http://0177.1/
http://0x7f.1/
http://127.000.000.1
https://520968996
Note: The latter can be calculated using http://www.subnetmask.info/
Exotic Handlers
gopher://, dict://, php://, jar://, tftp://
IPv6
http://[::1]
http://[::]
Wildcard DNS
10.0.0.1.xip.io
www.10.0.0.1.xip.io
mysite.10.0.0.1.xip.io
foo.bar.10.0.0.1.xip.io
Link: http://xip.io
10.0.0.1.nip.io
app.10.0.0.1.nip.io
customer1.app.10.0.0.1.nip.io
customer2.app.10.0.0.1.nip.io
otherapp.10.0.0.1.nip.io
Link: http://nip.io
AWS EC2 Metadata
http://169.254.169.254/latest/meta-data/
http://169.254.169.254/latest/meta-data/local-hostname
http://169.254.169.254/latest/meta-data/public-hostname
If there is an IAM role associated with the instance, role-name is the name of the role, and role-name contains the temporary security credentials associated with the role [...]
Link: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html (includes a comprehensive Instance Metadata Categories table)