> For the complete documentation index, see [llms.txt](https://gsm.learn-telecom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gsm.learn-telecom.com/plmn-public-land-mobile-network/arfcns.md).

# ARFCNs

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An ARFCN (Absolute Radio Frequency Channel Number) is a unique identifier for a pair of physical radio carriers used in wireless communication.&#x20;

It helps in distinguishing different channels and aids in the effective allocation of frequency spectrum for mobile networks.&#x20;