asn.dev

Autonomous system

AS21646 FISHER

Unclassified ARIN

IPv4 addresses 3.33K 13 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 5 0 downstream
Flagged prefixes 0 none

Summary

Fisher Investments

United States of America · AI-generated

business finance corporate

The AS handle FISHER is operated by Fisher Investments Inc., a private investment management firm.

What it's used for

  • The address space carries internal corporate infrastructure, evidenced by netnames referencing specific office locations such as PLANO, CAMAS, and EQIX-SEATTLE, as well as service-specific names like fsmtp3.fisherinvestmentsevents.com.
  • With 13 IPv4 prefixes covering 3328 addresses and only 6 observed neighbours, the ratio indicates a small, self-contained corporate estate rather than a transit or access provider.

Notable

  • Registrants are consistent with the announcer, listing variations of "Fisher Investments Inc." across most prefixes, though one block (204.199.211.0/24) is registered to CTL Costa Rica.
  • The inventory consists of 13 distinct /24 blocks, many of which appear to be leased or allocated for specific data center or office sites, reflecting a fragmented but internally managed 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

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

5 upstream, 0 downstream and 5 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3257GTT Communications Inc.679
AS3356Level 3 Parent, LLC48
AS6461Zayo Bandwidth17
AS7018AT&T Enterprises, LLC12
AS262197MILLICOM CABLE COSTA RICA S.A.7

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

Shape and geography

IPv4 13 prefixes · 3.33K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America13

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21646
Registry name
FISHER
Registrant
Fisher Investments Inc.
Abuse contact
jo.wolfe@fi.com
Registered
2001-06-04
Last changed
2012-02-24
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
15% valid · 2 valid, 11 with no ROA
ROAs
3 authorising AS21646
ASPA
no ASPA record
IRR
23% registered · 3 of 13 announcements
Route objects
4 naming AS21646

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 1,782 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

Cross-check