The connected BRMs and BVRs along with license usage can be checked using brm -l command.
[BRM1-10.50.7.1]#brm -l Running commands: -l ----------------------------- License Type: Cloud Expiry : 28 Feb 2019 Max calls : 2000 Expired : no Connected BRMs 3 Name : BRM 7.11.0-89 intel Host name : host-1 Host IP : 10.50.7.2 Name : BRM 7.11.0-89 intel Host name : centos7sx64 Host IP : 10.50.7.1 Name : BRM 7.11.0-89 intel Host name : host-2 Host IP : 10.50.7.3 Connected BAMs 1 Name : BAM 7.11.0-89 intel Host name : host-3 Host IP : 10.50.7.4 Connected BVRs 2 Name : BVR Linux 7.11.0-89 intel Host name : host-5 Host IP : 10.50.7.6 Licenses : 179 Capabilities: Inbound calls Name : BVR Linux 7.11.0-89 intel Host name : host-4 Host IP : 10.50.7.5 Licenses : 179 Capabilities: Inbound calls, CCXML