ANI Cardinality Ratio

ACR is the measure of uniqueness in the ANI values in a dataset. For example, if a customer made 1,000 call attempts and there were 1,000 unique ANIs then the ACR would be 100%.

Oftentimes, scammers will use a random number generator as the ANI in order to 1) get around ANI profiling, 2) save money and 3) avoid receiving call backs. Random number generators create a very high ACR. A high ACR value does not conclusively prove it is scam traffic but it is definitely something that should be investigated. If your scan reveals an ACR greater than 90% on any given account, signal IP or media IP then we recommend investigating the traffic source.