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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        WM1241-AP
tech-c:         WM1241-AP
auth:           # Filtered
remarks:        [email protected] 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:          +66-2-547-1194
fax-no:         +66-2547-1081
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:47Z
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:         [email protected]
admin-c:        WM1241-AP
tech-c:         WM1241-AP
nic-hdl:        AO410-AP
remarks:        Generated from irt object IRT-OCSC-TH
remarks:        [email protected] was validated on 2025-10-15
abuse-mailbox:  [email protected]
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:         [email protected]
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
203.21.42.111	ocsc.go.th	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

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	`2.88ms` 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
172.73.103.232	AS11426 Charter Communications Inc	`9.54ms` from Atlanta, US
98.217.247.168	AS7922 Comcast Cable Communications, LLC	`7.27ms` from Boston, US
110.185.210.200	AS4134 CHINANET-BACKBONE	`2.94ms` from Chengdu, CN
80.130.58.72	AS3320 Deutsche Telekom AG	`4.54ms` from Duesseldorf, DE
18.198.101.8	AS16509 Amazon.com, Inc.	`0.19ms` from Frankfurt am Main, DE
142.129.246.88	AS20001 Charter Communications Inc	`4.73ms` from Los Angeles, US
83.35.192.40	AS3352 TELEFONICA DE ESPANA S.A.U.	`9.82ms` from Madrid, ES
35.229.123.88	AS396982 Google LLC	`0.13ms` from Moncks Corner, US
161.118.183.8	AS31898 Oracle Corporation	`0.19ms` from Mumbai, IN
112.86.185.232	AS4837 CHINA UNICOM China169 Backbone	`5.34ms` from Nanjing, CN
46.254.132.8	AS29694 VILLAGENET Ltd.	`8.23ms` from Sofia, BG
18.182.134.136	AS16509 Amazon.com, Inc.	`0.18ms` from Tokyo, JP
20.104.241.120	AS8075 Microsoft Corporation	`0.20ms` from Toronto, CA
52.61.34.248	AS8987 Amazon Data Services Ireland Ltd	`0.31ms` from Boardman, US
52.169.199.120	AS8075 Microsoft Corporation	`0.23ms` from Dublin, IE
109.156.241.24	AS2856 British Telecommunications PLC	`2.09ms` from Erith, GB
62.201.163.24	AS12731 IPHH Internet Port Hamburg GmbH	`0.46ms` from Hamburg, DE
27.73.11.104	AS7552 Viettel Group	`5.82ms` from Hanoi, VN
73.115.33.24	AS7922 Comcast Cable Communications, LLC	`9.49ms` from Houston, US
24.205.93.8	AS20115 Charter Communications LLC	`4.71ms` from Los Angeles, US
158.110.128.24	AS137 Consortium GARR	`5.58ms` from Milan, IT
87.6.3.104	AS3269 Telecom Italia S.p.A.	`1.83ms` from Milan, IT
59.62.245.184	AS4134 CHINANET-BACKBONE	`6.68ms` from Nanchang, CN
73.226.171.200	AS7922 Comcast Cable Communications, LLC	`6.09ms` from New York City, US
80.151.229.40	AS3320 Deutsche Telekom AG	`2.76ms` from Nuernberg, DE

Traceroute

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

traceroute -a -n -q1 -f3 203.21.42.1

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

3 [AS48422] 46.172.77.199 16.343 ms

4 [] 185.0.27.51 41.55 ms

5 *

6 *

7 *

8 [] 203.99.8.154 209.179 ms

9 [AS56118] 203.21.42.1 233.172 ms

Measurement taken from

IPinfo ProbeNet in Kharkiv, UA

On December 28th 2025

What are IP address ranges?

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