Determine a Nigeria mobile phone Telecommunication Network with Regular Expressions

nigeria_networks.js

/**
 * Created by James Falade on 11/10/2018.
 */

var mtn = {
    pattern: /0(703|706|803|806|810|813|814|816|903|906)\d{7}/,
    name: 'MTN Nigeria'
};
var airtel = {
    pattern: /0(701|708|802|808|812|902|907)\d{7}/,
    name: 'Airtel Nigeria'
};
var _9mobile = {
    pattern: /0(809|817|818|908|909)\d{7}/,
    name: '9mobile'
};
var glo = {
    pattern: /0(705|805|807|811|815|905)\d{7}/,
    name: 'Globacom'
};
var multilinks = {
    pattern: /070(27\d{6})|9\d{7}/,
    name: 'Multi-Links'
};
var ntel = {
    pattern: /0804\d{7}/,
    name: 'Ntel'
};
var smile = {
    pattern: /0702[0-4]\d{6}/,
    name: 'Smile'
};
var starcomms = {
    pattern: /0(7028\d{6}|7029\d{6}|819\d{7})/,
    name: 'Starcomms'
};
var visafone = {
    pattern: /070(25\d{6}|26\d{6}|4\d{7})/,
    name: 'Visafone'
};
var zoomMobile = {
    pattern: /0707\d{7}/,
    name: 'ZoomMobile'
};
var networks = [mtn,airtel,_9mobile,glo,multilinks,ntel,smile,starcomms,visafone,zoomMobile];

var nigeriaMobileNumberValidator = {
    isNumberValid(mobileNumber){
        //TODO convert international number to local format.
        var network = this.getNetworkProvider(mobileNumber);
        return !!network;
    },
    getNetworkProvider(mobileNumber){
        for(var network of networks){
            if (network.pattern.test(mobileNumber)){
                return network.name;
            }
        }
        return null;
    }
};
if (global){
    global.nigeriaMobileNumberValidator = nigeriaMobileNumberValidator;
}else if(window){
    window.nigeriaMobileNumberValidator = nigeriaMobileNumberValidator;
}

console.log(nigeriaMobileNumberValidator.getNetworkProvider("08033333333"));
console.log(nigeriaMobileNumberValidator.isNumberValid("04155447755"));

Note that users can switch their network (sim swap) so always give the option to manually select the network