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Phone custom fields allow you to store phone numbers in records with built-in validation and international formatting. They're ideal for tracking contact information, emergency contacts, or any phone-related data in your projects.

Basic Example

Create a simple phone field:

mutation CreatePhoneField {
  createCustomField(input: {
    name: "Contact Phone"
    type: PHONE
  }) {
    id
    name
    type
  }
}

Advanced Example

Create a phone field with description:

mutation CreateDetailedPhoneField {
  createCustomField(input: {
    name: "Emergency Contact"
    type: PHONE
    description: "Emergency contact number with country code"
  }) {
    id
    name
    type
    description
  }
}

Input Parameters

CreateCustomFieldInput

Parameter	Type	Required	Description
name	String!	✅ Yes	Display name of the phone field
type	CustomFieldType!	✅ Yes	Must be PHONE
description	String	No	Help text shown to users

Note: Custom fields are automatically associated with the project based on the user's current project context. No projectId parameter is required.

Setting Phone Values

To set or update a phone value on a record:

mutation SetPhoneValue {
  setTodoCustomField(input: {
    todoId: "todo_123"
    customFieldId: "field_456"
    text: "+1 234 567 8900"
  })
}

SetTodoCustomFieldInput Parameters

Parameter	Type	Required	Description
todoId	String!	✅ Yes	ID of the record to update
customFieldId	String!	✅ Yes	ID of the phone custom field
text	String	No	Phone number with country code
regionCode	String	No	Country code (automatically detected)

Note: While text is optional in the schema, a phone number is required for the field to be meaningful. When using setTodoCustomField, no validation is performed - you can store any text value and regionCode. The automatic detection only happens during record creation.

Creating Records with Phone Values

When creating a new record with phone values:

mutation CreateRecordWithPhone {
  createTodo(input: {
    title: "Call client"
    todoListId: "list_123"
    customFields: [{
      customFieldId: "phone_field_id"
      value: "+1-555-123-4567"
    }]
  }) {
    id
    title
    customFields {
      id
      customField {
        name
        type
      }
      text
      regionCode
    }
  }
}

Response Fields

TodoCustomField Response

Field	Type	Description
id	String!	Unique identifier for the field value
customField	CustomField!	The custom field definition
text	String	The formatted phone number (international format)
regionCode	String	The country code (e.g., "US", "GB", "CA")
todo	Todo!	The record this value belongs to
createdAt	DateTime!	When the value was created
updatedAt	DateTime!	When the value was last modified

Phone Number Validation

Important: Phone number validation and formatting only occurs when creating new records via createTodo. When updating existing phone values using setTodoCustomField, no validation is performed and the values are stored as provided.

Accepted Formats (During Record Creation)

Phone numbers must include a country code in one of these formats:

• E.164 format (preferred): +12345678900
• International format: +1 234 567 8900
• International with punctuation: +1 (234) 567-8900
• Country code with dashes: +1-234-567-8900

Note: National formats without country code (like (234) 567-8900) will be rejected during record creation.

Validation Rules (During Record Creation)

• Uses libphonenumber-js for parsing and validation
• Accepts various international phone number formats
• Automatically detects country from the number
• Formats number in international display format (e.g., +1 234 567 8900)
• Extracts and stores country code separately (e.g., US)

Valid Phone Examples

+12345678900           # E.164 format
+1 234 567 8900        # International format
+1 (234) 567-8900      # With parentheses
+1-234-567-8900        # With dashes
+44 20 7946 0958       # UK number
+33 1 42 86 83 26      # French number

Invalid Phone Examples

(234) 567-8900         # Missing country code
234-567-8900           # Missing country code
123                    # Too short
invalid-phone          # Not a number
+1 234                 # Incomplete number

Storage Format

When creating records with phone numbers:

• text: Stored in international format (e.g., +1 234 567 8900) after validation
• regionCode: Stored as ISO country code (e.g., US, GB, CA) automatically detected

When updating via setTodoCustomField:

• text: Stored exactly as provided (no formatting)
• regionCode: Stored exactly as provided (no validation)

Required Permissions

Action	Required Permission
Create phone field	OWNER or ADMIN role at project level
Update phone field	OWNER or ADMIN role at project level
Set phone value	Standard record edit permissions
View phone value	Standard record view permissions

Error Responses

Invalid Phone Format

{
  "errors": [{
    "message": "Invalid phone number format.",
    "extensions": {
      "code": "CUSTOM_FIELD_VALUE_PARSE_ERROR"
    }
  }]
}

Field Not Found

{
  "errors": [{
    "message": "Custom field not found",
    "extensions": {
      "code": "CUSTOM_FIELD_NOT_FOUND"
    }
  }]
}

Missing Country Code

{
  "errors": [{
    "message": "Invalid phone number format.",
    "extensions": {
      "code": "CUSTOM_FIELD_VALUE_PARSE_ERROR"
    }
  }]
}

Best Practices

Data Entry

• Always include country code in phone numbers
• Use E.164 format for consistency
• Validate numbers before storing for important operations
• Consider regional preferences for display formatting

Data Quality

• Store numbers in international format for global compatibility
• Use regionCode for country-specific features
• Validate phone numbers before critical operations (SMS, calls)
• Consider time zone implications for contact timing

International Considerations

• Country code is automatically detected and stored
• Numbers are formatted in international standard
• Regional display preferences can use regionCode
• Consider local dialing conventions when displaying

Common Use Cases

1. Contact Management

   • Client phone numbers
   • Vendor contact information
   • Team member phone numbers
   • Support contact details

2. Emergency Contacts

   • Emergency contact numbers
   • On-call contact information
   • Crisis response contacts
   • Escalation phone numbers

3. Customer Support

   • Customer phone numbers
   • Support callback numbers
   • Verification phone numbers
   • Follow-up contact numbers

4. Sales & Marketing

   • Lead phone numbers
   • Campaign contact lists
   • Partner contact information
   • Referral source phones

Integration Features

With Automations

• Trigger actions when phone fields are updated
• Send SMS notifications to stored phone numbers
• Create follow-up tasks based on phone changes
• Route calls based on phone number data

With Lookups

• Reference phone data from other records
• Aggregate phone lists from multiple sources
• Find records by phone number
• Cross-reference contact information

With Forms

• Automatic phone validation
• International format checking
• Country code detection
• Real-time format feedback

Limitations

• Requires country code for all numbers
• No built-in SMS or calling capabilities
• No phone number verification beyond format checking
• No storage of phone metadata (carrier, type, etc.)
• National format numbers without country code are rejected
• No automatic phone number formatting in UI beyond international standard

Related Resources

• Text Fields - For non-phone text data
• Email Fields - For email addresses
• URL Fields - For website addresses
• Custom Fields Overview - General concepts