Autonomous system
AS62523 CIRBN-LLC
Residential ARIN
Summary
Central Illinois Regional Broadband Network
isp fiber regional us
CIRBN-LLC is operated by CIRBN, LLC, the Central Illinois Regional Broadband Network.
What it's used for
- The address space carries residential and institutional traffic, evidenced by reverse DNS entries like
user-254-C.ms.k12.il.usand netnames such asMRSYSTEMSWIRELESSandICN2. - The AS announces 16,640 IPv4 addresses across 14 prefixes and 1 IPv6 prefix, while maintaining 18 observed neighbours; this ratio indicates a regional access network rather than a transit provider.
- Traffic consists of high-speed fiber internet for residential customers, as well as connectivity for K-12 school districts, healthcare organizations, and government entities in Central Illinois.
Notable
- Registrants include CIRBN, LLC, Gridley Communications, Cogent Communications, LLC, MR Systems Wireless, LLC, Illinois Century Network, and BOLD-EUREKACOLLEGE, reflecting a mix of owned and leased infrastructure.
- The inventory includes diverse netnames such as
CL-214andCOGENT-A, indicating the aggregation of multiple legacy or partner networks under the CIRBN umbrella. - The address inventory is fragmented across various /20, /22, and /24 blocks, consistent with a regional ISP that has grown through acquisitions and partnerships.
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
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Chicago | Chicago, United States | 2001:504:0:4:0:6:2523:1 |
| DE-CIX Chicago | Chicago, United States | 149.112.11.91 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 14 prefixes · 16.64K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 15 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS62523- Registry name
- CIRBN-LLC
- Registrant
- CIRBN, LLC
- Abuse contact
- abuse@cirbn.org
- Registered
- 2013-06-21
- Last changed
- 2013-06-21
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 68% valid · 13 valid, 6 with no ROA
- ROAs
- 14 authorising AS62523
- ASPA
- 3 declared providers
- IRR
- 100% registered · 19 of 19 announcements
- Route objects
- 33 naming AS62523
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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