Company Codes (OCNs)

Company Code assignment

Company Codes are used to uniquely identify telecommunications service providers per industry standard ATIS-0300251, Codes for Identification of Service Providers for Information Exchange. NECA assigns all Company Codes.

Applications of Company Codes include, but are not limited to:

• NECA F.C.C. Tariff No. 4
• Assignment of OCNs in LERG™
• Access service requests 
• Multiple exchange carrier access billing 
• Small exchange carrier access billing 
• Exchange message interface 
• Exchange message record 

For instructions on ordering new Company Codes and a link to our Company Code request form, please see our Company Code request instructions.

To make an administrative change to an existing Company Code, please contact ccfees@neca.org

Combined entity company codes  

A CECC allows a merged entity to retain nonsurviving codes by using a reference to the record of the surviving or target legal entity company name in the Company Code database.

For more information about CECCs, please see the Combined Entity Company Code request form.

To learn more, please contact us.

Company Code directory

As maintenance agent for Company Codes, we make a full listing of all available codes in Excel format. This listing can be ordered on a subscription basis (monthly or quarterly) or on a one-time only basis. 

To order a Company Code directory, please complete the  Company Code directory order form and license agreement.

To learn more, please contact us.

ITU Carrier Code 

The International Telecommunication Union Carrier Code is a six character or less alphanumeric code, which is unique within a given country. ICCs identify network operators or service providers recognized by the national regulatory administration in a specific country. 

We maintain the US ICC list, a subset of the  Company Code directory. 

The ITU currently maintains a master list of worldwide ICCs. 

National administration: United States Department of State, Washington, D.C. 20520.

This site is provided by NECA.

Related links

Company Code request instructions and form

CECC request form

ILEC Company Code request form   

International Company Code request form    

International Company Code certification letter

Reference documents

North American Company Code procedures

North American Company Code glossary 

International Company Code procedures

International Company Code glossary