asn.dev

Autonomous system

AS33583 IBC-FGIS

Unclassified ARIN Enterprise

IPv4 addresses 768 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Isabella Bank Corporation

United States of America · AI-generated

banking enterprise us financial

The AS handle IBC-FGIS is held by Isabella Bank Corporation.

What it's used for

  • The address space carries the internal network infrastructure for a financial services holding company, as indicated by the registrant name and netname IBC-FGIS.
  • The inventory consists of 768 IPv4 addresses across 2 prefixes, with 2 observed neighbours, implying a small, self-contained enterprise network rather than a transit or access provider.

Notable

  • The registrants for both announced prefixes, 199.30.148.0/23 and 199.30.150.0/24, are listed as Isabella Bank Corporation, matching the AS holder.
  • The address inventory is finely subdivided into two small blocks, consistent with an internal corporate estate segmented for specific site or departmental 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

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS26271CMSInter.net LLC183
AS22974Charter Communications LLC12

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-19, 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 2 prefixes · 768 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS33583
Registry name
IBC-FGIS
Registrant
Isabella Bank Corporation
Abuse contact
ITServices@isabellabank.com
Registered
2010-10-04
Last changed
2012-02-24
Allocation
assigned

Declared

PeeringDB profile

self-reported
Name
IBC-FGIS
Network type
Enterprise
Scope
Not Disclosed
Traffic ratio
Not Disclosed
Peering policy
Selective
Website
https://isabellabank.com

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS33583
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
4 naming AS33583

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 2026-10-20. 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