Central Office Exchange (NXX)
+1 (770) 551-XXXX
Serving Roswell, Georgia, United States • Carrier: Bellsouth Telecomm Inc DBA Southern Bell Tel & Tel
Jump to Any Number in this Exchange
Looking for a specific 4-digit line in the +1 (770) 551 block? Enter the last 4 digits below to inspect caller data and spam reports immediately:
Sample Active Numbers in this Prefix
Random representative sampling of telephone lines in the 1-770-551 block
Clicking any phone number displays its verified telecommunication profile, caller identification details, and community spam reviews.
SPONSORED
Telecommunication Guide for Exchange 770-551
Under the North American Numbering Plan (NANP), a standard 10-digit telephone number is organized as NPA-NXX-XXXX:
- NPA (Numbering Plan Area):
770identifies the geographic region within Georgia. - NXX (Central Office Exchange):
551identifies the local telephone exchange or switching office serving Roswell, Georgia. - 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 (770) 551-XXXX |
| Mobile / Wireless Devices | Dial with international plus symbol | +1 770 551 XXXX |
| International Callers | Local exit code + 1 + Number | 00 1 770 551 XXXX |
Frequently Asked Questions
The registered service provider for this exchange is Bellsouth Telecomm Inc DBA Southern Bell Tel & Tel. 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: Georgia
- City / Area: Roswell
- Area Code: 770
- Prefix (NXX): 551
- Carrier: Bellsouth Telecomm Inc DBA Southern Bell Tel & Tel
- Type: Landline
SPONSORED
Area Code 770
Explore other central office exchanges and municipalities covered by area code 770.
View All 770 Prefixes