asn.dev

Autonomous system

AS21559 OSNET

Unclassified ARIN

IPv4 addresses 31.49K 46 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly PR
Exchanges 6 recorded by PCH
Upstreams 8 36 downstream
Flagged prefixes 0 none

Summary

OSNET

Puerto Rico · AI-generated

isp residential puerto-rico wireless

OSNET is operated by OSNET, a Puerto Rican internet service provider.

What it's used for

  • The address space carries residential and business internet services in Puerto Rico, evidenced by netnames such as OSNET-CGNT-NET-1, OSNET, and OSNET-1.
  • With 31,488 IPv4 addresses announced across 46 prefixes and 81 observed neighbours, the ratio suggests a regional access network providing connectivity to end-users rather than a major transit provider.

Notable

  • Registrants include OSNET, Cogent Communications, LLC, American Registry for Internet Numbers, and TLD of Puerto Rico, indicating a mix of owned and leased address space.
  • The address inventory is fragmented into many small prefixes, including /22s and /23s, consistent with a local ISP managing diverse customer segments.

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

Recorded at 6 exchanges in 3 countries, largest first.

ExchangeLocationTheir address
IX.br (PTT.br) São PauloSão Paulo, Brazil187.16.208.186
Equinix Internet Exchange AshburnAshburn, United States206.126.236.82
FL-IX - The Florida Internet Exchange / Community IX - FloridaMiami, United States206.41.108.159
Equinix Internet Exchange MiamiMiami, United States198.32.243.54
Puerto Rico Internet ExchangeSan Juan, Puerto Rico204.138.0.136
Equinix-LA(former Paix)Los Angeles, United States198.32.243.54

Transit providers

8 upstream, 36 downstream and 71 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6939Hurricane Electric LLC2,140
AS174Cogent Communications, LLC317
AS3257GTT Communications Inc.159
AS6762TELECOM ITALIA SPARKLE S.p.A.65
AS24482SG.GS39
AS3303Swisscom (Schweiz) AG38
AS37721Virtual Technologies & Solutions38
AS1299Arelion Sweden AB11

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 46 prefixes · 31.49K addresses IPv6 1 prefixes

CountryNamePrefixes
PRPuerto Rico47

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21559
Registry name
OSNET
Registrant
OSNET
Abuse contact
abuse@osnetpr.com
Registered
2010-07-07
Last changed
2013-06-28
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
65% valid · 28 valid, 15 with no ROA
ROAs
18 authorising AS21559
ASPA
no ASPA record
IRR
100% registered · 43 of 43 announcements
Route objects
76 naming AS21559

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: 440 networks and 1,773 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