CALL SCREENING SERVICE FOR DETECTING FRAUDULENT INBOUND/OUTBOUND COMMUNICATIONS WITH SUBSCRIBER DEVICES

1 . A method, comprising:

determining whether to transmit to a mobile device that an inbound call has an elevated likelihood of being a scam call based on an inbound call origination source location;

creating a call block rule for a predefined period of time; and

blocking the inbound call to the mobile device.

2 . The method of claim 1 , comprising

determining whether the inbound call originated from a protected carrier network or an out-of-network carrier network comprises determining whether one or more call parameters identify an origination device address registered with the protected carrier network or with the out-of-network carrier network.

3 . The method of claim 2 , comprising

when the origination device address is registered at the out-of-network carrier network, determining whether the inbound call is assigned to a subscriber telephone number actively roaming in the out-of-network carrier network.

4 . The method of claim 3 , comprising

performing a lightweight directory access protocol (LDAP) query to identify whether the subscriber telephone number is actively roaming.

5 . The method of claim 4 , wherein when the subscriber telephone number is identified as not actively roaming, determining the inbound call has an elevated likelihood of being a scam call.

6 . The method of claim 1 , comprising

determining the inbound call intended for the mobile device is assigned an origination telephone number that is subscribed to a protected carrier network.

7 . The method of claim 1 , comprising

identifying the inbound call is intended for the mobile device based on a called number included in a call data message received with the inbound call.

8 . An apparatus, comprising:

a processor configured to

determine whether to transmit to a mobile device that an inbound call has an elevated likelihood of being a scam call based on an inbound call origination source location;

create a call block rule for a predefined period of time; and

block the inbound call to the mobile device.

9 . The apparatus of claim 8 , wherein the processor is further configured to perform

determine whether the inbound call originated from a protected carrier network or an out-of-network carrier network comprises determine whether one or more call parameters identify an origination device address registered with the protected carrier network or with the out-of-network carrier network.

10 . The apparatus of claim 9 , wherein when the origination device address is registered at the out-of-network carrier network, determine whether the inbound call is assigned to a subscriber telephone number actively roaming in the out-of-network carrier network.

11 . The apparatus of claim 10 , wherein the processor is further configured to perform a lightweight directory access protocol (LDAP) query to identify whether the subscriber telephone number is actively roaming.

12 . The apparatus of claim 11 , wherein when the subscriber telephone number is identified as not actively roaming, determine the inbound call has an elevated likelihood of being a scam call.

13 . The apparatus of claim 8 , wherein the processor is further configured to determine the inbound call intended for the mobile device is assigned an origination telephone number that is subscribed to a protected carrier network.

14 . The apparatus of claim 8 , wherein the processor is further configured to identify the inbound call is intended for the mobile device based on a called number included in a call data message received with the inbound call.

15 . A non-transitory computer readable storage medium configured to store instructions that when executed cause a processor to perform:

determining whether to transmit to a mobile device that an inbound call has an elevated likelihood of being a scam call based on an inbound call origination source location;

creating a call block rule for a predefined period of time; and

blocking the inbound call to the mobile device.

16 . The non-transitory computer readable storage medium of claim 15 , wherein the processor is further configured to perform:

determining whether the inbound call originated from a protected carrier network or an out-of-network carrier network comprises determining whether one or more call parameters identify an origination device address registered with the protected carrier network or with the out-of-network carrier network.

17 . The non-transitory computer readable storage medium of claim 16 , wherein the processor is further configured to perform:

when the origination device address is registered at the out-of-network carrier network, determining whether the inbound call is assigned to a subscriber telephone number actively roaming in the out-of-network carrier network.

18 . The non-transitory computer readable storage medium of claim 17 , wherein the processor is further configured to perform:

performing a lightweight directory access protocol (LDAP) query to identify whether the subscriber telephone number is actively roaming.

19 . The non-transitory computer readable storage medium of claim 18 , wherein when the subscriber telephone number is identified as not actively roaming, determining the inbound call has an elevated likelihood of being a scam call.

20 . The non-transitory computer readable storage medium of claim 15 , wherein the processor is further configured to perform:

determining the inbound call intended for the mobile device is assigned an origination telephone number that is subscribed to a protected carrier network.