I need extract number from channel and community

Job ID: 37280281

Budget: ₹1,500 – ₹12,500 INR

hi friends,
I need extract contact number for whatsap channel and community where I am not admin.
need this web based.
some time I am member in channel/community and some time I am not in member in channel/community.
I need in both cases extract number.

Thanks. I need demo before award

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