2026-02-03

Phone number released

Triggered when a phone number is removed from your account. The line was retired and is no longer in service. Stop sending from the line and update any routing that depends on it.

postWebhookphone_number.released.v2026-02-03

Payload

api_versionstring required

API version for the webhook payload format

webhook_versionstring required

Date-based webhook payload version. Determined by the ?version= query parameter in your webhook subscription URL. If no version parameter is specified, defaults based on subscription creation date.

event_type'message.sent' | 'message.received' | 'message.read' | 'message.delivered' | 'message.failed' | 'message.edited' | 'reaction.added' | 'reaction.removed' | 'poll.received' | 'poll.failed' | 'poll.sent' | 'poll.delivered' | 'poll.read' | 'poll.updated' | 'poll.vote.added' | 'poll.vote.removed' | 'poll.reaction.added' | 'participant.added' | 'participant.removed' | 'chat.created' | 'chat.group_name_updated' | 'chat.group_icon_updated' | 'chat.group_name_update_failed' | 'chat.group_icon_update_failed' | 'chat.background_updated' | 'chat.background_update_failed' | 'chat.typing_indicator.started' | 'chat.typing_indicator.stopped' | 'phone_number.status_updated' | 'phone_number.assigned' | 'phone_number.released' | 'contact_card.received' | 'call.initiated' | 'call.ringing' | 'call.answered' | 'call.ended' | 'call.failed' | 'call.declined' | 'call.no_answer' | 'location.sharing.started' | 'location.sharing.stopped' | 'payment.succeeded' | 'payment.canceled' | 'payment.expired' | 'payment.declined' | 'payment.authorized' | 'connection.created' | 'connection.revoked' | 'zero_day_retention.updated' | 'phone_number.forwarding_updated' | 'environment.line_moved' | 'contact_card.created' | 'contact_card.updated' | 'contact_card.deleted' | 'api_token.created' | 'api_token.renamed' | 'api_token.expiry_scheduled' | 'api_token.expired' | 'api_token.activated' | 'api_token.deleted' | 'environment.created' | 'environment.renamed' | 'environment.deleted' | 'webhook_subscription.created' | 'webhook_subscription.deleted' | 'webhook_subscription.target_url_changed' | 'webhook_subscription.enabled' | 'webhook_subscription.disabled' | 'webhook_subscription.events.updated' | 'webhook_subscription.phone_numbers.updated' | 'webhook_subscription.routing_headers_set' | 'webhook_subscription.routing_headers_cleared' | 'team_member.added' | 'team_member.signed_in' | 'team_member.signed_out' required

The type of event

event_idstring uuid required

Unique identifier for this event (for deduplication)

created_atstring date-time required

When the event was created

trace_idstring required

Trace ID for debugging and correlation across systems.

partner_idstring required

Partner identifier. Present on all webhooks for cross-referencing.

Example payload

{
  "api_version": "v3",
  "webhook_version": "2025-01-01",
  "event_type": "phone_number.released",
  "event_id": "550e8400-e29b-41d4-a716-446655440000",
  "created_at": "2025-11-23T17:30:00Z",
  "trace_id": "abc123def456",
  "partner_id": "partner_abc123",
  "data": {
    "phone_number": "+15551234567",
    "changed_at": "2026-09-01T21:17:12Z"
  }
}

Response

Webhook received successfully

Changes

Webhooks have no change history: a webhook is keyed by its event name rather than a path and method, so no recorded change can name it.