How do I differentiate between two countries with the same country code using libPhoneNumber-iOS?

I am using libPhoneNumber-iOS (https://github.com/iziz/libPhoneNumber-iOS) to parse international phone numbers, and I am having a bit of trouble differentiating between different countries with the same country code (e.g. USA and Canada both use +1). Does anyone know if this library does this?

Here is the code I'm using to retrieve the country code (region code i.e. "US"):

let fullPhoneNumber = "+15065552222"

guard let phoneUtil = NBPhoneNumberUtil.sharedInstance() else {
    return "error"
}

do {
    let phoneNumber = try phoneUtil.parse(fullPhoneNumber, defaultRegion: "ZZ")

    return phoneUtil.getRegionCode(forCountryCode: phoneNumber.countryCode)
    
} catch {
    return "error"
}

This code returns "US" for the country code, even though it is a Canadian number. Does anyone know what I can do to get the accurate country using this library?