172.81.104.0/24

AS400618 · Prime Security Corp.

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Summary

Country	Hong Kong
Domain	ctcsci.com
ASN	AS400618
Registry	ARIN
ID	CTCSCI

WHOIS Details

NetHandle:      NET-172-81-104-0-1
OrgID:          C10193922
Parent:         NET-172-81-96-0-1
NetName:        CTCSCI
NetRange:       172.81.104.0 - 172.81.111.255
NetType:        reassignment
RegDate:        2023-09-25
Updated:        2023-11-30
Source:         ARIN


OrgID:          C10193922
OrgName:        CTCSCI TECH LIMITED
CanAllocate:    
Street:         RM 023, 9/F BLK G KWAI SHING IND BLDG, 42-46
Street:         TAI LIN PAI RD, KWAI CHUNG
City:           New Territories
State/Prov:     
Country:        HK
PostalCode:     
RegDate:        2023-09-25
Updated:        2023-09-25
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 172.81.0.0/16

Range	ASN	Company	Num of IPs
172.81.192.0/18	AS45090	Tencent Cloud Computing (Beijing) Co., Ltd	16,384
172.81.64.0/20	AS32592	Uniti Fiber Holdings Inc.	4,096
172.81.160.0/20	AS14265	TPx Communications	4,096
172.81.64.0/20	AS13760	Uniti Fiber Holdings Inc.	4,096
172.81.120.0/21	AS21859	Zenlayer Inc	2,048
172.81.176.0/21	AS394745	Lunanode Hosting Inc.	2,048
172.81.176.0/21	AS394745	Lunanode Hosting Inc.	2,048
172.81.176.0/21	AS174	Lunanode Hosting Inc.	2,048
172.81.176.0/21	AS174	Lunanode Hosting Inc.	2,048
172.81.16.0/22	AS18519	MTC Technologies	1,024
172.81.24.0/22	AS19528	QUESTHOST.COM, LLC	1,024
172.81.4.0/22	AS30417	BTIG LLC	1,024
172.81.188.0/22	AS32354	Unwired	1,024
172.81.140.0/22	AS36498	Access One Inc.	1,024
172.81.52.0/22	AS396107	Southern Broadband, LLC	1,024
172.81.20.0/22	AS399091	Inter Data Link Inc	1,024
172.81.28.0/22	AS399194	Satronics Satellites Sales and Service	1,024
172.81.32.0/22	AS17303	Netwire	1,024
172.81.116.0/22	AS54641	InMotion Hosting, Inc.	1,024
172.81.152.0/22	AS54858	Wave Broadband	1,024
172.81.148.0/22	AS1097	Sardis Telecom	1,024
172.81.156.0/22	AS14265	TPx Communications	1,024
172.81.100.0/23	AS140227	Hong Kong Communications International Co., Limited	512
172.81.38.0/23	AS397095	Setson LLC	512
172.81.8.0/24	AS7819	Ark Network, Inc.	256
172.81.139.0/24	AS16509	Greenway Health, LLC	256
172.81.144.0/24	AS212238	bvoip	256
172.81.145.0/24	AS212238	bvoip	256
172.81.146.0/24	AS212238	bvoip	256
172.81.147.0/24	AS212238	bvoip	256
172.81.127.0/24	AS21859	ZENLA-1	256
172.81.127.0/24	AS21859	ZENLA-1	256
172.81.128.0/24	AS27176	DataWagon, LLC	256
172.81.129.0/24	AS27176	DataWagon, LLC	256
172.81.131.0/24	AS27176	DataWagon, LLC	256
172.81.134.0/24	AS27176	DataWagon, LLC	256
172.81.135.0/24	AS27176	DataWagon, LLC	256
172.81.4.0/24	AS30417	BTIG LLC	256
172.81.75.0/24	AS36730	Transformyx, Inc.	256
172.81.36.0/24	AS399218	R B & W CORPORATION OF CANADA	256
172.81.57.0/24	AS399275	SOLID-PHOENIX	256
172.81.59.0/24	AS399275	SOLID SYSTEMS LLC	256
172.81.9.0/24	AS46480	Pekin Insurance	256
172.81.127.0/24	AS62610	ZENLA-1	256
172.81.127.0/24	AS62610	ZENLA-1	256
172.81.37.0/24	AS62943	DataTenant, LLC	256

Hosted domains

There are 2 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.81.104.248	jooncheung.ltd	1
172.81.104.89	bitbest-kr.com	1

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
172.81.104.206	AS400618 Prime Security Corp.	`0.36ms` 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
43.229.71.8	AS132280 Symphony Communication (Thailand) PCL.	`0.88ms` from Bangkok, TH
54.68.39.120	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
89.182.25.40	AS13045 htp GmbH	`6.71ms` from Frankfurt am Main, DE
101.71.56.8	AS4837 CHINA UNICOM China169 Backbone	`5.05ms` from Hangzhou, CN
113.164.167.152	AS45899 VNPT Corp	`2.53ms` from Hanoi, VN
112.7.192.120	AS24444 Shandong Mobile Communication Company Limited	`4.92ms` from Jinan, CN
3.9.96.168	AS16509 Amazon.com, Inc.	`0.14ms` from London, GB
2.123.81.120	AS5607 Sky UK Limited	`3.68ms` from London, GB
20.26.148.72	AS8075 Microsoft Corporation	`0.21ms` from London, GB
104.34.146.152	AS20001 Charter Communications Inc	`3.87ms` from Los Angeles, US
180.196.8.232	AS18126 Chubu Telecommunications Company, Inc.	`4.29ms` from Osaka, JP
56.125.117.168	AS16509 Amazon.com, Inc.	`0.20ms` from Osasco, BR
4.239.16.152	AS8075 Microsoft Corporation	`0.17ms` from Quebec, CA
177.196.171.152	AS26599 TELEFÔNICA BRASIL S.A	`13.14ms` from São Paulo, BR
114.36.94.232	AS3462 Data Communication Business Group	`1.96ms` from Taipei, TW
175.172.200.24	AS4837 CHINA UNICOM China169 Backbone	`8.27ms` from Tieling, CN
121.3.181.136	AS2527 Sony Network Communications Inc.	`2.73ms` from Tokyo, JP
86.82.162.216	AS1136 KPN B.V.	`2.93ms` from Amsterdam, NL
81.169.23.248	AS5432 Proximus NV	`16.04ms` from Brussels, BE
34.71.69.152	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
129.118.203.136	AS10421 Texas Tech University	`10.04ms` from Dallas, US
52.189.18.72	AS8075 Microsoft Corporation	`0.20ms` from Des Moines, US
79.241.203.8	AS3320 Deutsche Telekom AG	`5.24ms` from Duesseldorf, DE
139.15.117.200	AS9183 Robert Bosch Gesellschaft mit Beschraenkter Haftung	`4.16ms` from Frankfurt am Main, DE
117.5.211.248	AS7552 Viettel Group	`1.36ms` from Hanoi, VN

Traceroute

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

traceroute -a -n -q1 -f2 172.81.104.39

traceroute to 172.81.104.39 (172.81.104.39): 64 hops max, 52 byte packets

2 [AS3356] 4.69.208.58 162.909 ms

3 *

4 *

5 *

6 *

7 [AS400618] 172.81.104.39 163.87 ms

Measurement taken from

IPinfo ProbeNet in Billings, US

On January 30th 2026

What are IP address ranges?

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