Do send me a PM if there's any other server I left out. All server I listed should be around 150 ping +-.

Stock mode servers
MY BOLEHVPN -HC SnD / 202.71.97.81:29860
MY BOLEHVPN -HC TDM / 202.71.97.81:28960
Narakka [Malaysia] / 202.71.97.208:28960
Narakka II / 202.71.97.209:28960

PromodLive servers
CN PromodLIVE Server / 202.71.97.209:28962
BVPN VitaNova ESP PromodLive / 202.71.97.81:29061
EvoX Gaming ProMod L!VE Server / 220.226.181.82:28961
[JPN] PromodLive TDM Server / 202.229.84.151:28961
Hg PromodLive Server / 202.71.97.209:29900
Kuku Gaming PromodLive / 202.71.97.81:29161
SWL Promod LiVe Server / 202.71.97.81:29470
FaTaL ToXiC 5 ProMoD Server by V-Street / 220.226.181.82:28960

*Your ISP could be the reason of you getting high ping on certain servers

If you want to get more friends or save these server into your favorite, I'd suggest you get xfire. You can get it from here. Download the file, install it, register a nick. Then go to favorite, right click, select add custom IP to favorites, and paste the IP. Make sure the game you selected is COD4 Multiplayer.
[attachmentid=1670206]

EDIT: The picture highlighted the wrong section. Should be the icon with two PCs, my mistake.