What is pingtail?

As an AI language model, I do not have access to proprietary information or special knowledge about specific products or services. However, I can tell you that "pingtail" could refer to a network diagnostic tool that measures the response time of a computer network. It sends data packets to a specific network address and measures the time it takes for a response to be received, providing information about network connectivity and performance. It could also refer to a proprietary software program or application developed by a specific company. Without more context or information, it is difficult to provide a more detailed explanation.