The oc get proxy command can be used to list the proxy servers, if you have any proxy servers configured. In this example, there is a proxy server named "cluster".

~]$ oc get proxy
NAME      AGE
cluster   622d

The oc describe proxy cluster command can be used to display more information on the cluster proxy server (http://proxy.example.com in this example).

~]$ oc describe proxy cluster
Name:         cluster
Namespace:    
Labels:       <none>
Annotations:  <none>
API Version:  config.openshift.io/v1
Kind:         Proxy
Metadata:
  Creation Timestamp:  2020-09-30T15:40:25Z
  Generation:          1
  Managed Fields:
    API Version:  config.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:spec:
        .:
        f:httpProxy:
        f:httpsProxy:
        f:noProxy:
        f:trustedCA:
          .:
          f:name:
      f:status:
        .:
        f:httpProxy:
        f:httpsProxy:
    Manager:      cluster-bootstrap
    Operation:    Update
    Time:         2020-09-30T15:40:25Z
    API Version:  config.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:status:
        f:noProxy:
    Manager:         cluster-network-operator
    Operation:       Update
    Time:            2022-02-02T14:20:38Z
  Resource Version:  747167713
  Self Link:         /apis/config.openshift.io/v1/proxies/cluster
  UID:               69f64d95-6665-4233-8ce5-813b2cf84e06
Spec:
  Http Proxy:   http://proxy.example.com
  Https Proxy:  http://proxy.example.com
  No Proxy:     .example.com
  Trusted CA:
    Name:  user-ca-bundle
Status:
  Http Proxy:   http://proxy.example.com
  Https Proxy:  http://proxy.example.com
  No Proxy:     .cluster.local,.svc,.example.com,10.9.0.0/14,localhost
Events:         <none>