Autonomous system
AS19653 CTSTELECOM
Residential ARIN
Summary
CTS Communications
isp regional residential business
CTSTELECOM is the AS handle for CTS Communications Corp, a regional telecommunications provider based in Galesburg, Michigan.
What it's used for
- The address space carries residential and business access traffic, evidenced by reverse DNS entries such as
static.ctstelecom.net,gpon.dynamic.ctstelecom.net, andip.ctstelecom.net. - The AS announces 61,952 IPv4 addresses across 9 prefixes and maintains 27 observed neighbours, a ratio consistent with a regional access network providing last-mile connectivity.
Notable
- Registrants largely align with the announcer, with most prefixes registered to CTS Communications Corp, though specific blocks are registered to Kalamazoo College, City of Kalamazoo, and Kalamazoo Valley Community College.
- The address inventory includes a large /17 block (146.113.0.0/17) registered to Kalamazoo College, alongside smaller /20 and /24 blocks serving various local entities.
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 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.134 |
| Seattle Internet Exchange | Seattle, United States | 2001:504:16::4cc5 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.133 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 61.95K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 10 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19653- Registry name
- CTSTELECOM
- Registrant
- CTS Communications Corp
- Abuse contact
- abuse@metronetinc.com
- Registered
- 2001-01-29
- Last changed
- 2025-03-14
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 10 with no ROA
- ROAs
- 0 authorising AS19653
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 12 naming AS19653
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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