7 classes are annotated with Geocoder in Geolocation Field 8.3

Dummy in tests/modules/geolocation_dummy_geocoder/src/Plugin/geolocation/Geocoder/Dummy.php

Provides the Google Geocoding API.

Geocodio in modules/geolocation_geocodio/src/Plugin/geolocation/Geocoder/Geocodio.php

Provides a Geocodio integration.

GoogleGeocodingAPI in modules/geolocation_google_maps/src/Plugin/geolocation/Geocoder/GoogleGeocodingAPI.php

Provides the Google Geocoding API.

GooglePlacesAPI in modules/geolocation_google_maps/modules/geolocation_google_places_api/src/Plugin/geolocation/Geocoder/GooglePlacesAPI.php

Provides the Google Places API.

Nominatim in modules/geolocation_leaflet/src/Plugin/geolocation/Geocoder/Nominatim.php

Provides the Nominatim API.

Photon in modules/geolocation_leaflet/src/Plugin/geolocation/Geocoder/Photon.php

Provides the Photon.

Yandex in modules/geolocation_yandex/src/Plugin/geolocation/Geocoder/Yandex.php

Provides the Yandex.