I assumed individual professionals, things like an agent or a lawyer. Particularly as I saw an example where several different names redirected to the same numb

I assumed individual professionals, things like an agent or a lawyer. Particularly as I saw an example where several different names redirected to the same number. Any idea what the second column is? It's labeled "CL" with the possible responses of L, N, R, or D. R seems to be reserved, D in dispute but L and N I can't place.