Debugging Linux ACL's

Hello,

I have this, from executing the following command:

/home/samba/shares/ivm_dbase/DBASE4

# file: home/samba/shares/ivm_dbase/DBASE4
# owner: root
# group: Administrators
user::rwx
user:root:rwx
user:admin_acct:rw-
user:3000000:rwx
user:3000002:rwx
group::rwx
group:Administrators:rwx
group:3000002:rwx
group:Staff:rwx
group:MYOB:rwx
mask::rwx
other::---
default:user::rwx
default:user:root:rwx
default:user:3000000:rwx
default:user:3000002:rwx
default:group::---
default:group:Administrators:rwx
default:group:3000002:rwx
default:group:Staff:rwx
default:group:MYOB:rwx
default:mask::rwx
default:other::---

My question is how do I find out who user:3000000 and user:3000002 is?
-- 
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