Dockerhub has reported the incident as Resolved:


February 22, 2019 12:44PM PST
February 22, 2019 8:44PM UTC
[Resolved] This issue has been resolved.

More info here: https://status.docker.com/pages/incident/533c6539221ae15e3f000031/5c705ae105b76a35c3765c30

Docker has reported a new issues with Docker Hub

https://status.docker.com/pages/incident/533c6539221ae15e3f000031/5c705ae105b76a35c3765c30

Update from February 22, 2019 8:26PM UTC

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Issues pushing/pulling from registryPartial Service Disruption
Components
Docker Hub Registry

Locations
IAD3


February 22, 2019 12:26PM PST
February 22, 2019 8:26PM UTC[Identified] We have identified the issue and are actively deploying a fix.