While the MNI doesn't definitively reveal the MNO, some patterns might exist: Telstra: Often uses MNO indicators starting with 40, 41, or 42. Optus: Commonly uses MNO indicators starting with 45 or 48. Vodafone:Might use MNO indicators starting with 40, 41, or 42 (due to acquisitions). https://bcellphonelist.com/