Autonomous system
AS11992 LIBERTY-MOB-
Unclassified ARIN
Summary
Liberty Mobile Puerto Rico Inc.
mobile isp legacy
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.neton the large/18s and/19s andevdo<n>-<addr>.dynamic.centennialpr.neton208.54.176.0/20. 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-IPnetname, with an oldDIAL-UP-POOLblock 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:
196.32.128.0/19is registered to Optivon, Inc rather than to Liberty, yet its addresses carrycentennialpr.netrDNS. 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 92 prefixes · 104K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PR | Puerto Rico | 93 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11992- Registry name
- LIBERTY-MOB-PR
- Registrant
- Liberty Mobile Puerto Rico Inc.
- Abuse contact
- noc@libertypr.com
- Registered
- 1999-02-23
- Last changed
- 2023-05-09
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 42 with no ROA
- ROAs
- 0 authorising AS11992
- ASPA
- no ASPA record
- IRR
- 90% registered · 38 of 42 announcements
- Route objects
- 14 naming AS11992
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,775 prefixes, as published 2026-10-11. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere