domain name renewal

[Luck, Deanne]

We just got a renewal notice for our state association's domain name, which
I know is very important to pay!  However, I registered our domain in 1998
with Network Solutions, and now the bill is coming from VeriSign.  I know
the whole registration structure has changed, but how do I know this is the
right company to pay?  It's not listed on the ICANN accredited registrars
list.  Were we notified (and it was lost in the association bureaucracy) who
took over as our registrar? 

DeAnne Luck
Electronic Resources Librarian
Austin Peay State University
LuckDL at apsu.edu