1. All IP Ranges
  2. 183.0.0.0/8
  3. 183.91.0.0/16
  4. AS23764  | 183.91.51.0/24

183.91.51.0/24

AS23764  ·  CTGNet

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Summary

Country Hong Kong
Domain chinatelecom.com.hk
ASN AS23764
Parent Range 183.91.48.0/21
Registry APNIC
ID CTHKI-HK

WHOIS Details

inetnum:        183.91.48.0 - 183.91.51.255
netname:        CTHKI-HK
descr:          Chinatelecom Next Carrying HongKong region network
country:        HK
admin-c:        CTHK1-AP
tech-c:         CTHK1-AP
abuse-c:        AC2015-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-CTHKI-HK
mnt-lower:      MAINT-CTHKI-HK
mnt-routes:     MAINT-CTHKI-HK
mnt-irt:        IRT-CTHKI-HK
last-modified:  2021-01-26T21:27:41Z
source:         APNIC

irt:            IRT-CTHKI-HK
address:        38/F., DAH SING Financial Center, 108 Gloucester Road, Wan Chai, Hong Kong
e-mail:         guohf@chinatelecomglobal.com
abuse-mailbox:  guohf@chinatelecomglobal.com
admin-c:        CTHK1-AP
tech-c:         CTHK1-AP
auth:           # Filtered
remarks:        noc@chinatelecomglobal.com
remarks:        guohf@chinatelecomglobal.com was validated on 2025-06-11
mnt-by:         MAINT-CTHKI-ADMIN
last-modified:  2025-06-11T03:05:20Z
source:         APNIC

role:           ABUSE CTHKIHK
country:        ZZ
address:        38/F., DAH SING Financial Center, 108 Gloucester Road, Wan Chai, Hong Kong
phone:          +000000000
e-mail:         guohf@chinatelecomglobal.com
admin-c:        CTHK1-AP
tech-c:         CTHK1-AP
nic-hdl:        AC2015-AP
remarks:        Generated from irt object IRT-CTHKI-HK
remarks:        guohf@chinatelecomglobal.com was validated on 2025-06-11
abuse-mailbox:  guohf@chinatelecomglobal.com
mnt-by:         APNIC-ABUSE
last-modified:  2025-06-11T03:05:40Z
source:         APNIC

role:           CHINA TELECOM HONG KONGINTERNATIONAL LTD  - netw
address:        38/F., DAH SING Financial Center, 108 Gloucester Road, Wan Chai, Hong Kong
country:        HK
phone:          +852 31000000
e-mail:         noc@chinatelecom.com.hk
admin-c:        CTHK1-AP
tech-c:         CTHK1-AP
nic-hdl:        CTHK1-AP
mnt-by:         MAINT-CTHKI-HK
last-modified:  2009-11-24T04:46:50Z
source:         APNIC

route:          183.91.48.0/21
origin:         AS23764
descr:          China Telecom Global Limited 28/F, Everbright Center 108 Gloucester Road
mnt-by:         MAINT-CTGL-HK
last-modified:  2021-06-17T08:24:35Z
source:         APNIC

route:          183.91.48.0/21
descr:          Chinatelecom Next Carrying Network Backbone
descr:          HK
origin:         AS4809
country:        HK
notify:         noc@chinatelecomglobal.com
mnt-routes:     MAINT-CTGL-HK
mnt-by:         MAINT-CTGL-HK
last-modified:  2014-07-14T10:08:14Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 183.91.51.0/24

Range ASN Company Num of IPs
183.91.48.0/21 AS4809 Chinatelecom Next Carrying HongKong region network 2,048

Nearby Ranges

BGP prefixes that overlap with 183.91.0.0/16

Range ASN Company Num of IPs
183.91.192.0/18 AS9976 Namincheon Brodcasting Co., Ltd. 16,384
183.91.96.0/19 AS18278 Cable TV Corporation 8,192
183.91.16.0/20 AS45903 CMC Telecom Infrastructure Company 4,096
183.91.144.0/20 AS10212 China Enterprise ICT Solutions Limited 4,096
183.91.0.0/20 AS45903 CMC Telecom Infrastructure Company 4,096
183.91.16.0/21 AS45903 CMC Telecom Infrastructure Company 2,048
183.91.184.0/21 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 2,048
183.91.152.0/21 AS10212 China Enterprise ICT Solutions Limited 2,048
183.91.24.0/21 AS45903 CMC Telecom Infrastructure Company 2,048
183.91.8.0/21 AS45903 CMC Telecom Infrastructure Company 2,048
183.91.48.0/21 AS4809 Chinatelecom Next Carrying HongKong region network 2,048
183.91.40.0/21 AS4134 CHINANET HongKong region network 2,048
183.91.24.0/22 AS45903 CMC Telecom Infrastructure Company 1,024
183.91.188.0/22 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 1,024
183.91.20.0/22 AS45903 CMC Telecom Infrastructure Company 1,024
183.91.132.0/22 AS45170 GPO BOX 13655 1,024
183.91.184.0/22 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 1,024
183.91.4.0/22 AS45903 CMC Telecom Infrastructure Company 1,024
183.91.28.0/22 AS45903 CMC Telecom Infrastructure Company 1,024
183.91.8.0/22 AS45903 CMC Telecom Infrastructure Company 1,024
183.91.30.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.0.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.8.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.12.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.6.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.26.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.2.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.28.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.20.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.22.0/23 AS45903 CMC Telecom Infrastructure Company 512
183.91.179.0/24 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 256
183.91.11.0/24 AS45903 CMC Telecom Infrastructure Company 256
183.91.89.0/24 AS4800 APLIKANUSA LINTASARTA 256
183.91.77.0/24 AS4800 TUGU PRATAMA INDONESIA 256
183.91.78.0/24 AS4800 LINTAS MEDIA DANAWA 256
183.91.84.0/24 AS4800 INFINITIUM SOLUTIONS 256
183.91.23.0/24 AS45903 CMC Telecom Infrastructure Company 256
183.91.80.0/24 AS4800 INTERNATIONAL ORGANIZATION FOR MIGRATION 256
183.91.176.0/24 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 256
183.91.0.0/24 AS45903 CMC Telecom Infrastructure Company 256
183.91.22.0/24 AS45903 CMC Telecom Infrastructure Company 256
183.91.52.0/24 AS4809 Chinatelecom Next Carrying HongKong region network 256
183.91.68.0/24 AS4800 ADHI KARYA 256
183.91.69.0/24 AS4800 UNILEVER INDONESIA TBK 256
183.91.4.0/24 AS45903 CMC Telecom Infrastructure Company 256
183.91.178.0/24 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 256
183.91.56.0/24 AS4134 Chinatelecom Next Carrying HongKong region network 256
183.91.177.0/24 AS131127 GLOBAL TECHNOLOGY - TELECOMMUNICATIONS CORPORATION 256
183.91.27.0/24 AS45903 CMC Telecom Infrastructure Company 256
183.91.18.0/24 AS45903 CMC Telecom Infrastructure Company 256

Hosted domains

There are no domains currently hosted on this ASN.

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Pingable IPs

13 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
183.91.51.1 AS23764 CTGNet 1.01ms from Hong Kong, HK

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
193.232.40.104 AS62240 Clouvider 0.20ms from Amsterdam, NL
85.90.22.152 AS39440 netplusFR SA 3.10ms from Geneve, CH
187.140.89.168 AS8151 UNINET 5.42ms from Guadalajara, MX
194.85.27.8 AS9157 Federal State Budget Institution The Special Astrophysical Observatory of Russia's Academy of Sciences 9.05ms from Krasnodar, RU
46.201.49.168 AS6849 JSC "Ukrtelecom" 8.82ms from Kyiv, UA
83.204.113.184 AS3215 Orange S.A. 10.20ms from Lyon, FR
77.208.40.24 AS12430 VODAFONE ESPANA S.A.U. 16.25ms from Madrid, ES
23.118.188.40 AS7018 AT&T Enterprises, LLC 2.55ms from Miami, US
195.39.17.8 AS13036 T-Mobile Czech Republic a.s. 1.45ms from Prague, CZ
14.64.8.8 AS4766 Korea Telecom 1.83ms from Seoul, KR
175.214.116.184 AS4766 Korea Telecom 1.20ms from Seoul, KR
39.115.114.136 AS9318 SK Broadband Co Ltd 0.85ms from Seoul, KR
153.174.117.120 AS4713 NTT Communications Corporation 3.60ms from Tokyo, JP
4.204.192.24 AS8075 Microsoft Corporation 0.17ms from Toronto, CA
73.82.65.24 AS7922 Comcast Cable Communications, LLC 1.48ms from Atlanta, US
97.95.44.248 AS20115 Charter Communications LLC 11.05ms from Chicago, US
169.59.200.56 AS36351 IBM Cloud 0.78ms from Dallas, US
78.43.64.104 AS3209 Vodafone GmbH 11.57ms from Frankfurt am Main, DE
78.146.180.200 AS13285 TalkTalk Communications Limited 6.09ms from London, GB
178.62.37.232 AS14061 DigitalOcean, LLC 0.30ms from London, GB
92.41.181.200 AS206067 Hutchison 3G UK Limited 7.86ms from London, GB
90.196.11.72 AS5607 Sky UK Limited 1.31ms from London, GB
146.112.132.24 AS36692 Cisco OpenDNS, LLC 0.69ms from Melbourne, AU
95.249.169.136 AS3269 Telecom Italia S.p.A. 6.14ms from Milan, IT
24.118.199.8 AS7922 Comcast Cable Communications, LLC 7.75ms from Minneapolis, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f2 183.91.51.1
traceroute to 183.91.51.1 (183.91.51.1): 64 hops max, 52 byte packets
2 [AS3549] 200.186.63.117 27.464 ms
3 *
4 [AS3356] 4.71.141.82 364.547 ms
5 *
6 [AS23764] 183.91.51.1 367.372 ms
Measurement taken from IPinfo ProbeNet in Rio de Janeiro, BR
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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