Files with aeg file extension might have been found as part of Netmino contacts manager and address book for iOS 3 devices.
AEG file extension - Netmino data
What is aeg file? How to open aeg files?
File type specification:
The aeg file extension seems to have been used in old, and now discontinued program called Netmino for one of its default file types.
Netmino was a comprehensive, relational address book and contacts manager for iOS 3.
This aeg file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.