ClearIP can be used to create blacklist rules for specific calling or called Service Provider ID (SPID). In the United States, this value would map to the Operating Company Number (OCN).
The ClearIP SPID refers to the porting-corrected SPID or OCN. If the service provider ports in a new number, then the ClearIP SPID includes the service provider’s original numbers and the newly ported in number. ClearIP updates its NPAC data once every 24 hours.
Blacklist Called SPID
ClearIP can be used to blacklist calls to numbers owned by specific SPIDs to prevent toll fraud to high-risk domestic destinations. In this example, blacklist rules were created to block all calls going to LTE Wireless in New York with SPID 452J and calls going to Native American Telecom in South Dakota with SPID 870F.
The Called SPID for a specific Called Number can be viewed in the SIP Messages page under the Analytics menu. By clicking on the Columns button on right, you can search for the Called SPID column and click on it. The Called SPID column will show the porting-corrected SPID or OCN of every called number. This Called SPID value is what should be entered into the SPID blacklist rules. You can also enable the Called Company Name column to see the registered company name associated with the Called SPID. 
Blacklist Calling SPID
ClearIP can also be used to block the SPID of the calling number in the Whitelist/Blacklist Calling SPIDs page. If ClearIP processes both inbound and outbound calls, then this rule can be restricted to only apply to inbound calls if you select the appropriate Service Provider or Operator value.
If the service provider owns phone numbers that are registered with their SPID or OCN, then this rule can also prevent subscribers from receiving incoming calls from outside the network, where the calling number is spoofed to be one of your numbers.
You can view the Calling SPID field in the SIP Messages page for each calling number. This Calling SPID value must match any relevant Calling SPID blacklist. 