asn.dev

Autonomous system

AS23764 CTGNET CTGNet

Unclassified APNIC

IPv4 addresses 50.43K 121 prefixes
IPv6 prefixes 29 counted as prefixes, not addresses
Countries 1 mostly HK
Exchanges 40 recorded by PCH
Upstreams 55 179 downstream
Flagged prefixes 0 none

Summary

CTGNet

Hong Kong · AI-generated

transit telecom global chinatelecom

CTGNET is operated by China Telecom Global Limited.

What it's used for

  • The address space carries international and regional infrastructure for China Telecom, with netnames including CTGL-AP, UK-CHINATELECOM, and CTHKI-HK.
  • The AS announces 50,176 IPv4 addresses and 29 IPv6 prefixes, maintaining 555 observed neighbours; this high neighbour count relative to the address inventory indicates a transit or network service provider role.

Notable

  • Registrants include CHINA TELECOM GLOBAL LIMITED, CHINA TELECOM HONG KONGINTERNATIONAL LTD, China Telecom do Brasil Ltda., and China Telecom South Africa (Pty) Ltd., reflecting a global corporate estate.
  • The inventory consists of 122 IPv4 prefixes, with the largest blocks being /21s in the 202.55.0.0/16 and 203.196.0.0/16 ranges.

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 40 exchanges in 24 countries, largest first.

ExchangeLocationTheir address
IX.br (PTT.br) São PauloSão Paulo, Brazil187.16.214.84
DE-CIX FrankfurtFrankfurt, Germany80.81.196.114
LINX LON1London, United Kingdom195.66.224.40
AMS-IX AmsterdamAmsterdam, Netherlands80.249.209.95
Neutral Internet ExchangeAmsterdam, Netherlands193.239.118.168
NAPAfrica IX JohannesburgJohannesburg, South Africa196.60.10.214
France-IX ParisParis, France37.49.238.60
Equinix Internet Exchange SingaporeSingapore, Singapore27.111.229.59

All 40 exchanges →

Transit providers

55 upstream, 179 downstream and 420 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3356Level 3 Parent, LLC1,972
AS6939Hurricane Electric LLC1,707
AS1299Arelion Sweden AB869
AS34549meerfarbig GmbH & Co. KG737
AS2914NTT America, Inc.445
AS174Cogent Communications, LLC337
AS6762TELECOM ITALIA SPARKLE S.p.A.240
AS24482SG.GS210

All 55 upstreams →

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, 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 121 prefixes · 50.43K addresses IPv6 29 prefixes

CountryNamePrefixes
HKHong Kong150

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS23764
Registry name
CTGNet
Registrant
China Telecom Global Limited
Abuse contact
guohf@chinatelecomglobal.com
Registered
2020-06-12
Last changed
2020-07-20
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
94% valid · 199 valid, 12 with no ROA
ROAs
436 authorising AS23764
ASPA
no ASPA record
IRR
99.1% registered · 209 of 211 announcements 1 other origin
Route objects
7,209 naming AS23764

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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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