203.172.51.0/24

AS4750 · CS LOXINFO PUBLIC COMPANY LIMITED

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Summary

Country	Thailand
Domain	csloxinfo.net
ASN	AS4750
Parent Range	203.172.48.0/22
Registry	APNIC
ID	WAN-CSLOXINFO

WHOIS Details

inetnum:        203.172.51.0 - 203.172.51.255
netname:        wan-csloxinfo
descr:          reassign to Wan IP for Corporate customer(Cloud)(/31)
descr:          contact ip_admin@csloxinfo.net
country:        TH
admin-c:        LIA1-AP
tech-c:         LIA1-AP
abuse-c:        AC1613-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         LOXINFO-IS
mnt-irt:        IRT-CSLOXINFO-TH
last-modified:  2021-01-20T01:51:32Z
source:         APNIC

irt:            IRT-CSLOXINFO-TH
address:        CW Tower
address:        Ratchadapisek Road, Huai Khwang, Bangkok 10310
phone:          +66 2 2638000
fax-no:         +66 2 2638790
e-mail:         csl-ip-admin@ais.co.th
abuse-mailbox:  csl-ip-admin@ais.co.th
admin-c:        LIA1-AP
tech-c:         LIA1-AP
auth:           # Filtered
remarks:        csl-ip-admin@ais.co.th was validated on 2025-09-04
mnt-by:         CSLOXINFO-IS
last-modified:  2025-11-18T10:47:13Z
source:         APNIC

role:           ABUSE CSLOXINFOTH
country:        ZZ
address:        CW Tower
address:        Ratchadapisek Road, Huai Khwang, Bangkok 10310
phone:          +66 2 2638000
e-mail:         csl-ip-admin@ais.co.th
admin-c:        LIA1-AP
tech-c:         LIA1-AP
nic-hdl:        AC1613-AP
remarks:        Generated from irt object IRT-CSLOXINFO-TH
remarks:        csl-ip-admin@ais.co.th was validated on 2025-09-04
abuse-mailbox:  csl-ip-admin@ais.co.th
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-04T22:49:47Z
source:         APNIC

role:           Loxinfo IP Admins
remarks:        CS LOXINFO PUBLIC COMPANY LIMITED
address:        CW Tower
address:        Ratchadapisek Road, Huai Khwang, Bangkok 10310
country:        TH
phone:          +66-2263-8000
fax-no:         +66-2263-8790
e-mail:         csl-ip-admin@ais.co.th
admin-c:        LIA1-AP
tech-c:         LIA1-AP
nic-hdl:        LIA1-AP
mnt-by:         CSLOXINFO-IS
last-modified:  2026-01-12T02:24:09Z
source:         APNIC

route:          203.172.51.0/24
origin:         AS4750
descr:          CS Loxinfo Public Company Limited 90 CW Tower A 17-20th floor Ratchadapisek Rd Huai Kwang
mnt-by:         LOXINFO-IS
last-modified:  2025-05-29T00:38:58Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 203.172.51.0/24

Range	ASN	Company	Num of IPs
203.172.48.0/22	AS4750	CS Loxinfo Public Company Limited	1,024

Nearby Ranges

BGP prefixes that overlap with 203.172.0.0/16

Range	ASN	Company	Num of IPs
203.172.128.0/17	AS23974	Ministry of Education - EMISC	32,768
203.172.0.0/19	AS7629	VITRO INC.	8,192
203.172.16.0/20	AS7629	VITRO INC.	4,096
203.172.40.0/22	AS9891	CS Loxinfo Public Company Limited	1,024
203.172.48.0/22	AS4750	CS Loxinfo Public Company Limited	1,024
203.172.64.0/22	AS4750	CS LoxInfo Public COmpany Limited	1,024
203.172.114.0/23	AS4750	CS LoxInfo Public COmpany Limited	512
203.172.46.0/23	AS4750	CS Loxinfo Public Company Limited	512
203.172.59.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.63.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.89.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.90.0/24	AS45458	Blue Worth_Corporate Internet	256
203.172.91.0/24	AS45458	Blue Worth_Corporate Internet	256
203.172.109.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.110.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.116.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.119.0/24	AS4750	reassign to Loopback for BN at The Cloud	256
203.172.126.0/24	AS4750	reassign to Renaissance Bangkok Hotel Ratchaprasong	256
203.172.36.0/24	AS4750	reassign to Wan IP for Corporate customer(Cloud)	256
203.172.37.0/24	AS4750	reassign to Wan IP for Corporate customer(Cloud)	256
203.172.38.0/24	AS4750	reassign to CSLOXINFO-IDC	256
203.172.39.0/24	AS4750	reassign to WHA INFONITE CO.,Ltd.	256
203.172.45.0/24	AS4750	CS Loxinfo Public Company Limited	256
203.172.53.0/24	AS4750	CS Loxinfo Public Company Limited	256
203.172.54.0/24	AS4750	CS Loxinfo Public Company Limited	256
203.172.58.0/24	AS4750	CS Loxinfo Public Company Limited	256
203.172.60.0/24	AS4750	reassign to Wan IP for Bangkok(Cyberworld)	256
203.172.61.0/24	AS4750	reassign to Corporate Wan for Cyberworld	256
203.172.62.0/24	AS4750	CS Loxinfo Public Company Limited	256
203.172.69.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.70.0/24	AS4750	reassign to Management for service broadband	256
203.172.71.0/24	AS4750	reassign to Management for service broadband	256
203.172.78.0/24	AS4750	reassign to Hyatt Place Sukhumvit Bangkok (Pioneer Property Co., Ltd )	256
203.172.79.0/24	AS4750	reassign to Wan IP for Corporate customer(Cloud)(/31)	256
203.172.73.0/24	AS137392	reassign to KTB Securities (Thailand) Co., Ltd.	256
203.172.93.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.95.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.88.0/24	AS4750	CS LoxInfo Public COmpany Limited	256
203.172.108.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.111.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.112.0/24	AS45458	reassign to ¸£ ¸° ¸š ¸š mass mail marketing	256
203.172.117.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.44.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.52.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.172.55.0/24	AS45458	Advanced Wireless Network Company Limited	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

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

IP Address	ASN	Details
203.172.51.166	AS4750 CS LOXINFO PUBLIC COMPANY LIMITED	`0.69ms` from Bangkok, TH

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
20.127.205.248	AS8075 Microsoft Corporation	`0.65ms` from Ashburn, US
20.254.154.232	AS8075 Microsoft Corporation	`0.17ms` from Cardiff, GB
75.48.51.136	AS7018 AT&T Enterprises, LLC	`7.60ms` from Chicago, US
47.189.57.72	AS5650 Frontier Communications of America, Inc.	`0.95ms` from Dallas, US
14.188.110.168	AS45899 VNPT Corp	`1.96ms` from Hanoi, VN
171.236.37.216	AS7552 Viettel Group	`10.55ms` from Ho Chi Minh City, VN
60.49.179.72	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`5.39ms` from Kuala Lumpur, MY
86.162.166.216	AS2856 British Telecommunications PLC	`2.45ms` from London, GB
45.168.99.8	AS268044 MJB TELECOMUNICAÇÕES LTDA ME	`4.16ms` from Novo Hamburgo, BR
177.196.30.152	AS26599 TELEFÔNICA BRASIL S.A	`2.03ms` from Osasco, BR
27.199.131.88	AS4837 CHINA UNICOM China169 Backbone	`9.12ms` from Qingdao, CN
210.104.191.120	AS4766 Korea Telecom	`5.36ms` from Seoul, KR
121.160.239.40	AS4766 Korea Telecom	`1.21ms` from Seoul, KR
49.57.238.56	AS4766 Korea Telecom	`1.28ms` from Seoul, KR
101.35.146.168	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.78ms` from Shanghai, CN
52.130.59.104	AS58593 Shanghai Blue Cloud Technology Co.,Ltd	`2.37ms` from Shanghai, CN
206.196.111.152	AS6428 CDM	`0.85ms` from St. Louis, US
60.125.215.120	AS17676 SoftBank Corp.	`2.59ms` from Tokyo, JP
44.251.246.104	AS16509 Amazon.com, Inc.	`0.52ms` from Boardman, US
196.251.63.120	AS328471 HERO TELECOMS (PTY) LTD	`2.72ms` from Cape Town, ZA
209.182.173.136	AS13628 AMERISOURCEBERGEN	`2.78ms` from Dallas, US
93.207.90.40	AS3320 Deutsche Telekom AG	`1.88ms` from Frankfurt am Main, DE
104.70.125.136	AS16625 Akamai Technologies, Inc.	`0.15ms` from Hamburg, DE
101.255.37.152	AS38511 PT Remala Abadi	`0.70ms` from Jakarta, ID
47.180.212.216	AS5650 Frontier Communications of America, Inc.	`3.82ms` from Los Angeles, US

Traceroute

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

traceroute -a -n -q1 -f2 203.172.51.166

traceroute to 203.172.51.166 (203.172.51.166): 64 hops max, 52 byte packets

2 [] 203.159.68.108 2.332 ms

3 [AS4750] 203.170.172.94 3.557 ms

4 [AS4750] 203.170.200.54 0.601 ms

5 [AS4750] 203.172.51.166 0.695 ms

Measurement taken from

IPinfo ProbeNet in Bangkok, TH

On January 19th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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