Assuming that 61.9.128.250 is between you and me, and between you and contribs here's what I've found.
From my IP in the UK I get:
X:\>tracert 61.9.128.250
Tracing route to 61.9.128.250 over a maximum of 30 hops
  1     6 ms     6 ms     6 ms  my.router [192.168.216.254]
  2    24 ms    41 ms    23 ms  gauss-dsl.zen.net.uk [62.3.82.18]
  3    26 ms    26 ms    25 ms  deleuze-ge-0-1-0-1.hq.zen.net.uk [62.3.80.161]
  4    28 ms    25 ms    25 ms  lotze-ge-0-0-0-0.hq.zen.net.uk [62.3.80.57]
  5    27 ms    25 ms    25 ms  bolzano-ge-0-0-3-0.wh.zen.net.uk [62.3.80.53]
  6    25 ms    25 ms    26 ms  195.16.169.89
  7    28 ms    25 ms    25 ms  so-10-0.hsa1.Manchesteruk1.Level3.net [4.68.113.97]
  8    84 ms    35 ms    49 ms  ae-1-0.bbr1.London2.Level3.net [212.187.128.46]
  9   107 ms   111 ms   104 ms  as-0-0.bbr2.Washington1.Level3.net [4.68.128.102]
 10   167 ms   169 ms   170 ms  as-1-0.bbr2.LosAngeles1.Level3.net [64.159.0.246]
 11   181 ms   168 ms   170 ms  4.68.102.104
 12   165 ms   166 ms   166 ms  reach-level3-oc12.LosAngeles1.Level3.net [4.68.127.238]
 13   167 ms   169 ms   166 ms  202.84.251.165
 14   316 ms   317 ms   331 ms  i-0_0.syd-core02.net.reach.com [202.84.144.102]
 15   337 ms   315 ms   320 ms  i-5-0.syd-core04.net.reach.com [202.84.144.250]
 16   316 ms   317 ms   317 ms  10GigabitEthernet5-0.oxf-core1.Sydney.telstra.net [203.50.13.33]
 17   319 ms   317 ms   317 ms  10GigabitEthernet13-0.chw-core2.Sydney.telstra.net [203.50.6.1]
 18   333 ms   333 ms   332 ms  Pos9-0.exi-core1.Melbourne.telstra.net [203.50.6.38]
 19   331 ms   330 ms   330 ms  GigabitEthernet2-7.exi1.Melbourne.telstra.net [203.50.77.14]
 20   333 ms   334 ms   333 ms  bpber001.lnk.telstra.net [139.130.0.14]
 21   332 ms   333 ms   331 ms  61.9.129.4
 22   329 ms   331 ms   329 ms  61.9.128.250
Trace complete.
X:\>tracert contribs.org
Tracing route to contribs.org [207.182.33.10]
over a maximum of 30 hops:
  1     7 ms     6 ms     6 ms  my.router [192.168.216.254]
  2    26 ms    27 ms    21 ms  gauss-dsl.zen.net.uk [62.3.82.18]
  3    23 ms    27 ms    24 ms  deleuze-ge-0-1-0-1.hq.zen.net.uk [62.3.80.161]
  4    34 ms    35 ms    35 ms  suarez-so-0-0-0-0.te.zen.net.uk [62.3.80.62]
  5    37 ms    34 ms    32 ms  ge1-1.fr1.lon.llnw.net [195.66.224.133]
  6    98 ms   101 ms    97 ms  e1-8.fr1.lga.llnw.net [69.28.172.125]
  7   103 ms   104 ms   101 ms  ge2-3.fr1.iad.llnw.net [69.28.172.217]
  8   139 ms   140 ms   140 ms  ge1-12.fr1.dal.llnw.net [69.28.172.213]
  9   174 ms   173 ms   176 ms  ge1-3-0-26.jr1.phx1.llnw.net [69.28.172.201]
 10   197 ms   196 ms   196 ms  login-gx-oc3.so2-2-2.jr1.phx1.llnw.net [69.28.139.246]
 11   199 ms   196 ms   199 ms  t2-0.tucson-enss1.t3.login.com [204.17.35.106]
 12   202 ms   203 ms   196 ms  core-gw.opus1.com [207.182.35.58]
 13   201 ms   202 ms   202 ms  dsl-gw3.opus1.com [204.27.149.14]
 14   205 ms   209 ms   209 ms  coleman-rstrat-t1.opus1.net [207.182.63.246]
 15   203 ms   202 ms   202 ms  
www.contribs.org.33.182.207.in-addr.arpa [207.182.33.10]
Trace complete.
Now, when I go to 
www.dnsstuff.com and use their tracert and ping utilities I can get to 
www.contribs.org - but I can't get to 61.9.128.250
++++++++++++++++
http://www.dnsstuff.com/tools/ping.ch?ip=61.9.128.250Ping to 61.9.128.250
Generated by 
www.DNSstuff.com at 10:22:28 GMT on 14 May 2005.
Pinging 61.9.128.250 [61.9.128.250]:
Ping #1: * [No response]
Ping #2: * [No response]
Ping #3: * [No response]
Ping #4: * [No response]
Done pinging 61.9.128.250!
(to do an IPv6 ping for a domain name, add a ':' before the domain name)
++++++++++++++++
http://www.dnsstuff.com/tools/tracert.ch?ip=61.9.128.250Tracert to 61.9.128.250
Generated by 
www.DNSstuff.com at 10:20:48 GMT on 14 May 2005.
Hop   Time 1   Time 2   Time 3   IP   Hostname   Return TTL   Country   Time
1   2 ms   1 ms   1 ms   206.196.11.254    [www.DNSstuff.com 1st hop]   64   United States   [Router did not respond]
2   2 ms   1 ms   1 ms   216.26.129.83    core-rtr01.ge-1-3-0.sdf.xodiax.net.   252   United States   [Router did not respond]
3   24 ms   905 ms   *   216.26.129.83    core-rtr01.ge-1-3-0.sdf.xodiax.net.   252   United States   [Router did not respond]
4   2 ms   302 ms   3 ms   216.26.128.225    edge-rtr02.ge-0-2-0.sdf.xodiax.net.   252   United States   Unix: 10:20:57.162
5   8 ms   903 ms   *   65.117.168.137    chi-edge-09.inet.qwest.net.   251   United States   [Router did not respond]
6   *   *   *                    
7   *   *   *                    
8   *   *   *                    
9   8 ms   603 ms   *   134.159.63.41    p1-1.chi-core01.net.reach.com.   248   Hong Kong   Unix: 10:21:11.298
10   305 ms   300 ms   55 ms   202.84.249.77    i-2-0.sjc-core01.net.reach.com.   247   Hong Kong   Unix: 10:21:14.446
11   215 ms   *   *   202.84.249.85    i-4-0.syd-core04.net.reach.com.   245   Hong Kong   Unix: 10:21:17.794
12   305 ms   302 ms   214 ms   203.50.13.33    10GigabitEthernet5-0.oxf-core1.Sydney.telstra.net.   244   Australia   Unix: 10:21:20.654
13   219 ms   *   *   203.50.6.1    10GigabitEthernet13-0.chw-core2.Sydney.telstra.net.   243   Australia   Unix: 10:21:24.137
14   *   *   *                    
15   *   *   *                    
16   *   *   *                    
17   *   *   *        
[4 hops with no response; assuming we hit a firewall that blocks pings]            
18                                
19                                
20                                
21                                
22                                
23                                
24                                
25                                
26                                
27                                
28                                
29                                
30                                
31                                
32                                
33                                
34                                
35                                
36                                
37                                
38                                
39                                
40                                
Done!
++++++++++++++++
http://www.dnsstuff.com/tools/tracert.ch?ip=contribs.orgTracert to contribs.org
Generated by 
www.DNSstuff.com at 10:19:33 GMT on 14 May 2005.
Hop   Time 1   Time 2   Time 3   IP   Hostname   Return TTL   Country   Time
1   1 ms   1 ms   0 ms   206.196.11.254    [www.DNSstuff.com 1st hop]   64   United States   [Router did not respond]
2   2 ms   899 ms   1 ms   216.26.129.83    core-rtr01.ge-1-3-0.sdf.xodiax.net.   252   United States   Unix: 10:19:37.243
3   1 ms   2 ms   299 ms   216.26.129.83    core-rtr01.ge-1-3-0.sdf.xodiax.net.   252   United States   [Router did not respond]
4   2 ms   1 ms   2 ms   216.26.128.225    edge-rtr02.ge-0-2-0.sdf.xodiax.net.   252   United States   [Router did not respond]
5   7 ms   901 ms   *   65.117.168.137    chi-edge-09.inet.qwest.net.   251   United States   Unix: 10:19:45.966
6   8 ms   902 ms   *   205.171.20.125    chi-core-03.inet.qwest.net.   250   United States   [Router did not respond]
7   58 ms   *   *   205.171.205.85    tmp-core-02.inet.qwest.net.   249   United States   Unix: 10:19:52. 1
8   301 ms   302 ms   54 ms   205.171.129.90    phv-edge-01.inet.qwest.net.   248   United States   Unix: 10:19:54.820
9   59 ms   *   *   65.121.93.134    unknown.qwest.net   247   United States   [Router did not respond]
10   61 ms   902 ms   *   204.17.35.106    t2-0.Tucson-enss1.t3.login.com.   247   United States   Unix: 10:20:00.407
11   61 ms   902 ms   *   207.182.35.58    Core-GW.Opus1.COM.   119   United States   [Router did not respond]
12   63 ms   902 ms   *   204.27.149.14    DSL-GW3.Opus1.COM.   245   United States   Unix: 10:20:06.427
13   71 ms   *   *   207.182.63.246    coleman-Rstrat-T1.Opus1.NET.   243   United States   Unknown: 82febe0d
14   *   *   *                    
15   *   *   *                    
16   *   *   *                    
17   70 ms   *   *   207.182.33.10    gpl.contribs.org.
[Reached Destination]   51   United States   [Router did not respond]
18                                
19                                
20                                
21                                
22                                
23                                
24                                
25                                
26                                
27                                
28                                
29                                
30                                
31                                
32                                
33                                
34                                
35                                
36                                
37                                
38                                
39                                
40                                
Done!
++++++++++++++++
So, my diagnosis is that there is a problem somewhere in Telstra. You need to get hold of a good engineer at Telstra who'll listen and who is interested in fixing this problem.
From the UK I arrive at  10GigabitEthernet13-0.chw-core2.Sydney.telstra.net and get correctly routed on, from the 
www.dnsstuff.com site I get to 10GigabitEthernet13-0.chw-core2.Sydney.telstra.net and get lost.
HTH - Good Luck!
David.