Hi Evelyn,
On HAR once you have completed your search and you are on the list of results page the MLS number should be listed 2 lines underneath the address.
It will say MLS# and then the coordinating number that represents the property.
Once you have opened the property page it can also be found listed underneath the General Description category. It is at the very bottom of the category, listed under MLS #.
I hope this was helpful, if you need any further assistance please feel free to let me know and I would be more than happy to assist you.
Thanks!
Lander Wendland
Bernstein Realty
m-713.540.0394