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0551

0551 is most widely recognized as the telephone area code assigned to Hefei, the capital city of Anhui Province in eastern China. It forms part of China's national system of area codes used to route landline calls to specific cities and regions. In international dialing, calls to Hefei landlines use the format +86 551 followed by the local number, with the leading zero omitted in international contexts.

Domestically within China, calls to Hefei from another city typically use the long-distance dialing sequence 0

Beyond telecommunications, 0551 may appear as a numeric string in various contexts, such as identifiers or

551
followed
by
the
local
number.
When
calling
from
within
Hefei
itself,
callers
generally
use
the
local
number
without
the
area
code.
The
0551
area
code
covers
Hefei
and
its
surrounding
urban
districts
as
defined
by
the
national
telephone
numbering
plan.
catalog
numbers,
but
it
does
not
have
a
widely
recognized,
distinct
meaning
outside
the
telephone
numbering
system.
In
computing,
numbers
with
leading
zeros
can
be
interpreted
as
octal
literals
in
some
programming
languages,
in
which
case
0551
can
be
read
as
a
representation
that
equates
to
a
different
decimal
value,
depending
on
the
language’s
rules.