Facebook does not send verification

I have been creating facebook accounts through VPN in different countries for the last days. I am using a specific provider from my country and now the sms are not coming. I wonder if Facebook blocks a provider if too many accounts are created its extension eg if all the accounts start with 8312**** it doesnt send verification passwords in them ...

If anyone had a similar experience please respond!
Thanks!

If I recall correct (please correct me if I am wrong). Here is the amount of number accounts can be validated per phone number.

Google: up to 7
CraigsList: Up to 2
FaceBook: 1
PayPal: 1

If any one has different numbers please share.

Now I don't think they will stop sending SMS because it begins with the same prefix, now your provider might have a throttle control to avoid spamming.

*Moved to Facebook section*