203.188.80.0/21

AS4158 · City University of Hong Kong

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Summary

Country	Hong Kong
Domain	cityu.edu.hk
ASN	AS4158
Registry	APNIC
ID	CITYU-HK

WHOIS Details

inetnum:        203.188.80.0 - 203.188.91.255
netname:        CITYU-HK
country:        HK
descr:          City University of Hong Kong
admin-c:        CK273-AP
tech-c:         CK273-AP
status:         ASSIGNED NON-PORTABLE
changed:        cwy@cc.hku.hk 20040504
mnt-by:         MAINT-JUCC-AP
source:         APNIC

person:         Chi Yuen Kwok
nic-hdl:        CK273-AP
e-mail:         cccykwok@cityu.edu.hk
address:        City University of Hong Kong
address:        83 Tat Chee Avenue
address:        Kowloon
address:        Hong Kong
phone:          +852-34426253
fax-no:         +852-27888281
country:        HK
changed:        cwy@cc.hku.hk 20040504
mnt-by:         MAINT-HK-CITY-UNI
source:         APNIC

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
111.206.96.149	AS4808 China Unicom Beijing Province Network	`3.66ms` from Beijing, CN
5.149.137.101	AS6696 VERIXI SA	`0.65ms` from Brussels, BE
50.127.125.245	AS5650 Frontier Communications of America, Inc.	`9.71ms` from Chicago, US
73.102.213.149	AS7922 Comcast Cable Communications, LLC	`10.76ms` from Chicago, US
136.49.13.149	AS16591 Google Fiber Inc.	`5.19ms` from Dallas, US
14.184.181.133	AS45899 VNPT Corp	`4.60ms` from Ho Chi Minh City, VN
31.51.0.85	AS2856 British Telecommunications PLC	`3.54ms` from London, GB
89.44.40.69	AS56478 Hyperoptic Ltd	`1.29ms` from London, GB
70.173.169.5	AS22773 Cox Communications Inc.	`9.80ms` from Los Angeles, US
79.58.58.117	AS3269 Telecom Italia S.p.A.	`7.20ms` from Milan, IT
210.153.249.5	AS2514 NTT PC Communications, Inc.	`0.54ms` from Osaka, JP
187.109.169.37	AS263579 ISUPER TELECOMUNICACOES INFO LTDA	`10.88ms` from Osasco, BR
200.145.78.229	AS53166 UNIVERSIDADE ESTADUAL PAULISTA	`5.44ms` from Osasco, BR
44.251.113.149	AS16509 Amazon.com, Inc.	`4.91ms` from Portland, US
71.198.68.245	AS7922 Comcast Cable Communications, LLC	`6.25ms` from San Jose, US
110.43.134.5	AS4811 China Telecom (Group)	`3.81ms` from Shanghai, CN
34.87.113.213	AS396982 Google LLC	`0.13ms` from Singapore, SG
220.244.30.133	AS7545 TPG Telecom Limited	`0.54ms` from Sydney, AU
113.146.165.213	AS2516 KDDI CORPORATION	`2.62ms` from Tokyo, JP
73.237.223.229	AS7922 Comcast Cable Communications, LLC	`4.29ms` from Atlanta, US
50.200.31.181	AS7922 Comcast Cable Communications, LLC	`1.43ms` from Boston, US
77.54.84.37	AS12353 Vodafone Portugal	`7.00ms` from Lisbon, PT
176.28.121.117	AS16371 acens Technologies, S.L.	`1.08ms` from Madrid, ES
200.35.35.197	AS13489 UNE EPM TELECOMUNICACIONES S.A.	`4.36ms` from Medellin, CO
98.231.39.149	AS7922 Comcast Cable Communications, LLC	`12.11ms` from Miami, US

Traceroute

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

traceroute -a -n -q1 -f6 -m11 203.188.80.173

traceroute to 203.188.80.173 (203.188.80.173): 11 hops max, 52 byte packets

6 [AS16509] 52.93.157.247 198.781 ms

7 [AS16509] 13.248.55.131 188.285 ms

8 [AS4158] 144.214.138.1 194.698 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Columbus, US

On August 28th 2025

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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