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
172.81.160.0/20	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
172.81.111.226	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

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

IP Address	ASN	Details
172.81.111.203	AS400618 Prime Security Corp.	`0.11ms` 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
92.71.121.104	AS22773 Cox Communications Inc.	`2.16ms` from Ashburn, US
169.62.20.152	AS36351 IBM Cloud	`0.66ms` from Ashburn, US
1.119.203.40	AS4847 China Networks Inter-Exchange	`3.96ms` from Beijing, CN
18.189.163.88	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
144.69.66.24	AS36351 IBM Cloud	`0.91ms` from Dallas, US
88.65.51.104	AS3209 Vodafone GmbH	`2.97ms` from Frankfurt am Main, DE
113.77.24.184	AS4134 CHINANET-BACKBONE	`3.85ms` from Guangzhou, CN
154.93.241.200	AS134548 DXTL Tseung Kwan O Service	`0.69ms` from Hong Kong, HK
208.107.135.168	AS11232 Midcontinent Communications	`2.30ms` from Kansas City, US
92.27.57.72	AS13285 TalkTalk Communications Limited	`2.50ms` from London, GB
217.36.11.24	AS2856 British Telecommunications PLC	`9.33ms` from London, GB
162.231.196.24	AS7018 AT&T Enterprises, LLC	`15.64ms` from Los Angeles, US
73.62.109.104	AS7922 Comcast Cable Communications, LLC	`5.97ms` from Miami, US
59.95.181.8	AS9829 National Internet Backbone	`5.63ms` from Mumbai, IN
111.58.140.104	AS9808 China Mobile Communications Group Co., Ltd.	`3.73ms` from Nanning, CN
81.219.199.184	AS12741 Netia SA	`5.12ms` from Poznan, PL
34.202.95.72	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
212.210.217.104	AS3269 Telecom Italia S.p.A.	`11.77ms` from Rome, IT
49.166.138.120	AS17858 LG POWERCOMM	`2.56ms` from Seoul, KR
49.29.132.88	AS4766 Korea Telecom	`6.77ms` from Seoul, KR
2.67.205.184	AS44034 Hi3G Access AB	`6.81ms` from Stockholm, SE
31.163.163.216	AS12389 PJSC Rostelecom	`8.09ms` from Yekaterinburg, RU
118.252.5.168	AS4134 CHINANET-BACKBONE	`4.29ms` from Changsha, CN
209.122.134.168	AS6079 RCN	`6.61ms` from Chicago, US
31.52.142.88	AS2856 British Telecommunications PLC	`2.10ms` from Erith, GB

Traceroute

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

traceroute -a -n -q1 -f2 172.81.111.202

traceroute to 172.81.111.202 (172.81.111.202): 64 hops max, 52 byte packets

2 [AS23961] 156.0.200.52 0.065 ms

3 [AS400618] 172.81.111.202 0.322 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On January 30th 2026

What are IP address ranges?

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