Pixel™, Phone by Google - View Contact Sync Source
To view where a phonebook contact was imported from, see this info. If you need to transfer contacts and media from one device to another, follow these step-by-step instructions before activating the new device.
Imported contacts can originate from multiple sources (e.g., work email, Facebook, Google, apps, etc.). View this info to determine the import source.
From a Home screen, touch and swipe up to display all apps.
Tap Contacts .
Tap a contact then tap the Edit icon .
From Edit contact, view the contact source (located above the contact name).