Is there anyone who has received a bill from ZAIN indicating he called Russia. I am shocked that my current bill reads I called Russia(Orange numbers 07700nnnnnn). The number was a local Orange number which has been charged as an international call. Who is the oversight to ensure consumers are not overcharged on local calls as international calls?

I did. And I called Zain to ask them about the calls to Russia. Their CS haven't responded to me to date and I have not paid my bill. I'm still wondering why Orange numbers are perceived to be calls to Russia and charged as Int'l calls.

Which body is regulating the allocation of number prefixes so that we are not charged international rates for a local call? Can CCK check?

It's CCK.