01IL

Business/Government Phones on the 312-770 Prefix

PhoneNameAddress
312-770-2000Saint Mary of Nazareth Hospital2233 West Division Street Chicago 60622 US

Reports

Anonymous User from , IL

August 15, 2025 at 12:04 PM

312-770-7432 reported as a Robocall. Received on July 18, 2025 at 4:31 PM.
Call for Dropped call or no message

Anonymous User from Chicago, Illinois

April 25, 2025 at 2:57 PM

312-770-7355 reported as a Robocall. Received on April 25, 2025 at 1:55 PM.
Call for Medical & prescriptions

Anonymous User from Chicago, Illinois

March 22, 2025 at 10:37 AM

312-770-2079 reported as a Live Voice or Other. Received on March 20, 2025 at 11:48 AM.
Call for Dropped call or no message

Anonymous User from Morton Grove, Illinois

June 29, 2024 at 3:56 PM

312-770-2969 reported as a Robocall. Received on June 21, 2024 at 11:54 AM.

Anonymous User from Wheeling, Illinois

April 2, 2024 at 2:23 PM

312-770-4726 reported as a Robocall. Received on March 29, 2024 at 12:21 PM.
Call for Dropped call or no message

Anonymous User from Wheeling, Illinois

March 12, 2024 at 11:10 AM

312-770-9697 reported as a Robocall. Received on March 11, 2024 at 12:14 PM.
Call for Dropped call or no message

Anonymous User from Wheeling, Illinois

March 8, 2024 at 11:23 AM

312-770-2901 reported as a Robocall. Received on March 8, 2024 at 10:22 AM.
Call for Dropped call or no message

Anonymous User from Round Lake, Illinois

February 20, 2023 at 11:41 AM

312-770-7428 reported as a Robocall. Received on February 20, 2023 at 10:15 AM.

Anonymous User from Oswego, Illinois

August 12, 2022 at 1:18 PM

312-770-8293 reported as a Robocall. Received on June 30, 2022 at 10:24 AM.

Anonymous User from Apache Junction, Arizona

June 28, 2022 at 3:06 PM

312-770-6143 reported as a Robocall. Received on June 28, 2022 at 11:55 AM.

Anonymous User from Barrington, IL

May 19, 2022 at 2:58 PM

312-770-1249 reported as a Prerecorded Voice. Received on May 19, 2022 at 9:45 AM.
Unwanted call for Credit Card Interest Rates Services
Contacted via Internet (VOIP)

Most 'popular' numbers on this prefix:

312-770-1XXX: 312-770-1212 | 312-770-1222 | 312-770-1234 | 312-770-1240 | 312-770-1245 | 312-770-1247 |
312-770-2XXX: 312-770-2000 | 312-770-2002 | 312-770-2006 | 312-770-2070 | 312-770-2077 | 312-770-2079 | 312-770-2900 | 312-770-2902 | 312-770-2909 | 312-770-2992 | 312-770-2995 | 312-770-2998 |
312-770-4XXX: 312-770-4720 | 312-770-4722 | 312-770-4724 |
312-770-6XXX: 312-770-6140 | 312-770-6141 | 312-770-6145 | 312-770-6191 | 312-770-6192 | 312-770-6197 |
312-770-7XXX: 312-770-7350 | 312-770-7353 | 312-770-7355 | 312-770-7371 | 312-770-7372 | 312-770-7373 | 312-770-7420 | 312-770-7423 | 312-770-7424 |
312-770-8XXX: 312-770-8247 | 312-770-8258 | 312-770-8282 | 312-770-8291 | 312-770-8292 | 312-770-8297 |
312-770-9XXX: 312-770-9692 | 312-770-9698 | 312-770-9699 |