for winXP/2k
執行cmd
然後tracert ...(你不能連的網站)

ex.
C:\Documents and Settings\David>tracert tw.yahoo.com

Tracing route to vip1.tw.tpe.yahoo.com [202.43.195.52]
over a maximum of 30 hops:

  1    14 ms     5 ms    68 ms  router1.m7.ntu.edu.tw [140.112.249.254]
  2     5 ms    23 ms     5 ms  ru250.cc.ntu.edu.tw [140.112.149.250]
  3    32 ms    10 ms    13 ms  140.112.1.113
  4     4 ms     5 ms    25 ms  140.112.1.38
  5    26 ms    14 ms     1 ms  tp-tanet-gw01.router.hinet.net [211.20.43.62]
  6     9 ms    15 ms     5 ms  tp-twix-r1.router.hinet.net [211.22.35.70]
  7    17 ms    29 ms    16 ms  tp-s2-c12r2.router.hinet.net [211.22.35.230]
  8        *        *        *