apt-cache

$ apt-cache policy init-system-helpers lsb-base
init-system-helpers:
  Installed: 1.14
  Candidate: 1.14
  Version table:
 *** 1.14 0
        500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
lsb-base:
  Installed: 4.1+Debian11ubuntu6.1
  Candidate: 4.1+Debian11ubuntu6.1
  Version table:
 *** 4.1+Debian11ubuntu6.1 0
        500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     4.1+Debian11ubuntu6 0
        500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages