(...)
Some ISPs in Brazil include:
- Oi;
- Telefonica;
- Intelig (Telecom Italia group);
- CTBC;
- GVT;
- Embratel (Telmex group) - caveat: they don't peer!
- Global Crossing,
- et cetera.
Chances are that Oi, CTBC and GVT will not be present in Chile, though.
While evaluating your ISP, check the PTT-SP roster [1] to see if the ISP
has the tick mark on the column "ATM" (MLPA, in Portuguese) - for peering
purposes.
[1] - Biggest IXP in Brazil, http://sp.ptt.br/particip.html
Best regards,