In fact, I seem to recall that the first new owner was able to obtain a change in the number's portion of the address, but that it is now listed under the original address on (I think) 15th Street.
Third one down - 749 - 15th Street:
http://lycos.colorado.oodle.com/housing/sale/-/bathrooms_7+?loc=zip_80309%3A10
Note that when JonBenet was killed, the home's address was 755 - 15th Street. It was changed by the city ... for obvious reasons.