# Retell AI — SIP 486 Rejected on inbound calls

**URL:** <https://community.retellai.com/t/retell-ai-sip-486-rejected-on-inbound-calls/3687>\
**Category:** Support Help\
**Tags:** telephony\
**Created:** [September 25, 2026, 6:29pm UTC](https://community.retellai.com/t/retell-ai-sip-486-rejected-on-inbound-calls/3687 "2026-09-25T18:29:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![idoogroup](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/idoogroup/32/2779_2.png) [@idoogroup](https://community.retellai.com/u/idoogroup)\
**Post date:** [September 25, 2026, 6:29pm UTC](https://community.retellai.com/t/retell-ai-sip-486-rejected-on-inbound-calls/3687/1 "2026-09-25T18:29:14Z")

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We are seeing inbound calls to a phone number provisioned through Retell being rejected with the SIP `486 Rejected` response.

The number is correctly provisioned in our Retell account and associated with an agent, but inbound calls are being rejected by Retell before the call is established.

The SIP response we receive is:

```plaintext
SIP/2.0 486 Rejected

```

The rejection appears to be coming from Retell.

We have verified the phone number and agent configuration, but have not been able to identify what is causing Retell to reject the call.

If useful, I can provide an anonymized SIP trace and the corresponding timestamps privately.

---

<div class="post-metadata">

**Author:** ![Shah-Fazal](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/shah-fazal/32/2522_2.png) [@Shah-Fazal](https://community.retellai.com/u/Shah-Fazal)\
**Post date:** [September 25, 2026, 6:50pm UTC](https://community.retellai.com/t/retell-ai-sip-486-rejected-on-inbound-calls/3687/2 "2026-09-25T18:50:15Z")

</div>

Hello @idoogroup Could you please share the relevant Call IDs so we can look into this further?

Thank You