From Comcast Cable, at my home in Atlanta, I can ping 10.10.1.1.... which is pong'ed from a private client network hanging somewhere off of Insight Broadband's network in the North Central part of the US. Why on god's green earth do network operators allow such nonsense as this?
-Jim P. Traceroute -I 10.10.1.1 produces the following: traceroute to 10.10.1.1 (10.10.1.1), 30 hops max, 38 byte packets 1 10.238.10.1 (10.238.10.1) 29.089 ms 25.387 ms 28.574 ms 2 66.56.22.66 (66.56.22.66) 30.923 ms 31.305 ms 33.142 ms 3 66.56.22.70 (66.56.22.70) 35.945 ms 35.874 ms 36.832 ms 4 c-66-56-23-38.atl.client2.attbi.com (66.56.23.38) 34.740 ms 35.041 ms 37.537 ms 5 12.118.184.41 (12.118.184.41) 41.967 ms 45.584 ms 43.997 ms 6 gbr2-p70.attga.ip.att.net (12.123.21.6) 44.988 ms 44.706 ms 43.033 ms 7 tbr2-p013602.attga.ip.att.net (12.122.12.37) 49.353 ms 44.010 ms 45.244 ms 8 12.122.10.138 (12.122.10.138) 62.244 ms 62.269 ms 62.148 ms 9 gbr1-p40.sl9mo.ip.att.net (12.122.11.114) 60.922 ms 67.005 ms 60.264 ms 10 gar1-p360.sl9mo.ip.att.net (12.123.24.209) 59.572 ms 64.013 ms 60.198 ms 11 12-220-0-69.client.insightBB.com (12.220.0.69) 77.000 ms 76.050 ms 77.926 ms 12 12-220-7-198.client.insightBB.com (12.220.7.198) 95.437 ms 80.068 ms 84.076 ms 13 10.10.1.1 (10.10.1.1) 93.612 ms 97.280 ms 192.994 ms