asn.dev

Autonomous system

AS25831 -Reserved AS-

Unclassified ARIN

IPv4 addresses 8.45K 6 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Prefix Network

United States of America · AI-generated

leased ipx sky vocus

AS25831 is operated by Prefix Network LLC.

What it's used for

  • The address space carries leased IP blocks, with netnames including SKY-LEASED-IPXO and NETUTILS, and one block registered to Vocus_Group_Limited.
  • The AS announces 8192 IPv4 addresses across 5 prefixes with only 1 observed neighbour, indicating a role focused on IP leasing or aggregation rather than transit or access.

Notable

  • Registrants differ from the announcer, including Sky UK Limited, Internet Utilities NA LLC, and RIPE Admin, consistent with a model of leasing address space to third parties.
  • The inventory consists of five distinct IPv4 prefixes with no IPv6 announcements, reflecting a purely IPv4 leasing portfolio.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS396356Latitude.sh295
AS214937Eleven Holdings Limited58

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 6 prefixes · 8.45K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America6

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS25831
Registry name
PREFIX NETWORK
Registrant
Prefix Network LLC
Abuse contact
jim@prefix.uy
Registered
2025-12-09
Last changed
2025-12-09
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 6 valid, 0 with no ROA
ROAs
6 authorising AS25831
ASPA
no ASPA record
IRR
100% registered · 6 of 6 announcements
Route objects
12 naming AS25831

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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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

Cross-check