<s>
.at	B-General_Concept
is	O
the	O
Internet	B-Application
country	I-Application
code	I-Application
top-level	O
domain	O
(	O
ccTLD	B-Application
)	O
for	O
Austria	O
.	O
</s>
<s>
It	O
is	O
administered	O
by	O
nic.at	B-Protocol
.	O
</s>
<s>
The	O
.at	B-General_Concept
top-level	O
domain	O
has	O
a	O
number	O
of	O
second-level	B-Protocol
domains	I-Protocol
:	O
</s>
<s>
Given	O
the	O
number	O
of	O
English	O
words	O
that	O
end	O
with	O
-at	O
,	O
this	O
presents	O
the	O
possibility	O
for	O
many	O
domain	B-Application
hacks	I-Application
.	O
</s>
<s>
Domain	B-Application
hacks	I-Application
treating	O
"	O
at	O
"	O
as	O
a	O
word	O
in	O
its	O
own	O
right	O
(	O
such	O
as	O
arrive.at	O
)	O
are	O
widespread	O
.	O
</s>
<s>
As	O
of	O
today	O
,	O
there	O
are	O
very	O
few	O
such	O
domain	O
names	O
left	O
available	O
on	O
the	O
domain	O
prime	O
market	O
as	O
the	O
result	O
of	O
domain	B-Protocol
name	I-Protocol
speculation	I-Protocol
.	O
</s>
<s>
Some	O
known	O
examples	O
of	O
the	O
Austrian	O
domain	B-Application
hacks	I-Application
are	O
:	O
</s>
<s>
An	O
.at-Domain	O
can	O
be	O
between	O
one	O
and	O
63	O
characters	O
long	O
.	O
</s>
<s>
Registrations	O
of	O
internationalized	B-Language
domain	I-Language
names	I-Language
are	O
accepted	O
.	O
</s>
<s>
The	O
.at-Domain	O
started	O
using	O
DNSSEC	B-Protocol
in	O
2011	O
in	O
order	O
to	O
guarantee	O
the	O
authenticity	O
and	O
integrity	O
of	O
the	O
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
's	O
data	O
.	O
</s>
<s>
Before	O
August	O
2016	O
,	O
it	O
was	O
only	O
possible	O
to	O
register	O
.at-Domains	O
with	O
three	O
or	O
more	O
(	O
two	O
for	O
co.at,	O
ac.at,	O
gv.at,	O
or.at	O
)	O
characters	O
.	O
</s>
