I use my phone's internet sharing feature as a backup internet connection for emergencies (power outages) and occasionally at client sites.
For security purposes, some internet apps I work with need to know incoming IP addresses (in advance) before allowing internet connections.
I know how to determine the current IP address for my phone (during internet sharing). I know the block of IP addresses assigned to Verizon Wireless. I know the IP assigned to my phone during internet sharing varies (is not static) -- that was not a surprise.
But the range of IP addresses assigned to my phone (at various times) during internet sharing did surprise me. I did not change my physical location.
I want to configure my internet apps to accept connections from the narrowest possible range of IP addresses. I want to avoid opening up the entire block of IP addresses assigned to Verizon Wireless.
Is there a sub-range of Verizon Wireless IP addresses allocated by geographic region or city? Is there a way I can determine this sub-range without trial and error?
It is possible, perhaps likely, a detailed answer cannot be published, but I figure it doesn't hurt to ask.
Worst case, I will configure my apps to accept an uncomfortably wide range of Verizon Wireless IPs during emergency connections.
Thanks in advance to any respondents.
