asn.dev

Autonomous system

AS21509 APOLLONYC

Unclassified ARIN

IPv4 addresses 2.56K 8 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 6 0 downstream
Flagged prefixes 0 none

Summary

Apollo Global Management

United States of America · AI-generated

business corporate finance internal

APOLLONYC is the autonomous system for Apollo Global Management, a major American alternative asset manager.

What it's used for

  • The address space carries internal corporate infrastructure, evidenced by netnames such as APOLLOLP-18, APOLLO-NET1, and APOLLO-MANAGEMENT-LP-UKNET1.
  • The AS announces 2560 IPv4 addresses across 8 prefixes with 7 observed neighbours, a ratio consistent with a segmented internal corporate estate rather than a public access or transit network.

Notable

  • Registrants largely align with the announcer, including Apollo Management, L.P., APOLLO GLOBAL MANAGEMENT, and Apollo Management LP, though some blocks retain legacy registrants like CenturyLink Communications, LLC and IRT-QWEST-ASIA-PACIFIC-HK1.
  • The inventory consists of eight distinct IPv4 prefixes, including a /23 block and several /24s, with no IPv6 prefixes announced.
  • Reverse DNS entries for some addresses point to qwest.net, reflecting the historical origin of the address space before consolidation under Apollo.

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

6 upstream, 0 downstream and 6 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3356Level 3 Parent, LLC359
AS3910CenturyLink Communications, LLC120
AS3257GTT Communications Inc.60
AS17762Tata Teleservices Maharashtra Ltd33
AS9498BHARTI Airtel Ltd.27
AS5580GTT Communications Netherlands B.V.1

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 8 prefixes · 2.56K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America8

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21509
Registry name
APOLLONYC
Registrant
Apollo Management, L.P.
Abuse contact
internetops@apollolp.com
Registered
2001-05-14
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
10% valid · 1 valid, 9 with no ROA
ROAs
1 authorising AS21509
ASPA
no ASPA record
IRR
0% registered · 0 of 10 announcements
Route objects
0 naming AS21509

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: 442 networks and 1,771 prefixes, as published 2026-10-15. 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