asn.dev

Autonomous system

AS40668 FENWAL-INCORPORATED - Fenwal, Inc.

Unclassified APNIC

IPv4 addresses 512 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Fenwal, Inc.

United States of America · AI-generated

business pharmaceutical corporate internal

FENWAL-INCORPORATED is held by Fenwal, Inc.

What it's used for

  • The space carries corporate infrastructure for a pharmaceutical manufacturer, identified by the netname FENWAL-NET and registrant Fenwal, Inc.
  • The inventory consists of 512 IPv4 addresses within a single prefix (208.88.0.0/23) and 0 IPv6 prefixes, observed against 1 neighbour, indicating a small, self-contained internal network rather than a transit or access provider.
  • Traffic from this AS represents internal corporate operations for a subsidiary of Fresenius Kabi, including office workers and internal systems supporting pharmaceutical manufacturing and distribution.

Notable

  • The registrant Fenwal, Inc. matches the AS holder and netname FENWAL-NET, confirming consistent ownership.
  • Fenwal, Inc. was acquired by Fresenius Kabi in 2012, transitioning from an independent entity to a subsidiary of the German healthcare group.
  • The address inventory is a single contiguous /23 block, typical of a corporate estate allocated for internal use.

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

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS33491Comcast Cable Communications, LLC118

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, 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 1 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS40668
Registry name
FENWAL-INCORPORATED
Registrant
Fenwal, Inc.
Abuse contact
FDT_GI_Network@fresenius.com
Registered
2008-02-25
Last changed
2012-02-24
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS40668
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
1 naming AS40668

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: 454 networks and 1,852 prefixes, as published 2026-11-08. 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