<https://nap-pre.dgt.es/lodroadtran18/recurso/transporte/dtx_srti/roads/CarreterasRCE/N-621> <http://cef.uv.es/lodroadtran18/def/transporte/dtx_srti/roads#carretera_Itinerario> "León (int. con LE-20) / Unquera (int. con N-634)." .
<https://nap-pre.dgt.es/lodroadtran18/recurso/transporte/dtx_srti/roads/CarreterasRCE/N-621> <http://cef.uv.es/lodroadtran18/def/transporte/dtx_srti/roads#carretera_Denominacion> "León a Santander por Potes." .
<https://nap-pre.dgt.es/lodroadtran18/recurso/transporte/dtx_srti/roads/CarreterasRCE/N-621> <http://cef.uv.es/lodroadtran18/def/transporte/dtx_srti/roads#carretera_COD> "N-621" .
<https://nap-pre.dgt.es/lodroadtran18/recurso/transporte/dtx_srti/roads/CarreterasRCE/N-621> <http://www.w3.org/2000/01/rdf-schema#label> "CarreterasRCE #N-621" .
<https://nap-pre.dgt.es/lodroadtran18/recurso/transporte/dtx_srti/roads/CarreterasRCE/N-621> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://cef.uv.es/lodroadtran18/def/transporte/dtx_srti/roads#CarreterasRCE> .