Not on a router, using my cell phone as a hotspot.  I'll turn it off/ back on, see if that helps.  Checked the isitdown site and others are reporting the same problem, so maybe it's Twitter, not me.  Would be nice if someone would try some of the names and see if it's working for them. Edit: turned phone off/on, cleared cookies.  Still no pages. Edit 11:25pm.  Can see pages again, must have been Twitter, seeing if we are paying attention.