I have been having issues talking to Greece on Skype lately through Vodafone. So I see that there is no immediate Vodafone problem, but did a tracert to ntua.gr and came out with this strange result...
2 17 ms 18 ms 17 ms be2-100.bras2ftc.akl.vf.net.nz [203.109.130.162]
3 17 ms 17 ms 16 ms be9-100.ppnzftc01.akl.vf.net.nz [203.109.130.161]
4 17 ms 17 ms 17 ms be7-188.ppnzftc02.akl.vf.net.nz.180.109.203.in-addr.arpa [203.109.180.226]
5 17 ms 16 ms 17 ms be8-188.ppnzftc02.akl.vf.net.nz.180.109.203.in-addr.arpa [203.109.180.225]
6 141 ms 141 ms 141 ms 10.123.231.2
7 141 ms 141 ms 141 ms ip-137.199.31.114.VOCUS.net.au [114.31.199.137]
8 142 ms 149 ms 150 ms 10gigabitethernet3-2.core1.sjc1.he.net [64.71.184.45]
9 151 ms 149 ms 149 ms 10gigabitethernet2-1.core1.sjc2.he.net [72.52.92.118]
10 142 ms 141 ms 141 ms sjo-bb1-link.telia.net [213.248.67.105]
11 142 ms 142 ms 143 ms level3-ic-157355-sjo-bb1.c.telia.net [213.248.98.30]
12 302 ms 302 ms 302 ms vlan90.csw4.SanJose1.Level3.net [4.69.152.254]
13 300 ms 300 ms 301 ms ae-91-91.ebr1.SanJose1.Level3.net [4.69.153.13]
14 302 ms 302 ms 303 ms ae-2-2.ebr2.NewYork1.Level3.net [4.69.135.186]
15 303 ms 300 ms 300 ms ae-82-82.csw3.NewYork1.Level3.net [4.69.148.42]
16 300 ms 300 ms 300 ms ae-81-81.ebr1.NewYork1.Level3.net [4.69.134.73]
17 302 ms 302 ms 302 ms ae-44-44.ebr2.London1.Level3.net [4.69.137.77]
18 300 ms 300 ms 300 ms ae-23-23.ebr2.Frankfurt1.Level3.net [4.69.148.194]
19 * * * Request timed out.
20 300 ms 301 ms 323 ms ae-63-63.ebr3.Frankfurt1.Level3.net [4.69.163.1]
21 300 ms 300 ms 300 ms ae-1-12.bar1.Vienna1.Level3.net [4.69.153.145]
22 300 ms 300 ms 301 ms 212.73.203.102
23 327 ms 302 ms 302 ms ae4.rt1.vie.at.geant.net [62.40.98.42]
24 337 ms 336 ms 346 ms as1.rt1.ath.gr.geant2.net [62.40.112.166]
25 336 ms 342 ms 336 ms grnet-gw.rt1.ath.gr.geant.net [62.40.124.90]
26 335 ms 335 ms 334 ms koletti1-to-eie2.backbone.grnet.gr [195.251.27.45]
27 * * 337 ms ntua-zogr-4.koletti-1.access-link.grnet.gr [194.177.209.118]
28 333 ms 333 ms 333 ms achilles.noc.ntua.gr [147.102.222.210]
It appears that the packets reach telia.net (hop 11) which is in France, and then go back to the states to get re-routed through Frankfurt...
Just wanted to ask the experts in here of how normal is this?