Patent ID: 9357362
Filing Date: 2016-05-31
CPC Classification: H04L,H04W

Claim Text:
1. A method comprising: receiving, by a server, a short messaging service text message associated with an originating number and a terminating number; retrieving, by the server, electronic call records associated with the originating number; comparing, by the server, the electronic call records associated with the originating number to entries in an electronic list of grey phone numbers, each grey phone number in the electronic list of grey phone numbers associated with a device lacking a telephony capability to receive short messaging service text messages; determining, by the server, a match between the electronic call records and a grey phone number in the electronic list of grey phone numbers; determining, by the server in response to the match, the originating number has previously sent a previous text message to the grey phone number known to lack the telephony capability to receive the short messaging service text messages; and identifying, by the server, the originating number as a spammer based on the previous text message previously sent to the grey phone number known to lack the telephony capability to receive the short messaging service text messages.