Upon news of Mozilla spearheading the movement to deprecate non-secure HTTP, Mozilla had release an FAQ which listed two SSL certificate authorities that provide free trusted certificates to use: StartSSL and WoSign.
I have only heard of StartSSL and have been using it for the past few years, but they restrict the certificates to only allow one subdomain to be added. So I decided to try WoSign to get another subdomain on another certificate to use on another server. But to my surprise, WoSign allows up to 100 domain names to be added to the certificate!
I quickly opened up my notepad and entered in the subdomains I needed but only came up with a handful. So I decided to search for lists of common or standard subdomains and still fell short. By trying to future proof the certificate, I have compiled a list of a bit over 100 subdomains below. Enjoy!
a.domain.tld
ad.domain.tld
admin.domain.tld
ads.domain.tld
api.domain.tld
assets.domain.tld
atom.domain.tld
autodiscover.domain.tld
b.domain.tld
bin.domain.tld
blog.domain.tld
blogs.domain.tld
buy.domain.tld
c.domain.tld
calendar.domain.tld
camo.domain.tld
ci.domain.tld
client.domain.tld
clients.domain.tld
contacts.domain.tld
d.domain.tld
dash.domain.tld
dashboard.domain.tld
data.domain.tld
db.domain.tld
demo.domain.tld
desktop.domain.tld
dev.domain.tld
developer.domain.tld
developers.domain.tld
devs.domain.tld
dl.domain.tld
docs.domain.tld
e.domain.tld
email.domain.tld
f.domain.tld
feed.domain.tld
files.domain.tld
forum.domain.tld
forums.domain.tld
ftp.domain.tld
g.domain.tld
git.domain.tld
go.domain.tld
h.domain.tld
i.domain.tld
ip.domain.tld
images.domain.tld
imap.domain.tld
img.domain.tld
imgs.domain.tld
j.domain.tld
js.domain.tld
json.domain.tld
k.domain.tld
kb.domain.tld
l.domain.tld
lab.domain.tld
law.domain.tld
learn.domain.tld
m.domain.tld
mail.domain.tld
manage.domain.tld
me.domain.tld
media.domain.tld
mx.domain.tld
my.domain.tld
n.domain.tld
news.domain.tld
o.domain.tld
owl.domain.tld
p.domain.tld
pages.domain.tld
photo.domain.tld
play.domain.tld
pop.domain.tld
pop3.domain.tld
preview.domain.tld
q.domain.tld
r.domain.tld
resource.domain.tld
resources.domain.tld
rss.domain.tld
s.domain.tld
search.domain.tld
secure.domain.tld
server.domain.tld
services.domain.tld
sites.domain.tld
smtp.domain.tld
ssl.domain.tld
staging.domain.tld
static.domain.tld
stats.domain.tld
status.domain.tld
storage.domain.tld
support.domain.tld
t.domain.tld
tag.domain.tld
u.domain.tld
user.domain.tld
v.domain.tld
video.domain.tld
videos.domain.tld
vid.domain.tld
vids.domain.tld
voip.domain.tld
vpn.domain.tld
w.domain.tld
web.domain.tld
wiki.domain.tld
www.domain.tld
x.domain.tld
xml.domain.tld
y.domain.tld
yaml.domain.tld
z.domain.tld