CAIDA (skitter, macroscopic
)
NLANR (e.g. AMP active, PMA passive)
LBL (e.g. netest
SLAC/FNAL (e.g. PingER, IEPM-BW)
PSC (NIMI)
RICE (INCITE)
Europe: RIPE (Eu ISPs), PPMCG
NWS
Internet2 (PiPES, IETF/IPPM, Netflow)
Sprint, ATT Research
Commercial (Keynote, Matrix, internetweather
)