Area Code Lookup

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397 IN-SERVICE CODES
DATA 07/30/2026

605

In-service U.S. numbering code

605 Area Code

South Dakota · Central / Mountain Time

Location
South Dakota
Time zone
Central / Mountain Time
In service since
01-Jan-1947
NANPA status
In service
Overlay codes
No active overlay complex listed
City references
No curated city reference is assigned on this site
Service type
Geographic
Source date
07/30/2026

What the 605 area code means

The 605 code is assigned in South Dakota. NANPA does not list an active overlay complex for this code. A number carrying this code is not proof of the caller’s current location.

Data source and limitations

The status fields above come from the NANPA NPA report dated 07/30/2026. City references are curated for navigation and do not replace exchange-level carrier data. Number portability also means a person can keep a number after moving.

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Last updated: July 23, 2026

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Information the tool uses

Lookup text is sent to this site only to return a result. The application does not ask for GPS access, contacts, a phone number owner, or a street address. Recent lookups are stored only in your browser using local storage and can be removed by clearing site data.

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Data accuracy

Area-code status, state or territory, overlay relationships, service type, and in-service dates are derived from the NANPA NPA database. An area code can cover many communities, and a city label is a practical lookup aid rather than proof that a specific number or caller is physically located there.

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The service is provided “as is.” Numbering plans change, and no result should be treated as emergency, legal, financial, identity, or fraud-verification advice.

Contact

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