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From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.javascript
Subject: Re: Does a mobile browser have access to the mobile's PHONE NO.??
Date: Sat, 29 Apr 2017 01:22:43 +0100
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"Evertjan." <exxjxw.hannivoort@inter.nl.net> writes:

> Ben Bacarisse <ben.usenet@bsb.me.uk> wrote on 28 Apr 2017 in 
> comp.lang.javascript:
>
>> "Evertjan." <exxjxw.hannivoort@inter.nl.net> writes:
>> 
>>> bit-naughty@hotmail.com wrote on 28 Apr 2017 in comp.lang.javascript:
>>>
>>>> ...can Firefox on a cellphone get to know the PHONE NUMBER of that
>>>> cellphone??? Is such a thing possible, or even Allowed?? Just occurred
>>>> to me.... 
>>>
>>> <a href="tel:0044201111111">0044201111111</a>
>> 
>> The group posted to and the phrase "get to know" suggests that
>> bit-naughty is looking for client-side code to discover a number, not
>> have a number explicitly presented in HTML.  What number is explained by
>> the phrase "of that cellphone".  (I don't know the answer so all I can
>> do is clarify the question.)
>> 
>> <snip>
>
> Perhaps I was a bit naughty, 
> but the response to that Q goes without saying,
> as,
> if clientside Javascript on a website 
> was able to get such info about the user,
> there would be no need for Edward Snowdon and Julian Assange,
> as all would have been revealed already.

I don't think that follows at all.  First, the request might need
explicit position (as is the case for geolocation data) and second, how
could an interface that exposes a person's telephone number (no matter
how insecurely written) reveal all that Snowdon did or anything close
to it.

-- 
Ben.