dfn
freefr
cznic
garr
optimate
kaz
kent
heanet
hivelocity
ignum
internode
iweb
jaist
netcologne
switch
nchc
ncu
skylink
tcpdiag
tenet
ufpr
waia
colocrossing
citylan
aarnet
superb-dca2
superb-dca3
softlayer-ams
softlayer-dal
