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Phone Number Country Lookup

All 92 countries supported by Pattern 50. Use the trigger phrase exactly as shown to generate the correct regex constraint automatically.

📞 How to use Pattern 50

  • Write as a Constraint paragraph above the question table
  • Format: Constraint: write a regex syntax for [Country] phone number format
  • Use either the adjective or noun trigger — both work
  • The constraint message is set automatically
  • Country not listed? You'll get a [REVIEW] flag to add it manually

🇫🇷 French trigger

  • Format: Constraint: écrire une syntaxe regex pour le format de numéro de téléphone [Pays]
  • Use the French adjective from the trigger column
  • The constraint message in French: Doit être au format de numéro de téléphone [Pays]
  • Works identically to the English trigger

🔢 Pattern 51 — Digit Length Constraint (standalone)

Use this on any text or integer question to restrict the number of digits allowed. Works independently — no phone regex needed.

Constraint: Allow only 11 digits → regex(., '^[0-9]{11}$')  |  Must be exactly 11 digits
Constraint: Allow only 10 to 13 digits → regex(., '^[0-9]{10,13}$')  |  Must be between 10 and 13 digits
French: Autoriser seulement 11 chiffres → regex(., '^[0-9]{11}$')  |  Must be exactly 11 digits
French: Autoriser seulement 10 à 13 chiffres → regex(., '^[0-9]{10,13}$')  |  Must be between 10 and 13 digits
Showing all 92 countries
Country Trigger words Regex constraint Constraint message
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