As expected, the one to WHO-15 received a response and WHO-IS did not. To simplify the test, don't include the "f", but go for the single line response. And it's only a callsign, but a true amateur radio callsign, that you send, not a full callsign-SSID. So just sent "VK3YPE" or "VK3PYE" and you should get something like:
07:09:47 New Chat Between KJ4ERJ and WHO-IS on 2020-11-22
But of course, we expect your only answer to come from WHO-15,
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and
On 11/22/2020 12:07 AM, Peter VK3PYE wrote:
I have sent off two APRS messages, one to each callsign. Here are the results ...