USA Telephone Service
N11 Code Reference
| Code | Description | Availability |
| 211 |
Community Information and Referral Services |
Localized |
| 311 |
Non-Emergency Public Safety Services |
Localized |
| 411 |
Local Directory Assistance |
Service Provider Dependent |
| 511 |
Traffic and Transportation Information |
Localized |
| 611 |
Repair |
Service Provider Dependent |
| 711 |
Telecommunications Relay Service |
Nationwide |
| 811 |
One Call / Call Before You Dig |
Nationwide Pending 1Q07 |
| 911 |
Emergency |
Nationwide |
Updated: 10/15/2006