What is Network code for Cingular - Maryland

[Oliver62]

When I did a search for the network code I came up with
Network Code 310 150,170,410
310 150 is likely for Bell south
310 170 is likely for Pacific Bell
Should I conclude that 310 410 is for east cost?
Is it the therefore valid for Maryland?
Thanks in advance for any help.

[crashynot]

your network code for
U.S.A.
CINGULAR
is 31017
only
this one others not needed