Generate numpy matrix with unique range for each element

I'm trying to generate random matrices. However, each element of the random matrix has a different range. So I want to generate a random matrix such that each element has that random number within that range. So far i've been able to generate matrices with unique column ranges:

c1 = np.random.uniform(low=2, high=1000, size=(15,1))
c2 = np.random.uniform(low=0.001, high=100, size=(15,1))
c3 = np.random.uniform(low=30, high=10000, size=(15,1))
c4 = np.random.uniform(low=1, high=25, size=(15,1))

mtx = np.concatenate((c1,c2,c3,c4), axis=1)

Now Low and high for rows in mtx is also quite different. How can I generate such random matrix with each row element also having unique range and not just columns?