asn.dev

Autonomous system

AS18126 CTCX Chubu Telecommunications Company, Inc.

Residential APNIC

IPv4 addresses 1.51M 45 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 6 recorded by PCH
Upstreams 9 1 downstream
Flagged prefixes 0 none

Summary

Chubu Telecommunications Company

Japan · AI-generated

residential isp japan access

The AS handle CTCX is held by Chubu Telecommunications Company, Inc.

What it's used for

  • The address space carries residential and business access traffic, evidenced by reverse DNS entries such as area2b.commufa.jp and area61a.commufa.jp.
  • The network announces 1,505,536 IPv4 addresses across 45 prefixes and 2 IPv6 prefixes, with 24 observed neighbours, indicating a large access network serving end-users.

Notable

  • Registrants for the largest prefixes are listed as Japan Network Information Center with netnames commufa-CIDR-BLK-JP and KDDI-CIDR-BLK-JP, reflecting the historical allocation of this space.
  • The address inventory is extensive, including large blocks like 115.36.0.0/14 and 180.196.0.0/14, consistent with a major regional ISP.

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

Recorded at 6 exchanges in 1 country, largest first.

ExchangeLocationTheir address
BroadBand Internet eXchange TokyoTokyo, Japan101.203.88.179
JPIX TokyoTokyo, Japan210.171.224.217
BroadBand Internet eXchange OsakaOsaka, Japan218.100.9.191
Equinix Internet Exchange TokyoTokyo, Japan2001:de8:5::1:8126:1
JPIX OsakaOsaka, Japan103.246.232.217
Equinix Internet Exchange OsakaOsaka, Japan203.190.227.47

Transit providers

9 upstream, 1 downstream and 16 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS2914NTT America, Inc.967
AS174Cogent Communications, LLC803
AS2497Internet Initiative Japan Inc.579
AS2519ARTERIA Networks Corporation508
AS6939Hurricane Electric LLC508
AS2516KDDI CORPORATION231
AS24482SG.GS65
AS17639Converge ICT Solutions Inc.62

All 9 upstreams →

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

Shape and geography

IPv4 45 prefixes · 1.51M addresses IPv6 2 prefixes

CountryNamePrefixes
JPJapan47

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS18126
Registry name
CTCX
Abuse contact
hostmaster@nic.ad.jp
Registered
2002-03-21
Last changed
2006-11-09
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
60% valid · 39 valid, 26 with no ROA
ROAs
30 authorising AS18126
ASPA
no ASPA record
IRR
100% registered · 65 of 65 announcements
Route objects
100 naming AS18126

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: 431 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

Cross-check