Autonomous system
AS13482 ZWEIG-DIMENNA
Unclassified ARIN
Summary
Zweig-DiMenna Associates
finance business enterprise
ZWEIG-BLK-A implies a block B that was planned and never registered.
What it's used for
- An investment management firm's network. 2,048 addresses in one IPv4 prefix,
216.163.160.0/21, three observed BGP neighbours, and no IPv6 announced.
Notable
- The block is netname
ZWEIG-BLK-A, registered to the firm. - The registrant string ends with a full stop after the legal form,
Associates, LLC.. - Three addresses were queried for reverse DNS and none returned a name.
Interesting
- Lettering a block
Ais somebody expecting more of them. Whether B ever arrived is not visible from here, but the intent is: the naming scheme was designed for a series and the series stopped at one. - A /21 is large for a firm of this kind, and it dates the request. Address space was granted on stated need in an era when nobody was counting closely, and what an organisation asked for then it still holds now.
- Three upstreams, and none of the sampled addresses answering, is a network built for outbound reliability rather than inbound service. Trading systems need the path out to stay up; nothing here needs to be found by name from outside.
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.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, 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 · 2.05K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13482- Registry name
- ZWEIG-DIMENNA
- Registrant
- Zweig-DiMenna Associates, LLC.
- Abuse contact
- kmckenna@zweig-dimenna.com
- Registered
- 1999-06-17
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS13482
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 2 naming AS13482
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 1,783 prefixes, as published 2026-10-17. 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