compliance
Reassigned Number Database (RND)
A US lookup tool that tells callers whether a phone number has been given to a new owner since a date, so you do not keep calling someone who never consented.
The Reassigned Number Database, or RND, is a US lookup service that tells you whether a phone number has been disconnected and handed to a new person since a date you choose. Phone numbers get recycled constantly. The customer who signed up two years ago may have long since given up that number, and a complete stranger now answers it. The RND lets you find out before you dial.
Why it matters: you can hold valid Express written consent from the original owner and still break the rules by calling the new one, because that new person never agreed to anything. Consent does not travel with the phone number. The RND exists so you can scrub your Lead list before a campaign and drop any number that has changed hands since the day you collected consent for it, which is the date you feed into the check.
Checking the RND is one of the steps that earns you a defense under the TCPA if you accidentally reach a reassigned number despite a clean check. That defense only stands if you actually queried the database, so keep proof of each lookup. It is separate from a DNC (do not call) scrub, which removes people who asked you to stop. The RND is about ownership; the DNC is about consent being withdrawn. Mobile traffic carries the most exposure, so pair an RND check with the Cellphone calling rule firmly in mind whenever you load cell numbers.
The database is run under the FCC. In VICIdial you would scrub against it outside the dialer, usually as part of your list-loading workflow, then import only the clean numbers so the dialer never sees a reassigned one. This is a practical summary, not legal advice. Build the RND check into your routine the same way you build in DNC scrubbing, and confirm the details with someone who knows your specific campaign type.
Related terms
Cellphone calling rule
The cellphone calling rule requires prior consent before an autodialer or prerecorded message reaches a mobile number, separate from the rules for landlines.
DNC (do not call)
DNC (do not call) is a list of numbers VICIdial must never dial — people who opted out or are legally off-limits — checked before every outbound call.
Express written consent
A signed, clear agreement from a person that you may call or text them with automated or recorded marketing, naming your company and the number you'll use.
FCC
The FCC is the US agency that regulates phone networks and writes many TCPA rules, including consent, robocall, and caller-ID requirements that dialers must follow.
Lead list
A named collection of leads that campaigns dial from, identified by a list ID and assigned to one or more campaigns.
TCPA
The TCPA is a US law restricting automated calls and texts, requiring consent before dialing cell phones with autodialers and limiting when and how often you may call.