In several subnets in our organization ICMP request with PsPing is successful for every IPv4 address (even non-existent). For these addresses "usual" Ping returns "Destination net unreachable". Message Analyzer shows there's no Echo Reply received. Nevertheless PsPing returns OK.
The subnets are separated by routers that filter out addresses / ports that are not explicitly allowed.
Example (non-existent address):
Pinging 22.214.171.124 with 32 bytes of data:
5 iterations (warmup 1) ping test:
Reply from 126.96.36.199: 1.88 ms
Reply from 188.8.131.52: 1.57 ms
Reply from 184.108.40.206: 1.60 ms
Reply from 220.127.116.11: 1.77 ms
Reply from 18.104.22.168: 1.58 ms
Ping statistics for 22.214.171.124:
Sent = 4, Received = 4, Lost = 0 (0% lost)
Minimum = 1.57ms, Maximum = 1.77 ms, Average = 1.63 ms
There's another subnet where PsPing 126.96.36.199 returns "Request timed out" (that's correct). In this subnet Ping also returns "Request timed out".
Maybe PsPing works incorrect in situations where Ping returns "Destination net unreachable", but works correct when Ping returns "Request timed out"?