asn.dev

Autonomous system

AS18042 KBT Koos Broadband Telecom

Unclassified APNIC

IPv4 addresses 123K 5 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly TW
Exchanges 0 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

Koos Broadband Telecom

Taiwan, Province of China · AI-generated

residential isp cable taiwan

The AS handle KBT Koos Broadband Telecom is held by Koos Broadband Telecom.

What it's used for

  • The address space carries residential broadband traffic, evidenced by reverse DNS entries such as 58.86-127-host255.kbtelecom.net.tw and 61-67-191-host255.kbtelecom.net.tw.
  • The network announces 123,136 IPv4 addresses across 5 prefixes and 1 IPv6 prefix, with only 3 observed neighbours, indicating an access or eyeball network role rather than transit.

Notable

  • Registrants include IRT-KBT-TW for the KBT-NET netnames and TWNIC Whois Administrator for TWNIC-TW blocks, with one prefix registered to IRT-CHINALIFE-TW under the CHINALIFE-NET netname.
  • The inventory consists of a mix of /16, /17, /18, /19, and /24 prefixes, with the largest block being 58.86.0.0/16.

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

1 upstream, 1 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS9416Hoshin Multimedia Center Inc.426

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-12, 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 5 prefixes · 123K addresses IPv6 1 prefixes

CountryNamePrefixes
TWTaiwan, Province of China6

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS18042
Registry name
KBT
Abuse contact
jacky.ni@homeplus.net.tw
Registered
2008-09-04
Last changed
2025-11-06
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 7 valid, 0 with no ROA
ROAs
53 authorising AS18042
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
974 naming AS18042

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: 436 networks and 1,769 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

Cross-check