Area code 771: District of Columbia
Area code 771 is a US federal district area code for the District of Columbia, on Eastern Time. All 70 of its prefixes in service are in the Washington Zone 1 rate center. It shares its area with 202, so local numbers there can start with any of them. Local calls there take 10 digits.
Local time in area code 771
America/New_York
Prefixes in service
70 of 792 possible
1 rate center
Area code 771 facts
| Location | District of Columbia, United States |
|---|---|
| Time zone | Eastern Time |
| Overlays | 202 |
| Overlay of | 202 |
| In service since | November 9, 2021 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 771?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 771 rate centers with the most prefixes in service.
| Rate center | Prefixes |
|---|---|
| Washington Zone 1 | 70 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 771 number?
NANPA's dialling plan for 771: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 771 | 771-555-0147 |
|---|---|
| From another US or Canadian area code | 1-771-555-0147 |
| From outside North America | +1 771 555 0147 |
| E.164, for CRMs and SMS tools | +17715550147 |
When did area code 771 start?
Area code 771 went into service on November 9, 2021 as an overlay of 202. Today 771 and 202 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 771 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 771 number tells you where it was issued, not what it is now.
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Area code 771 questions
- What state is area code 771?
- Area code 771 is in the District of Columbia, United States. Its largest rate centers by number of prefixes are Washington Zone 1.
- What time zone is area code 771 in?
- Eastern Time.
- What area codes overlay 771?
- 202. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 771 start?
- Area code 771 went into service on November 9, 2021 as an overlay of 202.
- Is a 771 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 771 have?
- 70 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in District of Columbia
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.