iOS CocoaPods - how to find out available versions of a specific pod, not cocoapods itself? -

i'm trying revert previous version of specific pod, cant find command listing versions can revert to. let's have:

pod 'afnetworking', '~> 2.3.0' 

how can learn versions of specific cocoapod (ex: afnetworking) can install? want see if has 2.3.1, 2.3.5, 2.4.1, etc.

ps. google overflowing questions how check version of cocoapods itself, i'm asking version history of specific pods avaialable through framework.

pod search afnetworking 

using above command brings info related pod (if exists)

following output when fire above command

afnetworking (3.1.0) delightful ios , os x networking framework. pod 'afnetworking', '~> 3.1.0' - homepage: https://github.com/afnetworking/afnetworking - source: https://github.com/afnetworking/afnetworking.git - versions: 3.1.0, 3.0.4, 3.0.3, 3.0.2, 3.0.1, 3.0.0, 3.0.0-beta.3, 3.0.0-beta.2, 3.0.0-beta.1, 2.6.3, 2.6.2, 2.6.1, 2.6.0, 2.5.4, 2.5.3, 2.5.2, 2.5.1, 2.5.0, 2.4.1, 2.4.0, 2.3.1, 2.3.0, 2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0, 2.1.0, 2.0.3, 2.0.2, 2.0.1, 2.0.0, 2.0.0-rc3, 2.0.0-rc2, 2.0.0-rc1, 1.3.4, 1.3.3, 1.3.2, 1.3.1, 1.3.0, 1.2.1, 1.2.0, 1.1.0, 1.0.1, 1.0, 1.0rc3, 1.0rc2, 1.0rc1, 0.10.1, 0.10.0, 0.9.2, 0.9.1, 0.9.0, 0.7.0, 0.5.1 [master repo] - subspecs: - afnetworking/serialization (3.1.0) - afnetworking/security (3.1.0) - afnetworking/reachability (3.1.0) - afnetworking/nsurlsession (3.1.0) - afnetworking/uikit (3.1.0)

it has other info version info.