172.81.108.0/24

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 no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
172.81.108.2	AS400618 Prime Security Corp.	`0.32ms` from Singapore, SG

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
45.137.55.8	AS202656 Ivanov Vitaliy Sergeevich	`0.45ms` from Amsterdam, NL
42.101.58.184	AS137698 Haerbing , Heilongjiang Province, P.R.China.	`1.92ms` from Harbin, CN
45.61.214.40	AS53587 AZURE TECHNOLOGY CO., LIMITED	`0.34ms` from Los Angeles, US
180.110.153.232	AS134756 CHINANET Nanjing Jishan IDC network	`1.13ms` from Nanjing, CN
176.50.1.168	AS12389 PJSC Rostelecom	`5.71ms` from Novosibirsk, RU
160.86.103.216	AS2527 Sony Network Communications Inc.	`4.06ms` from Osaka, JP
188.47.79.216	AS5617 Orange Polska Spolka Akcyjna	`5.96ms` from Poznan, PL
104.53.208.120	AS7018 AT&T Enterprises, LLC	`8.86ms` from San Antonio, US
75.236.193.136	AS6167 Verizon Business	`10.81ms` from Atlanta, US
175.11.170.24	AS4134 CHINANET-BACKBONE	`2.10ms` from Changsha, CN
207.161.164.248	AS7122 Bell Canada	`16.32ms` from Chicago, US
84.132.157.152	AS3320 Deutsche Telekom AG	`4.23ms` from Duesseldorf, DE
90.100.172.168	AS3215 Orange S.A.	`13.09ms` from Frankfurt am Main, DE
217.228.152.248	AS3320 Deutsche Telekom AG	`7.78ms` from Frankfurt am Main, DE
122.35.207.136	AS17858 LG POWERCOMM	`4.74ms` from Incheon, KR
161.38.137.24	AS11976 Fidelity Communication International Inc.	`13.87ms` from Kansas City, US
18.169.45.248	AS16509 Amazon.com, Inc.	`0.17ms` from London, GB
172.187.120.136	AS8075 Microsoft Corporation	`0.21ms` from London, GB
188.127.107.168	AS42560 Telemach BH d.o.o. Sarajevo	`5.26ms` from Novi Travnik, BA
14.65.142.24	AS4766 Korea Telecom	`2.55ms` from Seoul, KR
39.125.93.8	AS9318 SK Broadband Co Ltd	`0.94ms` from Seoul, KR
120.118.70.152	AS1659 Taiwan Academic Network (TANet) Information Center	`5.19ms` from Taichung, TW
120.6.109.200	AS4837 CHINA UNICOM China169 Backbone	`9.36ms` from Tianjin, CN
80.140.19.56	AS3320 Deutsche Telekom AG	`2.08ms` from Berlin, DE
222.254.191.248	AS45899 VNPT Corp	`1.91ms` from Ho Chi Minh City, VN

Traceroute

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

traceroute -a -n -q1 172.81.108.118

traceroute to 172.81.108.118 (172.81.108.118): 64 hops max, 52 byte packets

1 [AS15169] 72.14.232.209 272.206 ms

2 *

3 *

4 *

5 [AS400618] 172.81.108.118 193.122 ms

Measurement taken from

IPinfo ProbeNet in Tel Aviv, IL

On January 19th 2026

What are IP address ranges?

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