I seem to be getting DNS errors trying to connect to PSN this morning. Otherwise internet seems fine from my other devices.
PSN network status site shows everything is up though
https://status.playstation.com/en-us/_?smcid=web_pdc:status:support-subnav
Edit Update 1:
The PSN network status page now shows this "error"
Affected Platforms:
PS3™
Affected Services:
You may have some difficulty accessing features and products on the PlayStation®Store. Our engineers are working to resolve the issue as soon as possible, and we thank you for your patience.
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I can't sign in either (Western PA). The PSN status link is junk. It constantly shows everything is fine when PSN is down. I use http://downdetector.com/status/playstation-network when I can't login. It looks like the outage is affecting the east coast and all of Japan.