203.21.0.0/16

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Summary

IP address summary information
ASNs	34
Countries	14
BGP Prefixes	83
Routers	49
Pingable IPs	1,220

Australia
95.87%
China
1.91%
New Zealand
1.14%
United States
0.26%
Other
0.83%


203.21.0.0/24	China100.00%	1	0	0
203.21.1.0/24	China100.00%	1	0	0
203.21.2.0/24	China100.00%	1	0	0
203.21.3.0/24	Australia100.00%	1	0	0
203.21.4.0/24	Serbia100.00%	1	1	1
203.21.5.0/24	Australia100.00%	1	1	0
203.21.6.0/24	Australia100.00%	1	0	0
203.21.7.0/24	India100.00%	1	1	2
203.21.8.0/24	China100.00%	1	0	0
203.21.9.0/24	Australia100.00%	1	1	0

Sub-ranges

Important routers in 203.21.0.0/16


203.21.4.53	Kragujevac, Serbia	AS216053Data Cloud Technology d.o.o Kragujevac
203.21.191.253	Sydney, Australia	AS24463Pacific National Services Pty Ltd
203.21.190.253	Sydney, Australia	AS24463Pacific National Services Pty Ltd
203.21.114.132	Sydney, Australia	AS133612Vodafone Australia Pty Ltd
203.21.150.69	Sydney, Australia	AS137896Hunter Water Corporation
203.21.113.131	Sydney, Australia	AS133612Vodafone Australia Pty Ltd
203.21.42.254	Mueang Nonthaburi, Thailand	AS56118OCSC
203.21.112.130	Melbourne, Australia	AS133612Vodafone Australia Pty Ltd
203.21.200.34	Gold Coast, Australia	AS135415RACQ Operations Pty Ltd
203.21.40.253	Perth, Australia	AS133015City of Stirling

Important routers in 203.21.0.0/16

Pingable IPs

1,220 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.


203.21.42.254	AS56118OCSC	2.83ms from Bangkok, TH
203.21.114.133	AS133612Vodafone Australia Pty Ltd	0.92ms from Sydney, AU
203.21.142.9	AS135409Kacific Broadband Satellites Pte Ltd	554.98ms from Manila, PH
203.21.83.60	AS7647OnTheNet Pty Ltd	0.98ms from Melbourne, AU
203.21.4.49	AS216053Data Cloud Technology d.o.o Kragujevac	1.78ms from Belgrade, RS
203.21.150.70	AS137896Hunter Water Corporation	0.50ms from Sydney, AU
203.21.79.130	AS2764AAPT Limited	6.00ms from Melbourne, AU
203.21.77.193	AS38549Viewbank Rise Networks	3.38ms from Melbourne, AU
203.21.196.30	AS1221Telstra Limited	12.38ms from Sydney, AU
203.21.119.140	AS133612Vodafone Australia Pty Ltd	0.76ms from Sydney, AU

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.


198.37.107.128	AS17216DC74 LLC	0.40ms from Charlotte, US
97.92.46.80	AS20115Charter Communications LLC	13.09ms from Chicago, US
3.22.108.32	AS16509Amazon.com, Inc.	0.19ms from Columbus, US
123.172.161.144	AS4134CHINANET BACKBONE	14.85ms from Harbin, CN
98.150.209.48	AS20001Charter Communications Inc	4.65ms from Honolulu, US
118.53.102.112	AS4766Korea Telecom	2.32ms from Incheon, KR
136.37.19.48	AS16591Google Fiber Inc.	0.59ms from Kansas City, US
58.6.75.176	AS7545TPG Telecom Limited	2.17ms from Melbourne, AU
125.112.152.176	AS4134CHINANET BACKBONE	9.02ms from Ningbo, CN
153.230.249.48	AS4713NTT DOCOMO BUSINESS,Inc.	7.81ms from Osaka, JP

Pingable IPs

Traceroute

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

$ traceroute -a -n -q1 -f2 203.21.52.21

traceroute to 203.21.52.21 (203.21.52.21): 64 hops max, 52 byte packets

2 [AS136557] 103.216.222.142 0.08 ms

3 [AS136557] 103.216.222.140 0.225 ms

4 [AS136557] 103.216.222.20 0.157 ms

5 [AS136557] 103.216.222.19 0.268 ms

6 [AS136557] 103.216.222.210 0.758 ms

7 *

8 *

9 *

10 [AS1221] 110.145.209.37 1.54 ms

11 [AS1221] 203.50.6.14 1.474 ms

12 [AS1221] 203.50.11.151 0.867 ms

13 [AS1221] 110.145.200.86 1.321 ms

14 [AS1221] 203.21.51.11 1.584 ms

15 [AS1221] 203.21.52.21 0.931 ms

Measurement taken from

IPinfo ProbeNet in Adelaide, AU

On July 12, 2026

Traceroute

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203.21.0.0/16

Summary

Sub-ranges

Important routers in 203.21.0.0/16

Important routers in 203.21.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

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Important routers in 203.21.0.0/16

Pingable IPs

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Traceroute

203.21.0.0/16

Summary

Statistics

Statistics

Sub-ranges

Sub-ranges

Important routers in 203.21.0.0/16

Important routers in 203.21.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Statistics

Sub-ranges

Important routers in 203.21.0.0/16

Pingable IPs

Other Pingable IPs

Traceroute