AS205718 — ALCORT ALCORT INGENIERIA Y ASESORIA S.L.

Network type: residential

AS205718 announces 9 IPv4 prefixes covering 9,216 addresses and 9 IPv6 prefixes.

About this network

ALCORT is operated by Alcort Ingeniería y Asesoría S.L.

What it's used for

• The address space carries regional fiber optic and telecommunications infrastructure, evidenced by registrants like SEROSENSE TELECOM S.L.U., CECSA TELECOM S.L.U., and Inpecuarias Fibra S.L.
• With 9216 IPv4 addresses and 17 observed neighbours, the ratio indicates a regional access network rather than a transit provider
• Traffic consists of subscriber eyeballs and business endpoints connected via fiber optic deployments in Spain

Notable

• Registrants vary across the announced prefixes, including Alset Servicios SL, REDJAM TELECOM SLU, and ADURIZ ENERGIA SLU, suggesting a multi-entity or leased space arrangement under the Alcort AS
• The inventory consists of nine /22 IPv4 blocks and nine IPv6 prefixes, all located in Spain

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 77.83.144.0/22
• 185.205.112.0/22
• 185.208.220.0/22
• 185.210.20.0/22
• 185.226.168.0/22
• 185.229.156.0/22
• 185.229.196.0/22
• 185.231.116.0/22
• 185.248.20.0/22
• 2a09:1780::/34
• 2a09:8ac0::/32
• 2a09:c5c0::/32
• 2a09:c740::/32
• 2a09:dd40::/32
• 2a09:eb40::/32
• 2a09:f4c0::/32
• 2a09:fbc0::/32
• 2a09:fcc0::/32

Upstream networks

• AS6939 Hurricane Electric LLC
• AS12479 Orange Espagne SA
• AS29632 Netassist International EOOD
• AS37721 Virtual Technologies & Solutions
• AS33891 Core-Backbone GmbH

Downstream networks

• AS202440 Comunicaciones Opticas Waditel, S.L.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS202440 Comunicaciones Opticas Waditel, S.L.
• AS12479 Orange Espagne SA
• AS37721 Virtual Technologies & Solutions
• AS33891 Core-Backbone GmbH
• AS29632 Netassist International EOOD

Routing security

• RPKI: 18 valid, 0 invalid and 0 not-found announcements; 18 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 19 route objects.
• Listed in as-sets: AS-12715-CUSTOMERS, AS-ALCORT205718-TRANSITO, AS-HURRICANE, AS-HURRICANEV6, AS-TRANSROUTE-SPEC, AS48793:AS-DECIX-MAD-CONNECTED, AS48793:AS-DECIX-MAD-RS, AS48793:AS-DECIX-MAD-RS-V6.

Internet exchanges

• DE-CIX Madrid — Madrid, Spain
• ESpanix Madrid Lower LAN — Madrid, Spain