"Do Not Call" Flags on Contacts

DNC

A contact record carries independent do-not-call signals. They are not interchangeable and are enforced at different points in the pipeline.

Blocked

The blocked flag is the company-wide blacklist flag described in the Blacklist vs Suppression List article.
It is set by user action or import and enforces a hard block for one company.

DNC Global

The Global DNC flag marks a contact as registered on the Federal Do Not Call registry or equivalent national DNC list. The flag is populated through DNC lookup integrations and consulted when any of several DNC-sensitive operations fire: inbound calls on offers with block-inbound-callers- on-DNC enabled, outbound dials from schedules with DNC checking enabled, scheduled callbacks, text messages on DNC-gated schedules, and lead suppression checks. The lookup result is cached for 5 minutes per number to avoid repeated lookups.

SMS Opt Out

Separately from DNC, a contact tracks SMS opt-out. When a consumer replies STOP to a message, the system records an opt-out log entry, sets the opt-out flag and timestamp, and then iterates every lead in the company sharing that number to keep the per-lead state in sync. A later opt-in (START) reverses the state through the same fan-out process.