203.170.221.0/24

AS133481 · AIS Fibre

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Summary

Country	Thailand
Domain	csl.co.th
ASN	AS133481
Registry	APNIC
ID	CSL-SME-BB-TH

WHOIS Details

inetnum:        203.170.221.0 - 203.170.221.255
netname:        CSL-SME-BB-TH
descr:          reassign to CSL SME Broadband
descr:          contact ip_admin@csl.co.th
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:  2021-01-20T01:55:02Z
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:          203.170.221.0/24
origin:         AS133481
descr:          CS Loxinfo Public Company Limited 90 CW Tower A 17-20th floor Ratchadapisek Rd Huai Kwang
mnt-by:         Loxinfo-IS
last-modified:  2025-05-29T00:32:01Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.170.0.0/16

Range	ASN	Company	Num of IPs
203.170.96.0/19	AS9569	kt HCN Co.,Ltd.	8,192
203.170.112.0/20	AS9569	HYUNDAI HCN Seocho Cable Tv System Co.Ltd	4,096
203.170.32.0/20	AS10000	Nagasaki Cable Media Inc.	4,096
203.170.80.0/21	AS38719	Dreamscape Networks PTY LTD	2,048
203.170.164.0/22	AS4750	CS Loxinfo Public Company Limited	1,024
203.170.248.0/22	AS4750	CS Loxinfo Public Company Limited	1,024
203.170.16.0/22	AS45533	The Comptroller General's Department	1,024
203.170.52.0/22	AS3491	PCCW Global Japan corporation.	1,024
203.170.240.0/22	AS4750	CS Loxinfo Public Company Limited	1,024
203.170.172.0/22	AS4750	CS Loxinfo Public Company Limited	1,024
203.170.108.0/22	AS9569	HYUNDAI HCN Seocho Cable Tv System Co.Ltd	1,024
203.170.160.0/23	AS9891	CS Loxinfo Public Company Limited	512
203.170.88.0/23	AS45437	Real World Technology Solutions Pty Ltd	512
203.170.50.0/23	AS23883	Movaci Co., Ltd	512
203.170.98.0/23	AS9569	HYUNDAI HCN Seocho Cable Tv System Co.Ltd	512
203.170.192.0/23	AS9891	CS Loxinfo Public Company Limited	512
203.170.26.0/23	AS38247	Vietnamobile Telecommunications Joint Stock Company	512
203.170.146.0/23	AS4750	CS Loxinfo Public Company Limited	512
203.170.241.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.240.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.217.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.223.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.229.0/24	AS38444	reassign to Advanced Info Service	256
203.170.228.0/24	AS38444	reassign to Advanced Info Service	256
203.170.230.0/24	AS38444	reassign to Advanced Info Service	256
203.170.231.0/24	AS38444	reassign to Advanced Info Service	256
203.170.222.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.216.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.131.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.137.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.209.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.199.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.194.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.185.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.171.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.56.0/24	AS23838	Network Pro	256
203.170.220.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.213.0/24	AS133481	reassign to CSL SME Broadband	256
203.170.179.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.168.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.191.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.155.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.196.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.48.0/24	AS17912	EPAM SYSTEMS INDIA PRIVATE LIMITED	256
203.170.210.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.214.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.225.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.227.0/24	AS45458	Advanced Wireless Network Company Limited	256
203.170.153.0/24	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

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

IP Address	ASN	Details
203.170.221.1	AS133481 AIS Fibre	`5.32ms` 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
108.48.29.88	AS701 Verizon Business	`2.12ms` from Ashburn, US
146.232.96.104	AS2018 TENET (The UNINET Project)	`2.67ms` from Cape Town, ZA
18.159.87.184	AS16509 Amazon.com, Inc.	`0.14ms` from Frankfurt am Main, DE
106.53.133.216	AS45090 Shenzhen Tencent Computer Systems Company Limited	`2.19ms` from Guangzhou, CN
72.235.203.88	AS36149 Hawaiian Telcom Services Company, Inc.	`6.43ms` from Honolulu, US
41.175.148.24	AS30844 Liquid Telecommunications Ltd	`0.25ms` from Johannesburg, ZA
34.104.5.200	AS396982 Google LLC	`0.13ms` from Montreal, CA
69.119.179.56	AS6128 Cablevision Systems Corp.	`5.96ms` from New York City, US
60.92.1.40	AS17676 SoftBank Corp.	`3.67ms` from Osaka, JP
153.201.217.232	AS4713 NTT DOCOMO BUSINESS,Inc.	`5.03ms` from Osaka, JP
20.19.246.88	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
73.25.107.8	AS7922 Comcast Cable Communications, LLC	`2.12ms` from Portland, US
47.103.51.152	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.14ms` from Shanghai, CN
184.25.64.40	AS16625 Akamai Technologies, Inc.	`0.10ms` from Toronto, CA
47.253.206.72	AS45102 Alibaba (US) Technology Co., Ltd.	`0.30ms` from Ashburn, US
51.8.118.56	AS8075 Microsoft Corporation	`0.58ms` from Ashburn, US
122.168.203.200	AS24560 Bharti Airtel Ltd., Telemedia Services	`8.98ms` from Delhi, IN
167.160.6.200	AS200845 AVATEL TELECOM, SA	`8.82ms` from Madrid, ES
62.43.66.232	AS6739 VODAFONE ONO, S.A.	`9.29ms` from Madrid, ES
107.170.114.152	AS14061 DigitalOcean, LLC	`0.72ms` from New York City, US
75.231.205.72	AS6167 Verizon Business	`11.56ms` from Portland, US
209.126.144.24	AS10439 CariNet, Inc.	`0.59ms` from San Diego, US
108.217.46.152	AS7018 AT&T Enterprises, LLC	`11.07ms` from Atlanta, US
13.247.239.184	AS16509 Amazon.com, Inc.	`0.15ms` from Cape Town, ZA
199.4.134.136	AS395580 Central College	`11.59ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 203.170.221.1

traceroute to 203.170.221.1 (203.170.221.1): 64 hops max, 52 byte packets

1 [AS23884] 103.76.182.1 14.015 ms

2 *

3 [AS45458] 103.48.12.65 0.89 ms

4 *

5 [AS133481] 49.228.4.57 2.058 ms

6 [AS133481] 49.228.4.99 1.669 ms

7 [AS133481] 58.64.61.1 4.288 ms

8 [AS133481] 203.170.221.1 4.875 ms

Measurement taken from

IPinfo ProbeNet in Bangkok, TH

On February 7th 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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