172.81.111.0/24

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
172.81.64.0/20	AS13760	Uniti Fiber Holdings Inc.	4,096
172.81.160.0/20	AS14265	TPx Communications	4,096
172.81.176.0/21	AS394745	Lunanode Hosting Inc.	2,048
172.81.176.0/21	AS394745	Lunanode Hosting Inc.	2,048
172.81.120.0/21	AS21859	Zenlayer 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
172.81.140.0/22	AS36498	Access One Inc.	1,024
172.81.4.0/22	AS30417	BTIG LLC	1,024
172.81.136.0/22	AS32924	Greenway Health, LLC	1,024
172.81.44.0/22	AS399290	Infinilink Broadband	1,024
172.81.48.0/22	AS19740	LINKSECURED LLC	1,024
172.81.52.0/22	AS396107	Southern Broadband, LLC	1,024
172.81.148.0/22	AS63023	Sardis Telecom	1,024
172.81.152.0/22	AS54858	Wave Broadband	1,024
172.81.24.0/22	AS19528	QUESTHOST.COM, LLC	1,024
172.81.20.0/22	AS399091	Inter Data Link Inc	1,024
172.81.156.0/22	AS14265	TPx Communications	1,024
172.81.188.0/22	AS32354	Unwired	1,024
172.81.116.0/22	AS54641	InMotion Hosting, Inc.	1,024
172.81.28.0/22	AS399194	Satronics Satellites Sales and Service	1,024
172.81.16.0/22	AS18519	MTC Technologies	1,024
172.81.38.0/23	AS397095	Setson LLC	512
172.81.9.0/24	AS46480	Pekin Insurance	256
172.81.127.0/24	AS21859	ZENLA-1	256
172.81.127.0/24	AS21859	ZENLA-1	256
172.81.127.0/24	AS62610	ZENLA-1	256
172.81.127.0/24	AS62610	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
172.81.139.0/24	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
172.81.36.0/24	AS399218	R B & W CORPORATION OF CANADA	256
172.81.37.0/24	AS62943	DataTenant, LLC	256
172.81.4.0/24	AS30417	BTIG LLC	256
172.81.57.0/24	AS399275	SOLID-PHOENIX	256
172.81.59.0/24	AS399275	SOLID SYSTEMS LLC	256
172.81.75.0/24	AS36730	Transformyx, Inc.	256
172.81.8.0/24	AS7819	Ark Network, Inc.	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
172.81.111.226	ai98.de	1
172.81.111.198	rfcbalance.sbs	1

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
172.81.111.202	AS400618 Prime Security Corp.	`0.13ms` 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
8.30.16.104	AS3356 Level 3 Parent, LLC	`2.72ms` from Ashburn, US
186.27.220.40	AS10299 EMPRESAS MUNICIPALES DE CALI E.I.C.E. E.S.P.	`9.53ms` from Bogota, CO
45.16.18.104	AS7018 AT&T Enterprises, LLC	`13.88ms` from Dallas, US
86.17.169.56	AS5089 Virgin Media Limited	`6.26ms` from London, GB
2.126.23.152	AS5607 Sky UK Limited	`3.60ms` from London, GB
35.243.0.200	AS396982 Google LLC	`0.23ms` from Los Angeles, US
186.221.48.88	AS28573 Claro NXT Telecomunicacoes Ltda	`1.72ms` from Rio de Janeiro, BR
83.171.243.216	AS43350 NForce Entertainment B.V.	`0.14ms` from Roosendaal, NL
222.96.17.248	AS4766 Korea Telecom	`6.29ms` from Seoul, KR
36.75.50.232	AS7713 PT Telekomunikasi Indonesia	`8.51ms` from Surabaya, ID
118.170.216.104	AS3462 Data Communication Business Group	`1.34ms` from Taichung, TW
3.113.198.104	AS16509 Amazon.com, Inc.	`0.30ms` from Tokyo, JP
126.39.128.120	AS17676 SoftBank Corp.	`5.30ms` from Tokyo, JP
91.238.92.232	AS198584 PIO-Hosting GmbH	`0.07ms` from Amsterdam, NL
114.115.151.88	AS23724 IDC, China Telecommunications Corporation	`3.81ms` from Beijing, CN
1.94.196.232	AS55990 Huawei Cloud Service data center	`3.62ms` from Beijing, CN
195.122.177.184	AS3356 Level 3 Parent, LLC	`0.29ms` from Frankfurt am Main, DE
14.249.72.88	AS45899 VNPT Corp	`5.16ms` from Hanoi, VN
113.238.97.200	AS4837 CHINA UNICOM China169 Backbone	`10.45ms` from Liaoyang, CN
81.98.199.40	AS5089 Virgin Media Limited	`8.81ms` from London, GB
75.82.206.120	AS20001 Charter Communications Inc	`5.24ms` from Los Angeles, US
196.115.66.136	AS36925 MEDITELECOM	`17.99ms` from Madrid, ES
16.51.157.24	AS16509 Amazon.com, Inc.	`0.61ms` from Melbourne, AU
76.101.158.8	AS7922 Comcast Cable Communications, LLC	`8.86ms` from Miami, US
80.21.56.136	AS3269 Telecom Italia S.p.A.	`9.62ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -f2 172.81.111.200

traceroute to 172.81.111.200 (172.81.111.200): 64 hops max, 52 byte packets

2 [AS23961] 156.0.200.52 0.093 ms

3 [AS400618] 172.81.111.200 0.138 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On September 11th 2025

What are IP address ranges?

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