Phone Number Formatter
Format and validate phone numbers for international standards. Support for E.164, national, and local formats with comprehensive country-specific validation.
Phone Number Formatter
Single Number Formatter
Bulk Phone Numbers
Formatting Statistics
15
Total Numbers
9
Valid
6
Invalid
100%
Avg Confidence
4
Mobile Numbers
6 number(s) could not be formatted. Check for invalid formats or adjust validation settings.
Professional phone number formatting!
Format and validate phone numbers for international standards with comprehensive country support
Understanding International Phone Number Standards
International phone number formatting follows standardized protocols to ensure global compatibility and proper routing of telecommunications. The most important standard is E.164, which defines the international public telecommunication numbering plan.
Key Standards
- E.164: International standard format (+1234567890)
- ITU-T: International Telecommunication Union standards
- RFC 3966: URI scheme for telephone numbers
- NANP: North American Numbering Plan
- National formats: Country-specific formatting
- Local formats: Regional and carrier-specific
- Mobile vs landline: Different validation rules
- Emergency numbers: Special handling requirements
Format Components
- Country code: 1-3 digits identifying country
- Area/region code: Geographic or network identifier
- Subscriber number: Individual line identifier
- Extension: Internal routing within organizations
- Separators: Spaces, hyphens, parentheses
- Prefixes: International (+), national (0), local
- Special codes: Service numbers, premium rates
- Validation digits: Check digits for verification
E.164 International Format Standard
E.164 Format Structure
Format: +[Country Code][National Number]
Maximum length: 15 digits (including country code)
Prefix: Always starts with +
Country code: 1-3 digits
National number: Up to 14 digits
No separators: Continuous digit string
Examples
+1234567890 (US/Canada)
+442071234567 (UK)
+33123456789 (France)
+4915123456789 (Germany)
+81312345678 (Japan)
+8613812345678 (China)
Country Code Allocation
Zone 1 (North America)
+1 - US, Canada, Caribbean
Zone 2 (Africa)
+20 - Egypt
+27 - South Africa
+234 - Nigeria
+254 - Kenya
Zone 3-4 (Europe)
+33 - France
+39 - Italy
+44 - United Kingdom
+49 - Germany
Zone 5-6 (Americas)
+52 - Mexico
+54 - Argentina
+55 - Brazil
+56 - Chile
Zone 7-9 (Asia & Oceania)
Zone 7 (Russia & Kazakhstan)
+7 - Russia, Kazakhstan
Zone 8 (East Asia)
+81 - Japan
+82 - South Korea
+84 - Vietnam
+86 - China
Zone 9 (South Asia & Middle East)
+90 - Turkey
+91 - India
+92 - Pakistan
+93 - Afghanistan
Oceania
+61 - Australia
+64 - New Zealand
+679 - Fiji
+685 - Samoa
National and Regional Formatting Patterns
North American Numbering Plan (NANP)
Format Structure
Pattern: +1 NXX NXX XXXX
Area code: NXX (N = 2-9, X = 0-9)
Exchange: NXX (N = 2-9, X = 0-9)
Subscriber: XXXX (any digits)
Total digits: 10 (plus country code)
Common Formats
+1 234 567 8900 (International)
(234) 567-8900 (National)
234-567-8900 (Local)
234.567.8900 (Alternative)
2345678900 (Compact)
European Formats
United Kingdom
+44 20 7123 4567 (London)
+44 161 123 4567 (Manchester)
+44 7700 123456 (Mobile)
020 7123 4567 (National)
07700 123456 (Mobile national)
Germany
+49 30 12345678 (Berlin)
+49 151 12345678 (Mobile)
030 12345678 (National)
0151 12345678 (Mobile national)
France
+33 1 23 45 67 89 (Paris)
+33 6 12 34 56 78 (Mobile)
01 23 45 67 89 (National)
06 12 34 56 78 (Mobile national)
Asian Formats
Japan
+81 3 1234 5678 (Tokyo)
+81 90 1234 5678 (Mobile)
03-1234-5678 (National)
090-1234-5678 (Mobile national)
China
+86 10 1234 5678 (Beijing)
+86 138 1234 5678 (Mobile)
010 1234 5678 (National)
138 1234 5678 (Mobile national)
India
+91 11 1234 5678 (Delhi)
+91 98765 43210 (Mobile)
011 1234 5678 (National)
98765 43210 (Mobile national)
Validation Rules and Algorithms
Validation Steps
Basic Validation
- Remove all non-digit characters except +
- Check for valid international prefix (+)
- Validate total length (7-15 digits)
- Extract and validate country code
- Check national number length
- Validate area/region code format
- Verify subscriber number pattern
- Apply country-specific rules
Advanced Validation
- Mobile vs landline detection
- Geographic area validation
- Carrier code verification
- Service type identification
- Premium rate number detection
- Emergency number recognition
- Toll-free number validation
- Historical number plan changes
Common Validation Challenges
Format Ambiguity
Multiple valid representations
Missing or incorrect separators
Leading zeros handling
International prefix variations
Extension number placement
Regional Variations
Country-specific formatting
Mobile number patterns
Area code changes over time
New number plan implementations
Carrier-specific prefixes
Special Cases
Emergency numbers (911, 112)
Short codes (SMS, services)
Premium rate numbers
Satellite phone numbers
VoIP and virtual numbers
Professional Applications and Use Cases
📞
Telecommunications
Call routing, billing systems, number portability, and international gateway management
🏢
Business Systems
CRM integration, contact management, customer databases, and communication platforms
🔐
Authentication
Two-factor authentication, SMS verification, identity validation, and security systems
💳
Financial Services
Banking verification, payment processing, fraud detection, and compliance reporting
🚨
Emergency Services
Emergency dispatch, location services, caller identification, and public safety systems
📱
Mobile Applications
Contact apps, messaging platforms, social networks, and mobile commerce solutions
Implementation Best Practices
✅ Effective Formatting
- Always store numbers in E.164 format internally
- Display numbers in users preferred local format
- Implement comprehensive validation before storage
- Support multiple input formats for user convenience
- Provide real-time formatting feedback during input
- Handle country detection from user context
- Maintain up-to-date numbering plan databases
- Implement proper error handling and user feedback
❌ Common Mistakes
- Storing numbers in inconsistent formats
- Not handling international dialing prefixes properly
- Ignoring mobile vs landline distinctions
- Poor handling of extensions and special codes
- Not validating against current numbering plans
- Assuming all countries follow the same patterns
- Not considering number portability scenarios
- Inadequate testing with international numbers
Advanced Features and Integration
API Integration and Libraries
Popular Libraries
• libphonenumber: Googles comprehensive library
• PhoneNumberKit: Swift implementation
• phone: Python phone number library
• awesome-phonenumber: JavaScript wrapper
API Services
• Carrier lookup and validation services
• Number type identification APIs
• Real-time validation and formatting
• Bulk processing and verification
Advanced Validation Features
Carrier Information
Network operator identification
Mobile network code (MNC)
Mobile country code (MCC)
Roaming status detection
Geographic Data
Time zone information
Geographic coordinates
Administrative regions
Language preferences
Service Classification
Premium rate detection
Toll-free identification
Emergency number recognition
Short code classification