Prompt
sms api delivery failed error code meaning
Latest observation
“SMS API delivery failed” usually means the message was accepted by your API call but could not be delivered to the recipient’s phone. The exact error code meaning depends on the SMS provider.
Common reasons include:
- Invalid phone number format
- Unreachable or switched-off recipient phone
- Carrier/network issues
- Message content blocked by carrier filters
- Unverified sender ID or sender number
- Insufficient account balance or quota
- API authentication or permission problems
- Temporary provider outage
Common delivery failure codes often map to things like:
- Invalid number
- Unknown subscriber
- Message blocked
- Spam detected
- Network error
- Expired message
- Rejected by carrier
If you share:
- the SMS provider name (Twilio, AWS SNS, MessageBird, Vonage, etc.), and
- the exact error code/message,
I can tell you the specific meaning and how to fix it.
Observation history
How did Obsurfable measure this prompt?
Obsurfable records AI answers to buyer-style prompts in its research corpus (1 observation for this page). Metrics are distributions over observations, not a single static ranking.
Which AI systems does Obsurfable collect answers from?
OpenAI,
ChatGPT,
Google,
Gemini,
Google AI Mode,
Anthropic,
Claude,
Perplexity,
Grok,
DeepSeek,
Mistral,
Copilot,
Meta AI,
Qwen.
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