# E14003 — NumberAvailabilityUnknown

We could not confirm whether this number is available. Please retry.

- **HTTP status**: `503`
- **Type**: `service_unavailable_error`
- **Name**: `NumberAvailabilityUnknown`

## What to do

This is temporary and not a decision about the number. Retry in a moment, or pick another number from the available list.

## Related

- [E14xxx — Numbers](/docs/api/errors/E14xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`