# Trace SMS delivery in Application Logs

[**Application Logs**](https://dashboard.clerk.com/~/application-logs) now record delivery events for SMS messages sent by Clerk, including phone verification codes, OTPs, and password reset codes. When a user reports a missing code, these events show whether the message was accepted, delivered, rejected, or left unconfirmed.

## The delivery lifecycle

Each message can generate several event types, helping you distinguish between a send failure, a delivery rejection, and an unknown outcome:

- `sms.accepted` — the delivery provider accepted the message (not yet proof it reached the phone)
- `sms.delivered` — the carrier confirmed delivery to the handset
- `sms.failed` — the send stopped before handoff, or the provider rejected it
- `sms.undeliverable` — the carrier could not deliver it after accepting it
- `sms.unconfirmed` — the provider reported an unknown delivery outcome

Failure events carry a normalized `reason` — like `invalid_phone_number`, `destination_unreachable`, or `rate_limited` — so a failure tells you whether to fix the number, wait out a provider limit, or adjust your own configuration. The message body, verification code, and provider identity are never included.

## Filtering and search

The dedicated [SMS logs view](https://dashboard.clerk.com/~/sms-logs) lists these events, where you can filter by a single event type like `sms.failed` or by the destination phone number to pull up one recipient's history. Every event for a single message shares a trace, so you can follow its whole timeline end to end.

## Get started

SMS events are available on all plans as part of Application Logs. Retention varies by plan. See the [pricing page](https://clerk.com/pricing) for details. Open the [**SMS logs view**](https://dashboard.clerk.com/~/sms-logs) to investigate SMS delivery, or [**Application Logs**](https://dashboard.clerk.com/~/application-logs) to view SMS events alongside other application events. Read the [documentation](https://clerk.com/docs/guides/dashboard/logs/sms-delivery-events.md) to learn more.

### Going forward

SMS delivery events build on Clerk's ongoing observability work alongside [Admin Logs](https://clerk.com/changelog/2026-08-25-admin-logs.md) and [Email Logs](https://clerk.com/changelog/2026-06-01-email-logs-public-beta.md).