Just a random sampling: I can reach a Sprint and an MCI customer. I can also traceroute -g through Sprint and reach an MCI customer (sorry no DNS on the router, 144.228 is Sprintland and 204.70 is MCIland). Curtis traceroute to connix.com (198.69.10.2), 30 hops max, 40 byte packets 1 en-0.enss470.t3.ans.net (204.148.1.30) 2.253 ms 2.132 ms 2.049 ms 2 t0-0.cnss52.Hartford.t3.ans.net (192.103.65.9) 27.768 ms 27.648 ms 27.434 ms 3 mf-0.cnss48.Hartford.t3.ans.net (140.222.48.222) 27.838 ms 27.521 ms 27.54 ms 4 t3-2.cnss32.New-York.t3.ans.net (140.222.32.3) 30.855 ms 30.531 ms 30.334 ms 5 t3-1.cnss56.Washington-DC.t3.ans.net (140.222.56.2) 36.671 ms 35.944 ms 36.505 ms 6 t3-0.enss147.t3.ans.net (140.222.147.1) 37.055 ms 36.686 ms 36.238 ms 7 sl-mae-e-F0/0.sprintlink.net (192.41.177.241) 40.192 ms 63.829 ms 213.618 ms 8 sl-dc-8-H1/0-T3.sprintlink.net (144.228.10.41) 169.323 ms 56.15 ms 216.765 ms 9 sl-dc-6-F0/0.sprintlink.net (144.228.20.6) 226.158 ms 42.494 ms 42.574 ms 10 sl-pen-1-H2/0-T3.sprintlink.net (144.228.10.34) 39.521 ms 53.347 ms 51.931 ms 11 sl-pen-7-F0/0.sprintlink.net (144.228.60.7) 46.35 ms 128.988 ms 206.026 ms 12 sl-caravela-4-s0-T1.sprintlink.net (144.228.67.110) 204.428 ms 55.455 ms 50.509 ms 13 hfd-01.rt.connix.net (204.183.68.65) 57.627 ms 57.497 ms 61.205 ms 14 mfd-hfd.pp.connix.net (204.183.69.130) 54.592 ms 52.971 ms 54.21 ms 15 connix.com (198.69.10.2) 59.009 ms 70.912 ms 68.981 ms traceroute to ns.isi.edu (128.9.128.127), 30 hops max, 40 byte packets 1 en-0.enss470.t3.ans.net (204.148.1.30) 2.273 ms 2.15 ms 2.078 ms 2 t0-0.cnss52.Hartford.t3.ans.net (192.103.65.9) 27.731 ms 27.803 ms 27.686 ms 3 mf-0.cnss48.Hartford.t3.ans.net (140.222.48.222) 28.485 ms 27.492 ms 27.525 ms 4 t3-2.cnss43.Cleveland.t3.ans.net (140.222.43.3) 42.654 ms 42.49 ms 42.396 ms 5 t3-1.cnss27.Chicago.t3.ans.net (140.222.27.3) 50.043 ms 49.993 ms 49.974 ms 6 t3-1.cnss96.Denver.t3.ans.net (140.222.96.2) 74.795 ms 74.753 ms 74.692 ms 7 t3-1.cnss8.San-Francisco.t3.ans.net (140.222.8.2) 97.726 ms 98.407 ms 98.726 ms 8 t3-0.enss144.t3.ans.net (140.222.144.1) 100.66 ms 101.765 ms 101.544 ms 9 fix-west-cpe.SanFrancisco.mci.net (192.203.230.18) 101.413 ms 101.038 ms 103.37 ms 10 borderx2-hssi2-0.SanFrancisco.mci.net (204.70.158.117) 254.546 ms 265.445 ms 214.901 ms 11 core2-fddi-1.SanFrancisco.mci.net (204.70.158.65) 153.304 ms 103.416 ms 104.602 ms 12 core-hssi-2.Bloomington.mci.net (204.70.1.41) 114.067 ms 117.875 ms 115.73 ms 13 border1-fddi-0.Bloomington.mci.net (204.70.2.130) 119.707 ms 113.654 ms 114.491 ms 14 csunet-losnettos.Bloomington.mci.net (204.70.48.6) 121.376 ms 119.585 ms 119.236 ms 15 ISI-SWRL-GW.LN.NET (204.102.78.1) 117.668 ms 118.692 ms 117.416 ms 16 ln-gw.isi.edu (128.9.16.1) 121.521 ms 118.617 ms 119.793 ms 17 cisco2-32.isi.edu (128.9.32.2) 117.898 ms 120.588 ms 120.731 ms 18 darkstar.isi.edu (128.9.128.127) 117.897 ms 120.146 ms 120.439 ms traceroute to 128.9.128.127 (128.9.128.127), 30 hops max, 12 byte packets 1 cnss32-ft2.if (140.222.32.3) 6 ms 6 ms 5 ms 2 enss218-ft0.if (140.222.218.1) 11 ms 11 ms 10 ms 3 192.157.69.9 (192.157.69.9) 12 ms 14 ms 12 ms 4 144.228.60.1 (144.228.60.1) 18 ms 125 ms 119 ms 5 144.228.10.33 (144.228.10.33) 121 ms 112 ms 100 ms 6 144.228.20.8 (144.228.20.8) 77 ms 187 ms 19 ms 7 144.228.10.42 (144.228.10.42) 204 ms 170 ms 217 ms 8 192.41.177.181 (192.41.177.181) 222 ms 143 ms 97 ms 9 204.70.74.101 (204.70.74.101) 81 ms 52 ms 102 ms 10 204.70.74.49 (204.70.74.49) 97 ms 99 ms * 11 204.70.1.129 (204.70.1.129) 284 ms 379 ms 221 ms 12 204.70.1.125 (204.70.1.125) 254 ms * 56 ms 13 204.70.1.114 (204.70.1.114) 250 ms 219 ms 258 ms 14 204.70.1.122 (204.70.1.122) 246 ms 154 ms 235 ms 15 204.70.1.34 (204.70.1.34) 265 ms 555 ms 442 ms 16 204.70.2.130 (204.70.2.130) 137 ms 287 ms 280 ms 17 204.70.48.6 (204.70.48.6) 1179 ms 135 ms 239 ms 18 * 204.102.78.1 (204.102.78.1) 312 ms 178 ms 19 128.9.16.1 (128.9.16.1) 217 ms 170 ms 234 ms 20 128.9.32.2 (128.9.32.2) 216 ms 157 ms 321 ms 21 128.9.128.127 (128.9.128.127) 198 ms 365 ms 234 ms