Mozilla market
webob Pylons-framework add-on
451 test page
For DMCA notices
returns 451 in the UK - NSFW
Falkvinge.net
UK Open Rights Group: 451 Unavailable
The Atlantic
The Guardian
Digital Trends
Techdirt
CNN
Motherboard by Vice
undernews.fr
Quartz by The Atlantic
WebMonkey
The Register
Forbes
PublicKey1.jp