N11 Codes
N11 codes are used to provide three-digit dialing access to special services.
In the U.S., the FCC administers N11 codes. The FCC recognizes 211, 311, 511, 711, 811 and 911 as nationally assigned. The table below summarizes N11 assignments, reservations, and traditional usage.
In some states, N11 codes that are not assigned nationally may be assigned locally, provided that these local assignments can be withdrawn promptly if a national assignment is made.
There are no industry guidelines for the assignment of N11 codes.
| N11 CODE | DESCRIPTION |
| 211 | Community Information and Referral Services |
| 311 | Non-Emergency Police and Other Governmental Services |
| 411 | Local Directory Assistance |
| 511 | Traffic and Transportation Information (US); Provision of Weather and Traveller Information Services (Canada) |
| 611 | Repair Service |
| 711 | Telecommunications Relay Service (TRS) |
| 811 | Access to One Call Services to Protect Pipeline and Utilities from Excavation Damage (US); Non-Urgent Health Teletriage Services (Canada) |
| 911 | Emergency |
988
The FCC, in Order 20-100, designated 988 as the 3-digit abbreviated dialing code to access the national Suicide and Crisis Lifeline, and the requirement to transition to 10-digit dialing in the 82 area codes that currently permit 7-digit dialing and also use 988 as a Central Office code. The transition to 10-digit local dialing was completed in July, 2022.
Frequently Asked Questions (updated January 8, 2021)
Links to the FCC website:
- Numbering Resources (10-Digit Dialing Fact Sheet)
- Suicide Prevention Hotline (988 Fact Sheet and 10-Digit Dialing Fact Sheet)
- Fact Sheet: 988 Suicide Prevention Lifeline & 10-Digit Dialing
NPAs Required to Transition to 10-Digit Dialing
List of States and NPAs transitioning to 10-Digit Dialing
Progress of Transition
- Progress on 988 Milestones (updated July 7, 2021)
- Progress by State/Area Code (updated August 5, 2022)