| Clue | Source | Date |
|---|---|---|
| "What's your 20?" origin | ||
| Law enforcement lingo | Newsday | 23 Sep 2023 |
| Police radio lingo | Newsday | 02 Jul 2023 |
| CBers’ communication shorthand | Wall Street Journal | 12 Jul 2021 |
| CBer's lingo system | Premier Sunday | 27 Jun 2021 |
| Police radio lingo | ||
| Police radio lingo | ||
| Police Academy study | ||
| CBers' numerical system | ||
| CB numbers | ||
| System where "187" means "homicide" |