That would alert him only if he logs on, which he hasn't done in nearly three months. Send him a private message, he should receive an email notification if he hasn't disabled that feature. To send a private message, hover over his avatar and click/tap "Start conversation" in the box that appears (or do so on his profile page). You
really shouldn't post your phone number or other personal information, you could provide it in a private message if you want someone (but not the whole world) to have it.
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