Autonomous system
AS14957 PREPA-UUNT1
Unclassified ARIN
Summary
Puerto Rico Electric Power Authority
government infrastructure business
The electric utility for an entire island, announcing 256 addresses through one upstream.
What it's used for
- A public power authority's network. 256 addresses in a single IPv4 prefix, with one observed BGP neighbour and no IPv6 announced.
Notable
- The whole footprint is
66.129.166.0/24, carrying the netnameFROM-PREPANET. - That netname begins with a preposition, which reads as half of a sentence somebody never finished.
- The AS handle joins the authority's initials to an abbreviated carrier name.
- Three addresses were queried for reverse DNS and none returned a name.
Interesting
- A netname starting with a word like this one usually comes from a transfer note: space moved from one network to another, and the phrase describing the move became the name. Registry fields keep whatever was typed, including the half-thoughts.
- One upstream and one small block for the utility that powers an island is the fact worth pausing on. The systems that run generation and distribution are not on the public internet, and should not be, but everything that connects this authority to the outside world runs through a single link.
- The carrier name in the AS handle belongs to a company that has been absorbed more than once since the handle was assigned, which dates the record without needing a timestamp.
- Nothing published in reverse DNS is the right answer for an operator of critical infrastructure, and it is consistent across the whole sample.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS23550 | HUB Advanced Networks, LLC | 58 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PR | Puerto Rico | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS14957- Registry name
- PREPA-UUNT1
- Registrant
- Puerto Rico Electric Power Authority
- Abuse contact
- noc@prepanetworks.net
- Registered
- 2010-07-15
- Last changed
- 2023-10-31
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS14957
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 2 naming AS14957
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: 445 networks and 1,817 prefixes, as published 2026-10-27. 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