ContextAbbreviation · Ages 11-18 · Dated
9
9 or CD9 ("code 9") means a parent is watching. 99 means the parent has left.
For parents and educators
Mostly a relic. Like PIR, it signals a wish for privacy rather than danger. Focus on who your child talks to rather than decoding numbers.
Where it came from
Old texting code that still appears in parent guides.
Also heard as
CD9, 99
Sources