312-256

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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 Number	312256
Basic Format	312-256
NPA (Area Code)	312
NXX	256

Call Routing Data

NPA-NXX-X	OCN	Company	Rate Center	Use Type	Assign Date	City	State	Region	Block Effective Date
312-256-0XXX	7229	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	CHICGOZN01	RT		CHICAGO ZONE 01	IL	MW
312-256-1XXX	6333	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	CHICGOZN01	AS	07/20/2010	CHICAGO ZONE 01	IL	MW	08/16/2010
312-256-2XXX	7229	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	CHICGOZN01	RT		CHICAGO ZONE 01	IL	MW
312-256-3XXX	6333	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	CHICGOZN01	AS	07/20/2010	CHICAGO ZONE 01	IL	MW	08/16/2010
312-256-4XXX	6534	NEW CINGULAR WIRELESS PCS, LLC - IL	CHICGOZN01	AS	02/17/2010	CHICAGO ZONE 01	IL	MW	03/01/2010
312-256-5XXX	6534	NEW CINGULAR WIRELESS PCS, LLC - IL	CHICGOZN01	AS	02/17/2010	CHICAGO ZONE 01	IL	MW	03/01/2010
312-256-6XXX	6534	NEW CINGULAR WIRELESS PCS, LLC - IL	CHICGOZN01	AS	02/17/2010	CHICAGO ZONE 01	IL	MW	03/01/2010
312-256-7XXX	6534	NEW CINGULAR WIRELESS PCS, LLC - IL	CHICGOZN01	AS	02/17/2010	CHICAGO ZONE 01	IL	MW	03/01/2010
312-256-8XXX	460K	FIRST COMMUNICATIONS, LLC	CHICGOZN01	AS	01/02/2009	CHICAGO ZONE 01	IL	MW	01/31/2009
312-256-9XXX	7229	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	CHICGOZN01	RT		CHICAGO ZONE 01	IL	MW
312-256-XXXX	7229	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	CHICGOZN01	AS		CHICAGO ZONE 01	IL

Business/Government Phones on the 312-256 Prefix

Phone	Name	Address
312-256-5541	D'Light Boutique	2955 East 88th Street Chicago 60617 US

Reports

Anonymous User from Chicago, Illinois

September 13, 2025 at 8:45 PM

312-256-2385 reported as a Robocall. Received on September 13, 2025 at 11:55 AM.
Call for Warranties & protection plans

Anonymous User from Libertyville, Illinois

July 14, 2025 at 3:14 PM

312-256-8805 reported as a Live Voice or Other. Received on July 14, 2025 at 1:13 PM.

Anonymous User from Chicago, Illinois

June 30, 2025 at 11:42 AM

312-256-9627 reported as a Robocall. Received on June 30, 2025 at 9:09 AM.

Anonymous User from Patricks Afb, FL

May 24, 2025 at 4:01 PM

312-256-6214 reported as a Text Message. Received on May 24, 2025 at 11:21 AM.
Unwanted call for Other Services
Contacted via Internet (VOIP)

Anonymous User from , IL

April 15, 2025 at 9:56 PM

312-256-5550 reported as a Live Voice or Other. Received on April 15, 2025 at 8:45 PM.

Anonymous User from West Chicago, Illinois

March 26, 2025 at 4:11 PM

312-256-2810 reported as a Robocall. Received on March 26, 2025 at 3:04 PM.

Anonymous User from Memphis, TN

March 6, 2025 at 11:57 PM

reported as a Text Message. Received on March 6, 2025 at 12:05 AM.
Unwanted call for Other Services
Caller ID indicated they called from 312-256-1866
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , IL

February 3, 2025 at 12:51 PM

312-256-0255 reported as a Live Voice or Other. Received on February 3, 2025 at 9:53 PM.
Call for Energy, solar, & utilities

Anonymous User from Chicago, Illinois

May 5, 2023 at 5:52 PM

312-256-0471 reported as a Robocall. Received on May 5, 2023 at 10:23 AM.
Call for Reducing your debt (credit cards, mortgage, student loans)

Anonymous User from , IL

February 17, 2023 at 1:27 PM

312-256-7881 reported as a Live Voice or Other. Received on February 8, 2023 at 12:00 AM.

Anonymous User from Riva, MD

April 11, 2022 at 11:01 PM

None reported as a Text Message. Received on April 11, 2022 at 9:17 PM.
Unwanted call for Other Services
Caller ID indicated they called from 312-256-1882
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from Boca Raton, FL

April 5, 2022 at 7:36 AM

312-256-1882 reported as a Text Message. Received on April 5, 2022 at 9:30 PM.
Unwanted call for Other Services
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , IL

January 26, 2017 at 5:01 PM

None reported as a Prerecorded Voice. Received on January 26, 2017 at 12:00 AM.
Unwanted call for unknown
Caller ID indicated they called from 312-256-9980
Contacted via Wired

Most 'popular' numbers on this prefix:

312-256-0XXX: 312-256-0238 | 312-256-0247 | 312-256-0248 | 312-256-0250 | 312-256-0255 | 312-256-0258 | 312-256-0400 | 312-256-0402 | 312-256-0403 | 312-256-0470 | 312-256-0475 |
312-256-1XXX: 312-256-1800 | 312-256-1852 | 312-256-1880 | 312-256-1887 | 312-256-1888 |
312-256-2XXX: 312-256-2800 | 312-256-2888 | 312-256-2980 | 312-256-2983 | 312-256-2988 |
312-256-4XXX: 312-256-4300 | 312-256-4303 | 312-256-4308 |
312-256-5XXX: 312-256-5500 | 312-256-5550 | 312-256-5553 | 312-256-5555 |
312-256-6XXX: 312-256-6200 | 312-256-6210 | 312-256-6212 | 312-256-6217 | 312-256-6247 | 312-256-6258 | 312-256-6404 | 312-256-6407 | 312-256-6410 | 312-256-6411 | 312-256-6415 | 312-256-6452 |
312-256-7XXX: 312-256-7800 | 312-256-7880 | 312-256-7883 | 312-256-7887 | 312-256-7888 |
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