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IPRN guide

What is IPRN? International Premium Rate Numbers explained

IPRN stands for International Premium Rate Numbers: phone numbers in international ranges where the party that holds the number receives a share of the money paid to terminate each call. This guide explains how IPRN works, how the revenue flows, what it is used for, where the fraud risks are, and what software you need to run IPRN properly.

IPRN in one minute

Every international call costs money to complete. The caller pays their own operator, that operator pays a transit carrier, and the transit carrier pays the operator in the destination country a termination rate for delivering the call. With International Premium Rate Numbers, part of that termination revenue is passed back down to whoever holds the number — usually per minute of answered call time.

National premium-rate numbers (such as 09 numbers in the UK or 900 numbers in the US) use special, clearly marked prefixes and are regulated inside one country. IPRN numbers are different: they sit inside international number ranges, often look like ordinary geographic or mobile numbers, and the revenue share is arranged between carriers and number providers rather than shown to the caller.

How an IPRN call works

1. A caller dials an international number that belongs to an IPRN range.
2. The originating operator routes the call to an international transit carrier.
3. The transit carrier delivers the call to the terminating operator in the destination country and pays the termination rate.
4. The terminating operator or IPRN provider sends the call to the platform of the range holder — for example an IPRN switch.
5. The IPRN platform answers the call and plays IVR audio, an information line, music or another service, and records the call detail (CDR).
6. Revenue flows back: the provider pays the range holder an agreed rate per minute for valid, answered traffic, usually weekly or monthly.

How IPRN revenue and payouts work

IPRN providers publish ranges — blocks of numbers in a country or on a specific network — each with a payout per minute. A few points decide how much is actually earned:

• Payout per minute differs by country, network and range, and can change when carriers change their rates.
• Billing increment — usually 60/60 (per started minute) or 1/1 (per second) — changes how short calls are paid.
• Payment terms: providers normally pay after they are paid by the carrier above them, so payouts are typically weekly or monthly, often with a delay.
• Traffic quality: providers check ACD (average call duration), ASR (answer rate) and CLI patterns. Traffic that looks abnormal or fraudulent is usually not paid.
• Test numbers let you check that a range is live and routed correctly before you send real traffic.

Because payouts are calculated from minutes, accurate CDRs are essential. If your own records do not match your provider's statement, you have no way to dispute a short payment.

Who is involved

What IPRN is used for

Premium-rate numbers exist so that a phone call itself can pay for a service. Legitimate uses include:

• Audiotext and entertainment lines (horoscopes, stories, music, games)
• Information and helplines charged per minute
• Live chat, dating and conversation lines
• Televoting, competitions and audience participation
• Paid conferencing and IVR-based services

IPRN fraud (IRSF) and how to avoid it

The same revenue-share model is abused in International Revenue Share Fraud (IRSF), one of the most common types of telecom fraud. Criminals generate calls to premium ranges using hacked PBX systems, stolen or cloned SIM cards, compromised SIP accounts or "Wangiri" missed-call scams that trick people into calling back. The victim — a business or a mobile subscriber — is left with the bill, carriers block the ranges, and payments are withheld down the chain.

A professional IPRN operation protects itself from fraudulent traffic, because fraud traffic is not paid and gets ranges and accounts shut down. Good practice (more in our IPRN fraud protection guide):

• Work only with reputable providers and only accept traffic from sources you know and trust.
• Use CLI controls — whitelists, blocklists and per-CLI limits — to stop repeated or suspicious callers.
• Set daily and weekly limits per range, number, agent, country and timezone so a sudden spike cannot run unchecked.
• Watch ACD, ASR and live calls in real time and get instant alerts on unusual patterns.
• Keep complete CDRs and rejected-call logs so every minute can be audited.

What software you need to run IPRN

Taking a range from a provider is only the start. To actually run IPRN you need a platform that can (see also IPRN switch vs IPRN panel):

• Answer calls — a switch or call engine with provider IP authentication.
• Play audio / IVR per range and control call duration.
• Manage providers, ranges, numbers and test numbers in one place.
• Run agents and resellers with their own logins, numbers and payout tiers.
• Control traffic with CLI rules and limits to keep it clean.
• Report and bill — CDR, provider and agent reports, margin, statements and balances.

IPRN glossary

Range

A block of IPRN numbers in a country or network, with one payout rate.

Payout

The amount paid to the range holder per minute of valid traffic.

Test number

A number from a range used to check routing and audio before live traffic.

ACD

Average call duration — how long answered calls last on average.

ASR

Answer-seizure ratio — the share of call attempts that are answered.

CLI

Caller line identification — the caller's number, used for limits and fraud checks.

CDR

Call detail record — one line of data per call, the basis for billing.

IRSF

International Revenue Share Fraud — artificially generated calls to premium ranges.

IPRN FAQ

Related guides: IPRN switch vs IPRN panel · IPRN reseller & agent system · IPRN fraud protection · IPRN test numbers · IPRN rates & payouts

Last updated: 22 October 2026 · IPRNVOICE