9:02 PM PST Login and teleport are working in the regions which were affected by this Network Issue.
There are network issues that are affecting approximately 450 regions. This translates to not being able to Teleport or Login to these regions. If you experience a related issue please try logging directly into a different region. If you do not have this available, it can be achieved by following these steps:
From in-world: Edit > Preferences > General tab > check Show Start Location on Login screen > Apply
From login screen: Preferences > General tab > check Show Start Location on Login screen > Apply
Then, when at the login screen, use the pull-down menu under your login information. Choose <Type Region Name here> and enter a region name (i.e., Cyclops, Sandbox Newcomb, Levenhall, Teal, etc..). If you are still unable to login, please try logging into a different region.