A current connection issue is affecting the ability for many users to access the PlayStation Network on all fronts.
Specific details regarding the issue are not clear, and the only background information regarding the existence of this issue is a "high volume." According to the official statement listed on the PlayStation Knowledge Center is as follows:
"The PlayStation Network is currently experiencing high volume and users may experience issues when connecting to the service. We will update you with any changes that may occur in regards to this issue. Thank you for your patience."
A common error code coming from this issue is error code NW-31201-7, and many Twitter users have indicated the presense of this error code during this PSN downtime. The error codes listing on the PlayStation Knowledge Center also details that error code NW-31201-7 refers to an inability to connect to the network. Though the declared recommendations through the Knowledge Center don't exactly apply to restablishing connectivity in this case since the issue appears to be on Sony's end, we still recommend attempting the recommended actions to ensure that individuals aren't being limited by localized issues.
No official report has been published by Sony as of yet, but we at PSU will update the post as that information is produced.