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International Mobile Subscriber Identity

International Mobile Subscriber Identity (IMSI)

An International Mobile Subscriber Identity (IMSI) is used in any mobile network that interconnects with other networks.  This unique, 15-digit international identifier, which is included in a mobile device, allows for roaming on mobile service provider networks.   

An IMSI includes three components:

  1. 1. Three-digit Mobile Country Code (MCC)
  2. 2. Three-digit Mobile Network Code (MNC)
  3. 3. Nine-digit Mobile Station Identification Number (MSIN).

The Home Network Identity (HNI) identifies a mobile subscriber’s home network and is assignable to mobile network operators with international roaming capabilities.  The HNI is comprised of the first six digits of the IMSI: the MCC and the MNC.  HNIs are administered by iconectiv, The MSIN is administered by the network operator to which the HNI is assigned. 

Code Requests and Changes

To apply, deploy, modify or return a code, download the appropriate form, fill it out and email it to iconectiv at Please note that that the processing time for an IMSI HNI application is up to 10 business days from receipt of the application, application fee and any required supporting documentation.

To view a list of current HNI assignments, click here: IMSI Assignments

More information can be found in the IMSI Assignment Guidelines and Procedures, which are maintained by the ATIS - IMSI Oversight Council (IOC).

Questions? View the FAQs or contact iconectiv at 732-699-3247.

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