203.21.42.0/24

AS56118 · OCSC-TH

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Summary

Country	Thailand
Domain	ocsc.go.th
ASN	AS56118
Parent Range	203.21.42.0/23
Registry	APNIC
ID	OCSC-TH

WHOIS Details

inetnum:        203.21.42.0 - 203.21.43.255
netname:        OCSC-TH
descr:          47/111 Tiwanon Road
descr:          Talad kwan sub-district, Muang district
descr:          Nonthaburi, 11000, Thailand
country:        TH
org:            ORG-OOTC3-AP
admin-c:        WM1241-AP
tech-c:         WM1241-AP
abuse-c:        AO410-AP
status:         ASSIGNED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-routes:     MAINT-OCSC-TH
mnt-irt:        IRT-OCSC-TH
last-modified:  2023-01-30T03:09:47Z
source:         APNIC

irt:            IRT-OCSC-TH
address:        47/111 Tiwanon Road, Talad kwan sub-district, Muang district, Nonthaburi, 11000, Thailand.
e-mail:         watanyu@ocsc.go.th
abuse-mailbox:  watanyu@ocsc.go.th
admin-c:        WM1241-AP
tech-c:         WM1241-AP
auth:           # Filtered
remarks:        watanyu@ocsc.go.th was validated on 2025-10-15
mnt-by:         MAINT-OCSC-TH
last-modified:  2025-11-18T00:26:51Z
source:         APNIC

organisation:   ORG-OOTC3-AP
org-name:       Office of the Civil Service Commission (OCSC)
org-type:       LIR
country:        TH
address:        Office of the Civil Service Commission
address:        47/111 Tiwanon Road, Talad kwan sub-district,
address:        Muang district
phone:          +66-9-5757-2399
fax-no:         +66-2547-1081
e-mail:         watanyu@ocsc.go.th
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2026-01-22T13:07:06Z
source:         APNIC

role:           ABUSE OCSCTH
country:        ZZ
address:        47/111 Tiwanon Road, Talad kwan sub-district, Muang district, Nonthaburi, 11000, Thailand.
phone:          +000000000
e-mail:         watanyu@ocsc.go.th
admin-c:        WM1241-AP
tech-c:         WM1241-AP
nic-hdl:        AO410-AP
remarks:        Generated from irt object IRT-OCSC-TH
remarks:        watanyu@ocsc.go.th was validated on 2025-10-15
abuse-mailbox:  watanyu@ocsc.go.th
mnt-by:         APNIC-ABUSE
last-modified:  2025-10-15T00:48:22Z
source:         APNIC

person:         Watanyu Manataursiri
address:        47/111 Tiwanon Road, Talad kwan sub-district, Muang district, Nonthaburi, 11000, Thailand.
country:        TH
phone:          +66634-1-66634
e-mail:         watanyu@ocsc.go.th
nic-hdl:        WM1241-AP
mnt-by:         MAINT-OCSC-TH
last-modified:  2022-06-14T08:32:51Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 203.21.42.0/24

Range	ASN	Company	Num of IPs
203.21.42.0/23	AS56118	47/111 Tiwanon Road	512

Nearby Ranges

BGP prefixes that overlap with 203.21.0.0/16

Range	ASN	Company	Num of IPs
203.21.112.0/21	AS133612	VODAFONE AUSTRALIA PTY LIMITED	2,048
203.21.24.0/21	AS703	Verizon Australia PTY Limited	2,048
203.21.140.0/22	AS135409	Kacific Broadband Satellites Pte Ltd	1,024
203.21.108.0/22	AS133612	VODAFONE AUSTRALIA PTY LIMITED	1,024
203.21.150.0/23	AS137896	Hunter Water Corporation	512
203.21.128.0/23	AS2764	St. Vincent's Health & Aged Care Ltd.	512
203.21.130.0/23	AS10148	The University of Melbourne	512
203.21.42.0/23	AS56118	47/111 Tiwanon Road	512
203.21.76.0/23	AS38549	Viewbank Rise Networks	512
203.21.66.0/24	AS209854	Cyberzone S.A.	256
203.21.4.0/24	AS216053	Data Cloud Technology d.o.o Kragujevac	256
203.21.7.0/24	AS24448	Synamedia Technologies (India) Private Limited	256
203.21.79.0/24	AS2764	First Linear	256
203.21.72.0/24	AS395793	Mistic Internet Security Pty Ltd	256
203.21.125.0/24	AS45671	MailGuard Pty. Ltd.	256
203.21.20.0/24	AS4739	iiNet Limited	256
203.21.134.0/24	AS58716	Penrith City Council	256
203.21.5.0/24	AS7545	Micronica	256
203.21.78.0/24	AS7545	iiNet Limited	256
203.21.121.0/24	AS7575	Universities Australia	256
203.21.37.0/24	AS7575	Australian Academic and Research Network	256
203.21.83.0/24	AS7647	OnTheNet Pty Ltd	256
203.21.95.0/24	AS9009	Formosa Sydney Pty Limited	256
203.21.22.0/24	AS9266	Fiveways International Limited	256
203.21.207.0/24	AS10143	Infinet Group Pty Ltd	256
203.21.12.0/24	AS9650	CITEC	256
203.21.9.0/24	AS10143	OCTEC Incorporated	256
203.21.40.0/24	AS133015	City of Stirling	256
203.21.140.0/24	AS135409	Western Samoa Pool	256
203.21.65.0/24	AS154329	Phoenix Business Solutions Australia Pty Ltd	256
203.21.120.0/24	AS17882	Univision LLC	256
203.21.21.0/24	AS17889	Intraceptives Pty Ltd	256
203.21.104.0/24	AS18986	Calligo (Canada) Inc.	256
203.21.47.0/24	AS18986	Calligo (Canada) Inc.	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
203.21.42.40	dpis.go.th	1
203.21.42.111	ocsc.go.th	1

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
203.21.42.254	AS56118 OCSC-TH	`2.94ms` 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
45.36.147.232	AS11426 Charter Communications Inc	`10.07ms` from Charlotte, US
117.177.69.72	AS139080 The Internet Data Center of Sichuan Mobile Communication Company Limited	`2.20ms` from Chengdu, CN
69.207.187.152	AS11351 Charter Communications Inc	`19.48ms` from Chicago, US
48.209.150.88	AS8075 Microsoft Corporation	`0.20ms` from Dublin, IE
212.77.178.248	AS12611 R-KOM Regensburger Telekommunikationsgesellschaft mbH	`4.82ms` from Frankfurt am Main, DE
211.154.143.152	AS134774 CHINANET Guangdong province Shenzhen MAN network	`3.64ms` from Guangzhou, CN
62.201.163.24	AS12731 IPHH Internet Port Hamburg GmbH	`0.46ms` from Hamburg, DE
185.170.178.232	AS51320 Wireless Logic Limited	`19.93ms` from London, GB
174.134.134.168	AS33363 Charter Communications, Inc	`9.35ms` from Los Angeles, US
74.70.235.216	AS11351 Charter Communications Inc	`18.40ms` from New York City, US
189.47.226.8	AS27699 TELEFÔNICA BRASIL S.A	`4.33ms` from Osasco, BR
181.178.40.136	AS11556 Cable & Wireless Panama	`1.65ms` from Panama, PA
97.165.150.88	AS6167 Verizon Business	`12.96ms` from Philadelphia, US
218.144.6.72	AS4766 Korea Telecom	`1.54ms` from Seoul, KR
54.65.165.136	AS16509 Amazon.com, Inc.	`0.21ms` from Tokyo, JP
60.109.177.184	AS17676 SoftBank Corp.	`2.38ms` from Tokyo, JP
153.232.130.200	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.53ms` from Tokyo, JP
213.118.6.88	AS6848 Telenet BV	`8.08ms` from Brussels, BE
89.133.169.104	AS21334 One Hungary Ltd.	`9.82ms` from Budapest, HU
222.176.21.216	AS4134 CHINANET-BACKBONE	`0.32ms` from Chongqing, CN
3.77.132.168	AS16509 Amazon.com, Inc.	`0.21ms` from Frankfurt am Main, DE
14.216.215.40	AS4134 CHINANET-BACKBONE	`4.81ms` from Guangzhou, CN
116.62.201.136	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.31ms` from Hangzhou, CN
80.222.217.56	AS1759 Telia Finland Oyj	`4.45ms` from Helsinki, FI
76.81.19.184	AS20001 Charter Communications Inc	`1.58ms` 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 203.21.42.1

traceroute to 203.21.42.1 (203.21.42.1): 64 hops max, 52 byte packets

2 [] 203.159.68.119 1.836 ms

3 [AS7693] 58.181.255.229 1.809 ms

4 [AS7693] 58.181.253.54 1.575 ms

5 [AS7693] 203.195.104.76 1.495 ms

6 [AS56118] 203.21.42.1 4.377 ms

Measurement taken from

IPinfo ProbeNet in Bangkok, TH

On January 19th 2026

What are IP address ranges?

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