With the rate at which the mobile market is currently, you would agree with me that the confusion to know which mobile network owns a particular prefix in a phone number would really grow.
MTNMTN is the major service provider in Nigeria and they cover a whole lot of number prefixes. Here is a list covered by the MTN network.
GLOGlo is the next on my list and here are the numbers they cover.
AIRTELAirtel, an Indian telecom company has the following number prefixes in their control.
ETISALATEtisalat network covers the following numbers below.