Hi, I had a call go unanswered and said number not in service. Then I recalled and no issue. Call ID:

4f6a968c-9f17-4e20-8431-d0dd06c04495

What caused this?

Hi there! 👋 I don't have access to the specific logs for your Call ID

4f6a968c-9f17-4e20-8431-d0dd06c04495

, so I can't tell you exactly what caused that particular "number not in service" error. However, I can definitely help explain some common temporary issues that might cause this problem and how you can investigate further. Since your call worked on the second attempt, this was likely a temporary issue. According to our documentation, there are several potential temporary causes for a "number not in service" message: 1. Network connectivity issues - Temporary network problems can cause timeouts leading to call failures and "number not in service" messages [(source)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334001638876250233) 2. Vapi SIP service disruptions - Intermittent issues with Vapi's SIP service can cause calls to be refused temporarily [(source)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1340082214146146435) 3. Telephony response issues - If the "telephony did not respond or connect," the call may be dropped but work on retry [(source)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1333747605628391434) 4. Scaling issues - Temporary scaling problems within Vapi can lead to call disconnections [(source)](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1338522863510093824) To investigate further, you can look up your Call ID in the Vapi dashboard: 1. Go to the Vapi Dashboard 2. Navigate to the left side of dashboard (navbar) and look for logs > calls 3. Find your Call ID (

4f6a968c-9f17-4e20-8431-d0dd06c04495

) If you need more detailed information, you can contact Vapi support with this Call ID, and they can check the specific logs to determine exactly what happened with your call. Is there anything else you'd like to know about troubleshooting call issues in Vapi? Sources:

Hey, this call was ended because the customer did not answer. 🟢 17:04:26:456 Call 4f6a968c-9f17-4e20-8431-d0dd06c04495 Done. (customer-did-not-answer)