Mtr

http://www.bitwizard.nl/mtr/ Matt's TraceRoute

barney@adam:~$ mtr --report 1.2.3.4
HOST: adam                        Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 4.3.2.253                     0.0%    10    0.4   0.3   0.3   0.4   0.0
 2. break-primary--border-break.  0.0%    10    0.6   0.8   0.5   2.3   0.6
 3. bar-dc1--break-ge.space.net   0.0%    10    2.5   1.3   1.1   2.5   0.4
 4. dc-oak-core1--bar-dc1-10g.sp  0.0%    10    3.4   3.9   3.4   4.8   0.5
 5. dc-paix-px1--oak-core1-ge.sp  0.0%    10    4.5   4.4   4.3   4.8   0.2
 6. barnacles--paix-px1-ge.space  0.0%    10    4.6   6.3   4.6  10.8   2.2
 7. 10gigabitethernet1-2.core1.f  0.0%    10   17.8   8.3   5.3  17.8   4.6
 8. scarab-llc.10gigabitethernet  0.0%    10    6.4   6.0   5.2   8.1   1.0
 9. teleport.members.scarab.com  40.0%    10    6.1   6.1   5.6   6.2   0.3


barney@eve:~$ mtr --report 4.3.2.1
HOST: eve                        Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 184.105.143.85               10.0%    10    1.2   1.6   1.2   1.8   0.2
 2. 10gigabitethernet2-3.core1.f 10.0%    10    3.4   7.5   2.2  12.0   3.5
 3. 10gigabitethernet1-1.core1.p 60.0%    10    1.9   1.9   0.9   2.8   0.8
 4. paix-px1--barnacles-ge.space 40.0%    10    1.3   2.0   1.3   2.3   0.3
 5. dc-oak-core1--paix-px1-ge.sp 40.0%    10    4.1   4.2   3.6   4.6   0.4
 6. dc-bar-dc1--oak-core1-10g.sp 70.0%    10    5.2   5.4   5.2   5.7   0.2
 7. break-ge--bar-dc1.space.net  40.0%    10    6.1  10.6   5.3  34.4  11.6
 8. 4.3.249.229                  20.0%    10    6.6   7.1   5.9  10.6   1.6
 9. 4.3.2.1                      20.0%    10    7.4   6.4   5.0   7.9   0.9