172.81.106.0/23

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

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
50.122.80.55	AS5650 Frontier Communications of America, Inc.	`15.71ms` from Chicago, US
3.13.51.55	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
117.6.192.87	AS7552 Viettel Group	`2.08ms` from Hanoi, VN
103.165.39.55	AS17995 PT iForte Global Internet	`0.69ms` from Jakarta, ID
204.56.18.39	AS55154 Madgenius.com	`0.46ms` from Minneapolis, US
166.1.13.7	AS401152 Ace Data Centers II, L.L.C.	`0.09ms` from Orem, US
109.94.38.71	AS39886 STELOGY INFRASTRUCTURE	`4.61ms` from Paris, FR
18.209.77.103	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
99.66.105.87	AS7018 AT&T Enterprises, LLC	`5.67ms` from San Antonio, US
182.212.194.119	AS17858 LG POWERCOMM	`1.92ms` from Seoul, KR
59.187.178.183	AS3786 LG DACOM Corporation	`6.68ms` from Seoul, KR
112.164.80.151	AS4766 Korea Telecom	`6.44ms` from Seoul, KR
42.188.50.87	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`6.05ms` from Singapore, SG
78.61.24.39	AS8764 Telia Lietuva, AB	`3.35ms` from Vilnius, LT
84.155.9.199	AS3320 Deutsche Telekom AG	`6.43ms` from Frankfurt am Main, DE
176.109.208.39	AS15943 wilhelm.tel GmbH	`0.44ms` from Hamburg, DE
180.87.219.151	AS136907 HUAWEI CLOUDS	`0.87ms` from Hong Kong, HK
16.163.73.215	AS16509 Amazon.com, Inc.	`0.12ms` from Hong Kong, HK
67.124.182.199	AS7018 AT&T Enterprises, LLC	`1.73ms` from Los Angeles, US
34.154.34.135	AS396982 Google LLC	`0.11ms` from Milan, IT
176.210.250.151	AS12389 PJSC Rostelecom	`8.98ms` from Novosibirsk, RU
64.33.47.183	AS24255 Koshinomiyako Network, Inc.	`4.10ms` from Osaka, JP
18.229.230.215	AS16509 Amazon.com, Inc.	`0.16ms` from Osasco, BR
190.141.19.247	AS18809 Cable Onda	`9.06ms` from Panama, PA
97.230.248.7	AS6167 Verizon Business	`15.69ms` from Atlanta, US

Traceroute

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

traceroute -a -n -q1 -m5 172.81.107.161

traceroute to 172.81.107.161 (172.81.107.161): 5 hops max, 52 byte packets

1 [AS7806] 204.27.195.252 2.341 ms

2 [AS7806] 216.229.23.44 3.632 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Lincoln, US

On January 30th 2026

What are IP address ranges?

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