You can get Developer ID, name, location, organization from the certificate. Thou developer id or details may change in the play store, the original cert are always in use especially if the developer is providing and update to their apk.
Developer changing details in the play store does not change their original certificate.
Android requires that all APKs be digitally signed with a certificate before they can be installed.
A public-key certificate, also known as a digital certificate or an identity certificate, contains the public key of a public/private key pair, as well as some other metadata identifying the owner of the key. The owner of the certificate holds the corresponding private key.
More information regarding the certificate details can be found at android developer site