Systems and methods to identify ANI and caller ID manipulation for determining trustworthiness of incoming calling party and billing number information

A computer-implemented method, comprising:

• receiving from a calling party by a discrepancy detector a call request having a called telephone number, wherein the call request includes calling party information, wherein the discrepancy detector determines discrepancies in calling party information and is ancillary to an originating service provider network element that provides a telephone line for the calling party placing the call request;
• accessing a monitored called party number database, wherein accessing the monitored called party number database includes determining whether the call request to the called telephone number is to be verified, wherein the monitored called party number database includes telephone numbers;
• when the call request is to be verified, determining by the discrepancy detector whether a discrepancy exists between the calling party information contained within the call request and stored calling party information;
• and
• when a discrepancy exists between the calling party information contained within the call request and stored calling party information, causing call processing of a call requested in the call request to be suspended.