List of prefixes used by telephone companies?

[Clair]

Hi

Does anyone know where I can find a list of the prefixes used by various tel operators?

I have recently moved back to FT but I would still like the option of dialling through Budget Telecom.

For instance, to use Tele2, I dial 4 instead of 0 and the call goes through my Tele2 account instead of my FT account.

To use TéléRabais, I dial 0811 310310 and the call goes at local cost through my primary operator (FT)

I cannot find Budget Telecom's prefix on their website and they're not replying to my email... Does anyone use them and know their  prefix?

Thanks in advance

[Cjlaws]

It's 0811 654 111