Andalusia Public Library Network (comprising 753 libraries).
Aragon Library Network (comprising 115 libraries).
Canary Islands Library Network (BICA) (comprising 218 libraries).
Cantabria Library Network (BiblioCan) (comprising 58 libraries).
Castile and Leon Library Network (RABEL) (comprising 400 libraries).
Castile-La Mancha Public Library Network (comprising 445 libraries).
Public Libraries of Catalonia (ARGUS) (comprising 211 libraries).
Region of Madrid Public Library Network (comprising 317 libraries).
Navarre Library Network (comprising 93 libraries).
Valencian Public Reading Electronic Network (comprising 331 libraries).
Extremadura Library Network (comprising 39 libraries).
Galicia Library Network (comprising 117 libraries).
BPE in Palma.
BPE in Maó-Mahón.
La Rioja Public Reading Network (comprising 30 libraries).
Euskadi Public Reading Network (comprising 340 libraries).
Asturias Public Library Network (comprising 151 libraries).
Region of Murcia Public Library Network (comprising 121 libraries).
BPE in Ceuta.
BPE in Melilla.