Me autorespondo. he encontrado esto:
OPS - Australia (YES OPTUS)
VAU - Australia (Vodafone) BRANDED
XSA - Australia (Telstra, YES OPTUS, Vodafone AU, Virgin Mobile, 3, Crazy Johns)
HUT - Australia (3) BRANDED
ATO - Austria
SEB - Baltic (LMT GSM, LV TELE2, LV BITE, LT Omnitel, LT Bite, LT TELE2, EE EMT, EE ELISA, EE TELE2)
ETR - Bangladesh
TML - Bangladesh (TML and ETR seem equal, same version, same network operators)
PRO - Belgium
VVT - Bulgaria (vivacom)
MTL - Bulgaria (MTEL)
BMC - Canada (Bell)
BWA - Canada (SaskTel)
BMF - Canada (Fido) UNBRANDED [provided by Idan73, not checked by me]
XEZ - Czech Republic
VIP - Croatia (HR VIP)
SFR - France (F SFR, SFR RU) BRANDED
XEF - France
DBT - Germany
CYO - Greece (MTN, CYTAVODA)
EUR - Greece (WIND GR, vodafone GR, COSMOTE)
TGY - Hong Kong [provided by rickylcp, not checked by me]
INS - India (CSCEdition > ED006)
INU - India (CSCEdition > ED009 | I think INU is an updated version of INS, as they seem to have the same network operators)
XSE - Indonesia
MET - Ireland (Meteor)
ITV - Italy [UPDATED 02/11]
XME - Malaysia
NPL - Nepal
XEE - Nordic (Denmark, Finland, Iceland, Norway, Sweden)
XTC - Philippines
XEO - Poland (Plus, Era, Heyah, Orange, Play)
ERA - Poland (ERA) BRANDED
TPH - Portugal
CNX - Romania (Vodafone RO)
COA - Romania (Cosmote)
ORO - Romania (RO Orange)
HAT - Romania (RO Orange, Vodafone RO, Cosmote)
SER - Russia (MTS, Beeline, Megafon, TELE2)
TOP - Serbia
XSP - Singapore
XSP - Singapore UNBRANDED
XSO - Singapore (Singtel)
MOT - Slovenia (Mobitel)
SIM - Slovenia (Si.mobil)
XEC - Spain (Movistar) BRANDED
FOP - Spain (Movistar, Vodafone ES, Orange, Yoigo, Mobil R, EUSKALTEL, TeleCable, Blau, Simyo)
SLK - Sri Lanka
AUT - Switzerland (Sunrise, Swisscom, Orange CH)
MOZ - Switzerland (Sunrise, Swisscom, Orange CH)
SWC - Switzerland (Swisscom) BRANDED
CPW - United Kingdom & Ireland
XEU - United Kingdom & Ireland
http://forum.xda-developers.com/showthread.php?t=787163