AS11992 — LIBERTY-MOB-

AS11992 announces 61 IPv4 prefixes covering 104,448 addresses and 1 IPv6 prefixes.

About this network

LIBERTY-MOB-PR is Liberty Mobile Puerto Rico Inc., the wireless and wireline carrier that Liberty Latin America bought from AT&T in 2020. AT&T had itself acquired the business from Centennial Communications in 2009, and the network still wears Centennial's name in DNS.

What it's used for

• A real carrier estate: RIS observes 41 IPv4 prefixes covering roughly 110,000 addresses plus one IPv6 /32, against 19 neighbours. That address count with a double-digit neighbour count is an access network with its own transit relationships, not a hosting shop and not a wholesale backbone.
• Reverse DNS is uniform and first-party: nearly every sampled address resolves under centennialpr.net, split between -static.centennialpr.net on the large /18s and /19s and evdo<n>-<addr>.dynamic.centennialpr.net on 208.54.176.0/20. Static blocks plus an explicitly EV-DO-named dynamic pool is a mobile operator that also serves fixed and business customers.

Notable

• The prefixes are registered to Liberty Mobile Puerto Rico under the CENT-IP netname, with an old DIAL-UP-POOL block still registered to Centennial de Puerto Rico. Registrant and announcer are the same company across corporate name changes, which is history, not brokerage.
• One exception: 196.32.128.0/19 is registered to Optivon, Inc rather than to Liberty, yet its addresses carry centennialpr.net rDNS. The space is operationally Liberty's whatever the registry says.

Interesting

• The rDNS is an archaeology layer. centennialpr.net, evdo, and a dial-up pool record all survive two acquisitions on a network now selling LTE and fibre.

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

Announced prefixes

• 12.205.80.0/20
• 12.205.96.0/24
• 12.205.98.0/23
• 12.205.100.0/22
• 12.205.104.0/21
• 64.213.224.0/19
• 64.247.160.0/21
• 64.247.168.0/22
• 64.247.172.0/23
• 64.247.174.0/24
• 65.38.192.0/23
• 65.38.196.0/22
• 65.38.200.0/21
• 65.38.208.0/22
• 65.38.212.0/23
• 65.38.214.0/24
• 65.38.218.0/23
• 65.38.220.0/22
• 66.231.160.0/20
• 67.203.192.0/22
• 67.203.196.0/24
• 67.203.198.0/23
• 67.203.200.0/21
• 67.203.208.0/22
• 67.203.213.0/24
• 67.203.214.0/23
• 67.203.216.0/21
• 67.203.225.0/24
• 67.203.226.0/23
• 67.203.228.0/22
• 67.203.232.0/21
• 67.203.240.0/20
• 67.206.192.0/22
• 67.206.196.0/23
• 67.206.198.0/24
• 67.206.208.0/20
• 67.206.224.0/21
• 67.206.232.0/22
• 67.206.236.0/23
• 67.206.239.0/24
• 67.206.240.0/21
• 67.206.248.0/22
• 67.206.252.0/23
• 67.206.254.0/24
• 76.76.192.0/20
• 173.211.128.0/18
• 196.32.128.0/22
• 196.32.133.0/24
• 196.32.134.0/23
• 196.32.136.0/21
• 196.32.144.0/21
• 196.32.152.0/24
• 196.32.154.0/23
• 196.32.156.0/22
• 200.50.0.0/20
• 200.50.16.0/22
• 200.50.20.0/23
• 200.50.23.0/24
• 200.50.24.0/21
• 207.166.112.0/20
• 208.54.176.0/20
• 2607:f870::/32

Upstream networks

• AS7018 AT&T Enterprises, LLC
• AS23520 Columbus Networks USA, Inc.

Downstream networks

• AS14638 Liberty Communications of Puerto Rico LLC
• AS14974 Virtual Inc.
• AS11653 Puerto Rico Webmasters
• AS32189 SAGRADO
• AS401007 C&C Wireless Puerto Rico
• AS22888 Sistema Universitario Ana G. Mendez
• AS399599 G&B Networks Solutions
• AS394963 Multinational Life Insurance Company
• AS27021 Quest Diagnostics, Inc.
• AS54123 COSVI'S-ASSET MANAGEMENT CORP.
• AS395902 TRIPLE - S SALUD,INC
• AS62931 Plaza Las Americas, Inc.
• AS40311 ViaSat,Inc.
• AS40880 NAICOM CORPORATION
• AS27213 PRC Internet Corp
• AS35892 DREYFOUS & ASSOCIATES

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS23520 Columbus Networks USA, Inc.
• AS14638 Liberty Communications of Puerto Rico LLC
• AS14974 Virtual Inc.
• AS11653 Puerto Rico Webmasters
• AS32189 SAGRADO
• AS401007 C&C Wireless Puerto Rico
• AS22888 Sistema Universitario Ana G. Mendez
• AS399599 G&B Networks Solutions
• AS394963 Multinational Life Insurance Company
• AS27021 Quest Diagnostics, Inc.
• AS54123 COSVI'S-ASSET MANAGEMENT CORP.
• AS395902 TRIPLE - S SALUD,INC
• AS62931 Plaza Las Americas, Inc.
• AS40880 NAICOM CORPORATION
• AS40311 ViaSat,Inc.
• AS27213 PRC Internet Corp
• AS35892 DREYFOUS & ASSOCIATES