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International Numbering Resources
Universal Numbers

A Universal International Freephone Number (UIFN) enables an International Freephone Service (IFS) customer to be allocated a unique freephone number(s) that is the same throughout the world.


The International Premium Rate Service (IPRS) enables an Information Service Provider (ISP) in a country to be assigned one or more Universal International Premium Rate Numbers (UIPRN), which allow IPRS callers to access information and other services provided by the ISP. For these calls, callers are charged at a premium rate. Detailed charging and accounting principles are defined in the D-Series Recommendations. In some cases, callers may need prior subscription to IPRS with the IPRS originating ROA and/or with the ISP.


An International Shared Cost Number (ISCN) is a unique number assigned to an ROA for its ISCS customer. This number can be dialed in several countries at a rate equivalent to the national call charge in the country of origin. All other service and call-related charges are paid by the ISCS customer.


The ITU International Network Designator ATM End System Address (ITU IND AESA) is defined by the ITU for use by service providers for the provision of ATM services. The ITU IND AESA enables companies, corporations and governmental institutions to implement an ATM addressing scheme for public ATM services that may or may not be offered accross international borders.

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Updated : 2010-01-21