Subdomains to restrict from your SaaS app

Many SaaS apps allow users to host their websites under their root domain, e.g. GitHub allows you to host your sites using GitHub Pages under the .github.io domain.

Here is a list of subdomains which you should reserve while building your own SaaS product.

I usually put this data in a /data/reserved_subdomains file and then use it like below:

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class Site < ActiveRecord::Base
#...
# validations
SUBDOMAIN_RX = /\A[a-z\d]+(-[a-z\d]+)*\Z/i
validates :subdomain, presence: true,
uniqueness: true,
length: { in: 4..63 , unless: Proc.new{ user && user.admin? }},
format: {:with => SUBDOMAIN_RX},
exclusion: { in: File.read(Rails.root.join("./data/reserved_subdomains")).each_line.map{|x| x.strip} , unless: Proc.new{ user && user.admin? }}
#...
end
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about
abuse
access
account
accounts
address
admanager
admin
admindashboard
administration
administrator
administrators
admins
adsense
adult
advertising
adwords
affiliate
affiliates
ajax
analytics
android
anon
anonymous
api1
api2
api3
apps
archive
assets
assets1
assets2
assets3
assets4
assets5
atom
auth
authentication
avatar
backup
banner
banners
beta
billing
billings
blog
blogs
board
bots
business
cache
cadastro
calendar
campaign
careers
chat
client
cliente
clients
cname
code
comercial
community
compare
compras
config
connect
contact
contest
copyright
cpanel
create
css1
css2
css3
dashboard
data
delete
demo
design
designer
devel
developer
developers
development
directory
docs
domain
donate
download
downloads
ecommerce
edit
editor
email
e-mail
example
favorite
feed
feedback
feeds
file
files
flog
follow
forum
forums
free
gadget
gadgets
games
gettingstarted
graph
graphs
group
groups
guest
help
home
homepage
host
hosting
hostmaster
hostname
html
http
httpd
https
image
images
imap
img1
img2
img3
inbox
index
indice
info
information
intranet
invite
invoice
invoices
ipad
iphone
jabber
jars
java
javascript
jobs
knowledgebase
launchpad
legal
list
lists
login
logout
logs
mail
mail1
mail2
mail3
mail4
mail5
mailer
mailing
main
manage
manager
marketing
master
media
message
messages
messenger
microblog
microblogs
mine
mobile
movie
movies
music
musicas
mysql
name
named
network
networks
news
newsite
newsletter
nick
nickname
notes
noticias
official
online
operator
order
orders
page
pager
pages
panel
partner
partnerpage
partners
password
payment
payments
perl
photo
photoalbum
photos
pics
picture
pictures
plugin
plugins
policy
pop3
popular
portal
post
postfix
postmaster
posts
press
privacy
private
profile
project
projects
promo
public
python
random
redirect
register
registration
resolver
root
ruby
sale
sales
sample
samples
sandbox
script
scripts
search
secure
security
send
server
servers
service
setting
settings
setup
shop
signin
signup
site
sitemap
sitenews
sites
smtp
soporte
sorry
staff
stage
staging
start
stat
static
statistics
stats
status
store
stores
subdomain
subscribe
suporte
support
survey
surveys
system
tablet
tablets
talk
task
tasks
teams
tech
telnet
test
test1
test2
test3
teste
tests
theme
themes
todo
tools
trac
translate
update
upload
uploads
usage
user
username
usernames
users
usuario
validation
validations
vendas
video
videos
visitor
webdisk
webmail
webmaster
website
websites
whois
wiki
workshop
www1
www2
www3
www4
www5
www6
www7
wwws
wwww
yourdomain
yourname
yoursite
yourusername

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