312-921

You are reviewing the Area Code (NPA/NXX) report for 312-921. Did you mean to search the SMS short code 312921?

Lookup Phone Number

Enter Phone Number: Lookup

🇺🇸 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	312921
Basic Format	312-921
NPA (Area Code)	312
NXX	921

Call Routing Data

NPA-NXX-X	OCN	Company	Rate Center	Use Type	Assign Date	City	State	Region	Block Effective Date
312-921-0XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-1XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-2XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-3XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-4XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-5XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-6XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-7XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-8XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-9XXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/22/2008	CHICAGO ZONE 1	IL	MW	09/01/2008
312-921-XXXX	9329	ILLINOIS BELL TEL CO	CHICGOZN01	AS	07/21/2008	CHICAGO ZONE 1	IL

---