| 1 | AS12956 | Telxius Cable | 185 | 0 | 28 | 3 |
| 2 | AS29119 | Aire Networks del Mediterraneo | 179 | 4 | 391 | 13 |
| 3 | AS3352 | Telefonica de España | 66 | 1 | 209 | 17 |
| 4 | AS12357 | COMUNITEL | 62 | 2 | 17 | 0 |
| 5 | AS8903 | LYNTIA NETWORKS (Main AS) | 60 | 1 | 98 | 8 |
| 6 | AS12479 | Orange Spain | 56 | 2 | 6,908 | 1,320 |
| 7 | AS35699 | Adamo Telecom Iberia S.A | 37 | 1 | 113 | 6 |
| 8 | AS3262 | Sarenet, S.A. | 33 | 3 | 19 | 1 |
| 9 | AS15704 | MásMóvil | 30 | 5 | 313 | 55 |
| 10 | AS49600 | NEARIP | 27 | 2 | 6 | 1 |
| 11 | AS34696 | Mismelink Networks, Sl | 24 | 1 | 9 | 0 |
| 12 | AS8637 | SpainWISP | 23 | 2 | 4 | 4 |
| 13 | AS34471 | Free Technologies Excom | 20 | 3 | 76 | 9 |
| 14 | AS766 | RedIRIS/Red.es | 20 | 1 | 30 | 3 |
| 15 | AS13287 | NIXVAL | 19 | 3 | 47 | 8 |
| 16 | AS211826 | Istqrar for Servers Services | 19 | 9 | 43 | 5 |
| 17 | AS201942 | Soltia Consulting SL | 15 | 2 | 64 | 1 |
| 18 | AS210321 | Operadors Quilometre Zero | 14 | 2 | 4 | 1 |
| 19 | AS201746 | Olivenet Network | 13 | 3 | 75 | 0 |
| 20 | AS200845 | Avatel Telecom | 11 | 3 | 466 | 2 |
| 21 | AS2134 | Santander Global Technology and Operations, S.L. | 11 | 10 | 132 | 0 |
| 22 | AS15954 | Tecnocratica | 11 | 1 | 14 | 3 |
| 23 | AS215691 | Ap Interactive Solutions Sl | 11 | 4 | 12 | 1 |
| 24 | AS39640 | Valor Information Technologies, S.L. | 11 | 1 | 4 | 0 |
| 25 | AS12338 | EUSKALTEL S.A. | 10 | 3 | 95 | 22 |
| 26 | AS39020 | Comvive Servidores | 10 | 1 | 63 | 3 |
| 27 | AS15699 | ADAM | 10 | 3 | 21 | 5 |
| 28 | AS206276 | Citelia | 10 | 1 | 12 | 0 |
| 29 | AS60134 | Startnix | 10 | 2 | 5 | 0 |
| 30 | AS43833 | Open Cable Telecomunicaciones S.L. | 9 | 3 | 9 | 0 |
| 31 | AS35394 | CABLE AIREWORLD | 8 | 2 | 38 | 3 |
| 32 | AS21057 | Servicios Audiovisuales Overon | 8 | 8 | 22 | 0 |
| 33 | AS59432 | GINERNET | 8 | 3 | 20 | 3 |
| 34 | AS205697 | Alojalia Cloud | 8 | 3 | 9 | 9 |
| 35 | AS34977 | PROCONO | 7 | 2 | 161 | 2 |
| 36 | AS212097 | ALASNET GLOBAL SL | 7 | 3 | 18 | 2 |
| 37 | AS12541 | LYNTIA NETWORKS (Backbone) | 7 | 2 | 12 | 0 |
| 38 | AS8254 | Green Floid LLC | 7 | 4 | 11 | 5 |
| 39 | AS59908 | IslaLink | 7 | 2 | 4 | 1 |
| 40 | AS204861 | Codisa Telco Solutions | 7 | 2 | 4 | 1 |
| 41 | AS6739 | Vodafone ONO | 6 | 1 | 68 | 1 |
| 42 | AS48348 | cloudbuilders | 6 | 5 | 35 | 1 |
| 43 | AS12334 | R Cable y Telecable Telecomunicaciones, S.A.U. | 6 | 2 | 29 | 8 |
| 44 | AS202636 | NETELSERVICES LIMITED | 6 | 2 | 26 | 0 |
| 45 | AS49576 | RED ELECTRICA DE ESPANA S.A.U. | 6 | 5 | 21 | 0 |
| 46 | AS49835 | Fundació Guifi.net | 6 | 3 | 21 | 1 |
| 47 | AS198479 | Nunsys | 6 | 2 | 17 | 0 |
| 48 | AS43578 | Templus Datacenter | 6 | 1 | 14 | 5 |
| 49 | AS5505 | VADAVO | 6 | 1 | 8 | 1 |
| 50 | AS13041 | CSUC | 6 | 2 | 8 | 2 |
| 51 | AS199976 | DUNE TECHNOLOGY | 6 | 2 | 8 | 0 |
| 52 | AS39838 | Priorgame, S.L. | 6 | 2 | 2 | 1 |
| 53 | AS202550 | GLUTEC | 6 | 1 | 2 | 1 |
| 54 | AS12540 | IDECNET | 6 | 2 | 1 | 1 |
| 55 | AS12430 | Vodafone España | 5 | 1 | 44 | 3 |
| 56 | AS201843 | IBERSONTEL | 5 | 3 | 30 | 0 |
| 57 | AS43160 | MalagaDatacenter | 5 | 2 | 22 | 1 |
| 58 | AS12462 | Evolutio Cloud Enabler SA | 5 | 1 | 11 | 1 |
| 59 | AS12946 | R Cable y Telecable Telecomunicaciones, S.A.U. | 5 | 2 | 8 | 5 |
| 60 | AS208569 | NORVOZ | 5 | 2 | 6 | 3 |
| 61 | AS25354 | Entidad Publica Empresarial Red.es | 5 | 5 | 3 | 3 |
| 62 | AS214043 | Cloudfira | 5 | 3 | 3 | 1 |
| 63 | AS216392 | Sergi Garcia Jimenez | 5 | 2 | 2 | 1 |
| 64 | AS57910 | Soluciones Corporativas IP (SCIP) | 4 | 4 | 107 | 12 |
| 65 | AS39551 | CTTI | 4 | 2 | 76 | 0 |
| 66 | AS42947 | SkynetLink Informatica y Redes | 4 | 3 | 70 | 19 |
| 67 | AS212087 | IPXO LIMITED | 4 | 4 | 61 | 0 |
| 68 | AS48427 | VISOVISION S.L. | 4 | 2 | 43 | 0 |
| 69 | AS202513 | Fibercli Proyectos e Innovacion S.L. | 4 | 3 | 26 | 1 |
| 70 | AS34285 | Junta de Andalucia | 4 | 4 | 23 | 0 |
| 71 | AS31577 | Prored Comunicaciones, S.L. | 4 | 1 | 22 | 0 |
| 72 | AS29680 | VozTelecom Sistemas, S.L. | 4 | 2 | 19 | 1 |
| 73 | AS200165 | Asac Comunicaciones S.L. | 4 | 4 | 17 | 2 |
| 74 | AS44585 | EUROFOR CENTRO DE FORMACION S.L | 4 | 4 | 16 | 0 |
| 75 | AS25627 | SYSTEM ONE NOC & DEVELOPMENT SOLUTION S.A. | 4 | 4 | 15 | 0 |
| 76 | AS203068 | Bandalibre Comunicaciones | 4 | 1 | 15 | 0 |
| 77 | AS207046 | Intertelco Services Limited | 4 | 1 | 15 | 0 |
| 78 | AS44431 | Marlink - OmniAccess | 4 | 2 | 13 | 0 |
| 79 | AS218687 | Vsem Network LLC | 4 | 2 | 12 | 0 |
| 80 | AS203936 | Iberwix Telecom | 4 | 2 | 9 | 0 |
| 81 | AS30892 | T-Systems ITC Iberia S.A. | 4 | 1 | 6 | 2 |
| 82 | AS199434 | CONSORCIO DE TELECOMUNICACIONES AVANZADA S.A. | 4 | 2 | 6 | 1 |
| 83 | AS210472 | PARLEM-AS-1 | 4 | 2 | 6 | 0 |
| 84 | AS212755 | ExaCloud | 4 | 4 | 5 | 1 |
| 85 | AS202673 | JSC Comcor | 4 | 1 | 3 | 4 |
| 86 | AS401896 | MISIU LLC | 4 | 2 | 1 | 2 |
| 87 | AS39155 | JETNET WIMAX S.A | 3 | 3 | 88 | 0 |
| 88 | AS41368 | TV ALMANSA, S.L. | 3 | 2 | 77 | 0 |
| 89 | AS209087 | Oeste Digital S.L. | 3 | 3 | 45 | 0 |
| 90 | AS201446 | Soluciones web on line AS201446 | 3 | 3 | 39 | 0 |
| 91 | AS15450 | Alhambra Systems SA | 3 | 2 | 32 | 1 |
| 92 | AS50926 | Axarnet Comunicaciones S.L. | 3 | 3 | 31 | 9 |
| 93 | AS48846 | INETUM ESPAÑA | 3 | 3 | 30 | 0 |
| 94 | AS198144 | COMUNICACIONES RONDA, S.L. | 3 | 2 | 28 | 0 |
| 95 | AS206837 | Air Wifi | 3 | 3 | 28 | 0 |
| 96 | AS51678 | IBERMATICA S.A. | 3 | 2 | 26 | 1 |
| 97 | AS16383 | IT Now S.A. | 3 | 3 | 22 | 0 |
| 98 | AS209281 | GETECOM | 3 | 1 | 18 | 0 |
| 99 | AS199290 | MOWITEL | 3 | 1 | 17 | 0 |
| 100 | AS41397 | Redes Digitales de Telecomunicacion en Internet SL | 3 | 2 | 16 | 0 |
Autonomous Systems in Spain