Central Office Exchange (NXX)
+1 (979) 421-XXXX
Serving College-Station, Texas, United States • Carrier: Southwestern Bell
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Telecommunication Guide for Exchange 979-421
Under the North American Numbering Plan (NANP), a standard 10-digit telephone number is organized as NPA-NXX-XXXX:
- NPA (Numbering Plan Area):
979identifies the geographic region within Texas. - NXX (Central Office Exchange):
421identifies the local telephone exchange or switching office serving College-Station, Texas. - 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 (979) 421-XXXX |
| Mobile / Wireless Devices | Dial with international plus symbol | +1 979 421 XXXX |
| International Callers | Local exit code + 1 + Number | 00 1 979 421 XXXX |
Frequently Asked Questions
The registered service provider for this exchange is Southwestern Bell. 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: Texas
- City / Area: College-Station
- Area Code: 979
- Prefix (NXX): 421
- Carrier: Southwestern Bell
- Type: Landline
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Area Code 979
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