Central Office Exchange (NXX)

+1 (443) 704-XXXX

Serving Baltimore, Maryland, Unites States • Carrier: Cavalier Telephone Mid-atlantic

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Looking for a specific 4-digit line in the +1 (443) 704 block? Enter the last 4 digits below to inspect caller data and spam reports immediately:

+1 (443) 704 -

Sample Active Numbers in this Prefix

Random representative sampling of telephone lines in the 1-443-704 block

443-704 0049
443-704 0118
443-704 0204
443-704 0227
443-704 0726
443-704 1832
443-704 1920
443-704 1948
443-704 2039
443-704 2430
443-704 2821
443-704 3039
443-704 3220
443-704 3331
443-704 3813
443-704 3864
443-704 4253
443-704 4311
443-704 4448
443-704 4806
443-704 5325
443-704 5523
443-704 5792
443-704 5925
443-704 6106
443-704 6277
443-704 6694
443-704 6906
443-704 7319
443-704 7623
443-704 7664
443-704 7749
443-704 8435
443-704 8675
443-704 9010
443-704 9447
443-704 9552
443-704 9739
443-704 9761
443-704 9882

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Telecommunication Guide for Exchange 443-704

Under the North American Numbering Plan (NANP), a standard 10-digit telephone number is organized as NPA-NXX-XXXX:

  • NPA (Numbering Plan Area): 443 identifies the geographic region within Maryland.
  • NXX (Central Office Exchange): 704 identifies the local telephone exchange or switching office serving Baltimore, Maryland.
  • XXXX (Subscriber Line Number): 10,000 distinct telephone lines (ranging from 0000 to 9999) 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 (443) 704-XXXX
Mobile / Wireless Devices Dial with international plus symbol +1 443 704 XXXX
International Callers Local exit code + 1 + Number 00 1 443 704 XXXX

Frequently Asked Questions

The registered service provider for this exchange is Cavalier Telephone Mid-atlantic. 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: Maryland
  • City / Area: Baltimore
  • Area Code: 443
  • Prefix (NXX): 704
  • Carrier: Cavalier Telephone Mid-atlantic
  • Type: Landline
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Area Code 443

Explore other central office exchanges and municipalities covered by area code 443.

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