Thank you, works.

freeswitch@example> show calls
0 total.

freeswitch@example> show channels

uuid,direction,created,created_epoch,name,state,cid_name,cid_num,ip_addr,dest,application,application_data,dialplan,context,read_codec,read_rate,write_codec,write_rate,secure,hostname,presence_id,presence_data
02eebd72-af53-11df-b708-69c5ea8291c5,inbound,2010-08-24 09:41:31,1282635691,sofia/internal/2001@78.23.89.xxx,CS_EXECUTE,2001,2001,78.23.89.xxx,5000,ivr,demo_ivr,XML,default,PCMA,8000,PCMA,8000,,example,2001@78.23.89.xxx,

1 total.

freeswitch@example> uuid_exists 02eebd72-af53-11df-b708-69c5ea8291c5

true
freeswitch@example>