456 NXX International Inbound Codes
This numbering resource is no longer administered in Canada. See status below.
456 NXX International Inbound Codes Description
The purpose of NPA 456 and its associated NXXs is to enable the routing of inbound international calls for carrier-specific services, particular to a service provider's network, to and between NANP Area countries. This is accomplished by providing carrier identification within the dialled digits of the E.164 number. More specifically, the prefix following 456 (456-NXX) identifies the carrier. Use of these numbers enables the proper routing of inbound international calls destined for these services.
456 NXX International Inbound Codes Assignment Guideline
456-NXX codes were assigned according to the Industry Numbering Committee (INC) International Inbound NPA Assignment Guideline, as accepted or modified by the Canadian Steering Committee on Numbering.
In 2017, the Industry Numbering Committee (INC) investigated the use of this resource in their networks and determined that there was no longer a need for the 456 NPA. INC agreed to sunset the ATIS-0300049, International Inbound NPA (INT/NPA/NXX) Assignment Guidelines and age the 456 NPA for five years before the NPA is returned to the general purpose code pool.
The Canadian Adjunct to International Inbound (INT/NPA/NXX) Reference Document can be obtained from the CRTC website by clicking here.
456 NXX International Inbound Codes Forms
Currently there are no 456-NXX assignments and no future assignments will be made.
456 NXX International Inbound Codes Status
Currently there are no 456-NXX assignments and no future assignments will be made.
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