README.md

Regex for Rwandans phone numbers

This is the regex for Rwandan phone numbers, which can be used for MTN, Tigo, or Airtel.

Usage

Use this regular expression to validate a mobile phone number input string in Rwanda in your code. The regular expression can be used in any programming language or text editor that supports regex.

Regular Expression

The regular expression is: /^\+?(25)?0(\s)?-?7(\d){2}(\s|-)?(\d){3}(\s|-)?(\d){3}$/g

Explanation

• /^: Denotes the start of the input string
• \+?: Matches an optional plus sign
• (250)?: Matches an optional country code (250) for Rwanda
• (\s)?: Matches an optional space character
• \-?: Matches an optional hyphen character
• 0?: Matches an optional leading zero
• 7(\d){8}: Matches the 9 digits of the mobile phone number (the first digit must be 7)
• $/g: Denotes the end of the input string and the global flag for finding multiple matches.

References

Here are some resources that were used to create and test this regular expression:

• Rwandan phone numbers - Wikipedia
• Regular Expressions - MDN Web Docs