Central Office Exchange (NXX)
+1 (605) 641-XXXX
Serving South Dakota, United States • Carrier: New Cingular Wireless PCS - IL
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Sample Active Numbers in this Prefix
Random representative sampling of telephone lines in the 1-605-641 block
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Telecommunication Guide for Exchange 605-641
Under the North American Numbering Plan (NANP), a standard 10-digit telephone number is organized as NPA-NXX-XXXX:
- NPA (Numbering Plan Area):
605identifies the geographic region within South Dakota. - NXX (Central Office Exchange):
641identifies the local telephone exchange or switching office serving South Dakota. - XXXX (Subscriber Line Number): 10,000 distinct telephone lines (ranging from
0000to9999) are routed through this exchange.
How to Correctly Dial Numbers in this Prefix:
| Call Origin | Dialing Instructions | Example |
|---|---|---|
| Local or Domestic (US/Canada) | Dial 1 + 10-Digit Number | 1 (605) 641-XXXX |
| Mobile / Wireless Devices | Dial with international plus symbol | +1 605 641 XXXX |
| International Callers | Local exit code + 1 + Number | 00 1 605 641 XXXX |
Frequently Asked Questions
The registered service provider for this exchange is New Cingular Wireless PCS - IL. Note that individual line numbers may have been transferred to other providers via Local Number Portability (LNP).
Calls from this prefix could originate from local businesses, hospitals, friends, or automated dialers. If you received an unsolicited call from an unknown party in this exchange, enter the full 4 digits in our search box above to check for community scam or telemarketer reports.
Exchange Information
- Country: Unites States (+1)
- State: South Dakota
- City / Area: South Dakota
- Area Code: 605
- Prefix (NXX): 641
- Carrier: New Cingular Wireless PCS - IL
- Type: Wireless
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Area Code 605
Explore other central office exchanges and municipalities covered by area code 605.
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