German

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Etymology

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From durch (through) +‎ Wahl (dialling; part of a phone number, literally choice).

Noun

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Durchwahl f (genitive Durchwahl, plural Durchwahlen)

  1. (telecommunications) extension (digits added to a telephone number enabling one to reach a specific office or device)
    Da müssten Sie mal mit der zuständigen Kollegin sprechen. Das wäre die Durchwahl 28.
    For that you should talk to my colleague who’s responsible for the matter. That would be extension 28.

Declension

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