The most accurate way to verify a mobile number and its carrier designation is to ping the carriers’ network in real-time. However, this can be costly.
There are many databases for carrier lookup services available to differentiate mobile numbers from landlines at a small fee, but the accuracy is questionable. They are not a real-time lookup and carriers’ designation can be murky and confusing.
If you are sending a large number of text messages daily and segmenting carriers, you would want to use a reliable service with high accuracy to save you time and money. Here is a brilliant solution that can save a ton of money and still give you the accuracy of pinging carriers in real-time: Subscriber Verify
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