Autonomous system
AS13821 ACML
Unclassified ARIN
Summary
AllianceBernstein
finance business enterprise
Blocks from three regional registries in one AS, and two of them carry a contact type the third does not have.
What it's used for
- An investment management firm's network. 4,608 addresses across 13 IPv4 prefixes, 13 observed BGP neighbours, and no IPv6 announced.
Notable
- Eleven blocks are netname
ALLIANCE-NY, registered to the firm. 103.216.134.0/24is netnameABAL-AUand165.101.85.0/24isAJL-JP, each ending in a country code.- Both of those carry an incident response team object, a field the American records do not use.
- The Australian block's registrant capitalises the company differently from every other record here.
- Its administrator field names a predecessor company rather than the current one.
- Eighteen addresses were queried for reverse DNS and none returned a name.
Interesting
- A firm operating in three registry regions ends up with three record formats for the same organisation. The two overseas objects name a team responsible for handling abuse reports, which is required there and optional elsewhere, so the same company is documented to two different standards.
- A predecessor name surviving in an administrator field, next to the current name in the registrant field, dates that object to before a merger and shows only half of it was updated.
- Thirteen upstreams for four and a half thousand addresses is a firm buying paths rather than space.
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
14 upstream, 0 downstream and 14 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 13 prefixes · 4.61K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 13 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13821- Registry name
- ACML
- Registrant
- AllianceBernstein L.P.
- Abuse contact
- GETS-CommunicationsEngineering@alliancebernstein.com
- Registered
- 1999-08-23
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 88% valid · 15 valid, 2 with no ROA
- ROAs
- 15 authorising AS13821
- ASPA
- no ASPA record
- IRR
- 82% registered · 14 of 17 announcements 1 other origin
- Route objects
- 24 naming AS13821
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 1,781 prefixes, as published 2026-10-16. 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