Both work for me from my 44.92.21.X subnet.
Last login: Wed Sep 3 12:46:55 2014
root@ampr-gw:~# ping 44.135.49.2
PING 44.135.49.2 (44.135.49.2) 56(84) bytes of data.
64 bytes from 44.135.49.2: icmp_req=1 ttl=63 time=100 ms
64 bytes from 44.135.49.2: icmp_req=2 ttl=63 time=100 ms
^C
--- 44.135.49.2 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 100.335/100.639/100.944/0.439 ms
root@ampr-gw:~# ping 44.135.52.33
PING 44.135.52.33 (44.135.52.33) 56(84) bytes of data.
64 bytes from 44.135.52.33: icmp_req=1 ttl=30 time=51.1 ms
64 bytes from 44.135.52.33: icmp_req=2 ttl=30 time=54.3 ms
^C
--- 44.135.52.33 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 51.161/52.745/54.329/1.584 ms
root@ampr-gw:~#