In Exif, each maker-note will have a unique (hex) id. ExifTool can be used to query a maker note’s contents by its id as follows:
exiftool -u -b -Unknown_0x0013 image.jpg
This will return the value for makernote id 0x0013 contained in image.jpg.
Address: 43 Churchgate, Wicklow, Co. Wicklow, Ireland.
Telephone: +353 87 2236429