What is Universal Call Blocking? - TekSavvy Community
<main> <article class="userContent"> <p>Universal Network-Level Call Blocking will block any incoming calls where the caller ID does not conform to established numbering plans, like the <a href="https://en.wikipedia.org/wiki/North_American_Numbering_Plan" rel="nofollow noreferrer ugc"><strong>North American Numbering Plan (NANP)</strong></a>.</p> </article> </main>