Autonomous system
AS26738 DEERFIELD
Unclassified ARIN
Summary
Deerfield Partners
business private financial
DEERFIELD is the autonomous system handle for Deerfield Partners, L.P.
What it's used for
- The single announced prefix 38.105.163.0/24 carries the netname
COGENT-Aand is registered to Cogent Communications, LLC, indicating the space is leased or allocated from Cogent's inventory. - With 256 IPv4 addresses announced against only 2 observed neighbours, the ratio suggests a small, private corporate estate rather than a public transit or access network.
Notable
- The RDAP registrant for the announced prefix is Cogent Communications, LLC, which differs from the AS holder Deerfield Partners, L.P., consistent with a leased address block.
- The address inventory consists of a single /24 block, representing a minimal footprint typical of a private corporate network.
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 2026-10-26, 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 · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS26738- Registry name
- DEERFIELD
- Registrant
- Deerfield Partners, L.P.
- Abuse contact
- ITSupport@deerfieldpartners.com
- Registered
- 2002-11-13
- Last changed
- 2017-09-22
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS26738
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS26738
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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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