appelé, appelant

  • It really depends on context, but you could certainly say 'the number (being) called' and 'the number of the caller' respectively.

    'Called/calling number' could work, but I'm not sure the meaning of either would be readily apparent unless the terms were situated in a particular context which makes it clear.
    Well it is rather a technical text... a user manual for engineers, I think it doesn't have to be elegant, but precise...called/calling number work fine.
    Merci infinimment!
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