how to find organization short name by organization ID?

[hoogw]

These mix of letter and number long string is arcgis online organization ID.

These ID does not tell you who is owner, if you can find the organization short name behind these ID, then you know the owner.  These red part are organization short name.

This is structure of Arcgis REST api endpoint. 

https://services1.arcgis.com/[Organization ID]/arcgis/rest/services/[Feature Service Name]/FeatureSe...

As you can see, organization ID placed right after arcgis.com.

ESRI must have database to link the org id with org name.  The question is how we as public user can access this information?

Has ESRI give public access to this information ?

[DavidPike · Accepted solution]

You should be able to identify the Org name from their URL via

https://www.arcgis.com/sharing/rest/portals/<Org ID here>f=json

there's a urlKey JSON node/key