John Smith

Notes

John Smith is a Software Engineer in the Technology industry with 3+ years of experience. Key expertise in Leadership, Leadership. Speaks English (Native).

Senior professional with expertise in Leadership. Collaborative team player. Available for international projects

Country Phone Information

Understanding USA Phone Numbers: Structure, Formatting, and Key Details

Phone numbers in the United States follow the North American Numbering Plan (NANP), a system shared with Canada, parts of the Caribbean, and other U.S. territories. Each U.S. phone number consists of 10 digits, structured under a standardized format for consistency and ease of use.

Basic Structure

• Country Code: The U.S. country code is +1, which must be dialed when calling from abroad.
• Area Code: A 3-digit geographic identifier (e.g., 212 for New York, 310 for Los Angeles). Originally tied to specific regions, area codes now often overlap due to increased demand.
• Local Number: A 7-digit combination, split into:
  • Exchange Code (3 digits): Identifies the telephone exchange.
  • Subscriber Number (4 digits): The unique line identifier.

Common Formats

Domestic:

• (555) 123-4567 (standard)
• 555-123-4567 (alternative)
• 1-555-123-4567 (long-distance)

International:

• +1 555 123 4567 (with spaces)
• +15551234567 (no separators)

Special Number Types

• Toll-Free Numbers: Start with 800, 888, 877, 866, 855, 844, or 833 (e.g., 1-800-HELP-NOW).
• Premium Services: Numbers beginning with 900 charge extra fees.
• Emergency & Short Codes:
  • 911 (nationwide emergency line)
  • 311 (non-emergency services)
  • 511 (traffic/travel info, varies by state)

Dialing Rules

• Local Calls: Most areas require 10-digit dialing, even within the same area code.
• International Calls:
  • To the U.S.: Dial [International Access Code] + 1 + Area Code + Number (e.g., 00 1 212 555 1234 from Europe).
  • From the U.S.: Dial 011 + [Country Code] + [Number].

Mobile vs. Landline

Unlike some countries, U.S. phone numbers do not indicate whether they belong to a mobile or landline. Thanks to number portability, users can keep their numbers when switching carriers or moving.

Scams & Security

Fake caller IDs and spoofed numbers are common in scams. Always verify unknown callers, especially if they claim to be from government agencies or financial institutions.