AS11172 — Alestra, S. de R.L. de C.V.

AS11172 announces 120 IPv4 prefixes covering 596,992 addresses and 166 IPv6 prefixes.

About this network

AS11172 is Alestra, one of Mexico's major business telecommunications carriers. Alestra began as a joint venture built around AT&T's entry into the Mexican long-distance market and has since sat inside the Alfa/Axtel group; its market is corporate connectivity, managed networks, data centre and IT services, not consumer broadband.

What it's used for

Carrying a national enterprise network. RIS sees a genuinely large footprint: 924 announced IPv4 prefixes / 603,136 addresses, roughly 2,858 IPv6 prefixes, and 110 observed neighbours. The neighbour count is what places it — dozens of BGP adjacencies means it is selling connectivity and interconnecting with other carriers, while an enterprise of any size would peer with a handful.

Notable

Reverse DNS is uniform and first-party: sampled addresses across 189.206.0.0/16, 148.244.0.0/16, 201.163.0.0/16 and 201.151.0.0/16 all answer as static-<a>-<b>-<c>-<d>.alestra.net.mx. Two things follow. First, holder, address space and rDNS all agree, so this is a real operator's own inventory rather than announced third-party space. Second, the static- convention across the bulk of the space is consistent with fixed assignments to business sites, which matches Alestra's B2B positioning better than any dynamic consumer pool would.

Interesting

The very high IPv6 prefix count relative to IPv4 (thousands of /48s) is the fingerprint of per-customer IPv6 delegation: each corporate site gets its own /48, and many of them end up visible in the global table individually.

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

Announced prefixes

• 38.52.116.0/23
• 38.224.96.0/23
• 45.84.217.0/24
• 143.202.156.0/22
• 148.211.0.0/16
• 148.216.0.0/16
• 148.238.0.0/16
• 148.244.64.0/19
• 148.244.96.0/20
• 148.244.112.0/23
• 148.244.115.0/24
• 148.244.116.0/22
• 148.244.120.0/21
• 148.244.128.0/17
• 148.245.135.0/24
• 148.245.184.0/24
• 161.195.140.0/24
• 189.206.0.0/20
• 189.206.16.0/22
• 189.206.20.0/23
• 189.206.23.0/24
• 189.206.24.0/21
• 189.206.32.0/19
• 189.206.64.0/18
• 189.206.128.0/17
• 192.100.194.0/24
• 192.100.196.0/24
• 192.100.244.0/24
• 192.190.30.0/23
• 192.207.204.0/23
• 193.26.114.0/24
• 198.44.203.0/24
• 200.13.111.0/24
• 200.23.18.0/23
• 200.23.32.0/24
• 200.23.39.0/24
• 200.23.90.0/24
• 200.23.217.0/24
• 200.33.99.0/24
• 200.33.252.0/24
• 200.34.168.0/24
• 200.39.200.0/21
• 200.52.112.0/20
• 200.56.112.0/22
• 200.56.116.0/24
• 200.56.118.0/23
• 200.56.120.0/21
• 200.76.0.0/18
• 200.76.128.0/20
• 200.76.144.0/21
• 200.76.153.0/24
• 200.76.154.0/23
• 200.76.156.0/22
• 200.76.160.0/19
• 200.94.0.0/18
• 200.94.64.0/23
• 200.94.66.0/24
• 200.94.68.0/22
• 200.94.72.0/21
• 200.94.80.0/20
• 200.94.96.0/21
• 200.94.104.0/23
• 200.94.107.0/24
• 200.94.108.0/22
• 200.94.112.0/20
• 200.94.128.0/19
• 200.106.172.0/22
• 200.188.0.0/17
• 200.236.64.0/18
• 201.130.2.0/24
• 201.130.13.0/24
• 201.130.15.0/24
• 201.131.72.0/24
• 201.131.120.0/24
• 201.139.0.0/24
• 201.139.4.0/22
• 201.139.8.0/23
• 201.139.10.0/24
• 201.139.13.0/24
• 201.139.15.0/24
• 201.139.16.0/22
• 201.139.21.0/24
• 201.139.22.0/23
• 201.139.24.0/24
• 201.139.27.0/24
• 201.139.31.0/24
• 201.140.3.0/24
• 201.142.60.0/24
• 201.151.0.0/17
• 201.151.128.0/20
• 201.151.144.0/22
• 201.151.148.0/23
• 201.151.152.0/22
• 201.151.157.0/24
• 201.151.158.0/23
• 201.151.160.0/20
• 201.151.176.0/24
• 201.151.179.0/24
• 201.151.180.0/22
• 201.151.184.0/21

and 186 more.

Upstream networks

• AS174 Cogent Communications, LLC
• AS1299 Arelion Sweden AB
• AS32098 Transtelco Inc
• AS6461 Zayo Bandwidth
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS3491 PCCW Global (HK) Ltd.
• AS23520 Columbus Networks USA, Inc.
• AS6503 Axtel, S.A.B. de C.V.
• AS701 Verizon Business

Downstream networks

• AS10479 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS8007 Servicios Administrados Mexis, S.A. de C.V.
• AS17072 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.
• AS28506 Sistemas de Communicacion GM S.A. de C.V.
• AS28502 Axtel, S.A.B. de C.V.
• AS10436 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS13579 INFOTEC CENTRO DE INVESTIGACION E INNOVACION EN TECNOLOGIAS DE LA INFORMACION Y COMUNICACION
• AS11136 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS28381 Grupo Hidalguense de Desarrollo, S.A. de C.V.
• AS22011 Sixsigma Networks Mexico, S.A. de C.V.
• AS278 Universidad Nacional Autonoma de Mexico
• AS28546 Servnet Mexico, S.A. de C.V.
• AS7038 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS265615 Assetel SA de CV
• AS10560 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS270145 Gualberto Mis Caamal
• AS28539 Administradora de Servicios de Internet Sandur S.A. de C.V.
• AS28418 NUEVA RED INTERNET DE MEXICO S DE RL DE CV
• AS28409 ENI NETWORKS SAPI de CV
• AS265504 DIGITAL COMUNICATIONS DE MEXICO SA DE CV
• AS23154 Sanmina-SCI Corporation
• AS265604 MT NETWORKS S. DE R.L. DE C.V.
• AS10706 YUVOX S.A DE C.V
• AS270217 JAVIER ALEJANDRO OLVERA GRANADOS
• AS270128 DANIEL RIVERA GONZALEZ

Adjacent networks

• AS174 Cogent Communications, LLC
• AS1299 Arelion Sweden AB
• AS32098 Transtelco Inc
• AS6461 Zayo Bandwidth
• AS10479 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS17072 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.
• AS8007 Servicios Administrados Mexis, S.A. de C.V.
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS28506 Sistemas de Communicacion GM S.A. de C.V.
• AS28502 Axtel, S.A.B. de C.V.
• AS3491 PCCW Global (HK) Ltd.
• AS10436 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS13579 INFOTEC CENTRO DE INVESTIGACION E INNOVACION EN TECNOLOGIAS DE LA INFORMACION Y COMUNICACION
• AS11136 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS28381 Grupo Hidalguense de Desarrollo, S.A. de C.V.
• AS22011 Sixsigma Networks Mexico, S.A. de C.V.
• AS278 Universidad Nacional Autonoma de Mexico
• AS28546 Servnet Mexico, S.A. de C.V.
• AS7038 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS265615 Assetel SA de CV
• AS23520 Columbus Networks USA, Inc.
• AS10560 Instituto Tecnologico y de Estudios Superiores de Monterrey
• AS270145 Gualberto Mis Caamal
• AS28539 Administradora de Servicios de Internet Sandur S.A. de C.V.
• AS270200 MEGABIT TELECOMUNICACIONES SA DE CV

Internet exchanges

• MEX-IX McAllen — McAllen, United States
• NIX Monterrey — Monterrey, Mexico