---
title: What does DEFERRED (No Ack From SMSC) mean?
description: "Your message did not receive an **acknowledgment from the SMSC** (Short Message Service Center) within the expected time - for example the gateway did not confirm accept/reject. The message is in a deferred or uncertain state. **What you can do:** Check your Delivery…"
url: "https://www.smsgatewaycenter.com/blog/kb/what-does-deferred-no-ack-from-smsc-mean/"
updated: "2026-05-14"
category: "Bulk SMS / Errors & Error Codes"
---

# What does DEFERRED (No Ack From SMSC) mean?

Your message did not receive an **acknowledgment from the SMSC** (Short Message Service Center) within the expected time - for example the gateway did not confirm accept/reject. The message is in a deferred or uncertain state.

**What you can do:** Check your Delivery Report again later; the message may later get a final status. If DEFERRED appears often for a route, contact support.

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