show ip route longer-prefix deprecated?

Hi,

I currently use :

Version: v1.9.0
Build ID: 4901118
Build on: 08/04/16 11:39
Copyright: 2012-2016 Ubiquiti Networks, Inc.
HW model: EdgeRouter Pro 8-Port

And for usage reason I use in general show ip route <prefix/24> longer-prefix to see if the subnet have several more specific routes.

For example I have a /24 in global unicast routes using BGP, and I have to route to null the whole prefix and THEN use more specific.

"longer-prefix" is usefull to see where the more specific prefix is...

Now since it is deprecated, how can I have the information ? (note I have a full view on this router so show ip route will show me tha 600k prefix I have in the RIB...).

Regards,

Xavier