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International premium rate service (IPRS) refers to internationally available telephone-basedpremium services. It is analogous to "900" or "976" numbers inNorth America, which always incur a recipient-defined charge in excess of regular call charges. Internationally, this service has been allocatedcountry code +979. IPRS numbers are known as UIPRNs.
TheITU recommendation for IPRS defines four charge categories, across which the +979 numbering space is divided:
| Range | Charge band | Designation |
|---|---|---|
| +979 1 | 1 | "High" |
| +979 3 | 2 | "Medium" |
| +979 5 | 3 | "Low" |
| +979 9 | Special | "Special" |
UIPRNs are only available to premium service providers who will provide their service to more than one country.
The format of the numbers will be 979 a bcdefghi, where the a digit, 1, 3, 5 or 9, will indicate the charging band, and the remaining digits will be the IPRS subscriber's number. 1, 3 and 5 indicate charge bands 1, 2 and 3, respectively, while 9 will indicate a special charge band.
The service is not yet known to be active[citation needed]. Once it is activated, it may not be available from every country[citation needed], even though there is minimal or no cost to the receiving customer, as interchange rates would need to be negotiated for countries to allow origination of calls.
IPRS phone numbers are used by the German malware manufacturerFinFisher for their AndroidTrojans.[1]
