203.21.0.0/16
41 assigned ranges in this /16.
/24 breakdown
| Block | Top country | Countries | ASNs | Ranges |
|---|---|---|---|---|
| 203.21.4.0/24 | Serbia (100%) | 1 | 1 | 1 |
| 203.21.5.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.7.0/24 | India (100%) | 1 | 1 | 1 |
| 203.21.9.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.12.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.15.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.20.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.21.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.22.0/24 | Hong Kong (100%) | 1 | 1 | 1 |
| 203.21.24.0/24 | United States (100%) | 1 | 1 | 1 |
| 203.21.37.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.40.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.42.0/24 | Thailand (100%) | 1 | 1 | 1 |
| 203.21.47.0/24 | Canada (100%) | 1 | 1 | 1 |
| 203.21.49.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.63.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.65.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.66.0/24 | Panama (100%) | 1 | 1 | 1 |
| 203.21.72.0/24 | United States (100%) | 1 | 1 | 1 |
| 203.21.76.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.78.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.79.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.83.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.88.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.95.0/24 | Romania (100%) | 1 | 1 | 1 |
| 203.21.104.0/24 | Canada (100%) | 1 | 1 | 1 |
| 203.21.112.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.120.0/24 | Mongolia (100%) | 1 | 1 | 1 |
| 203.21.121.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.125.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.130.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.134.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.140.0/24 | Singapore (100%) | 1 | 1 | 1 |
| 203.21.150.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.152.0/24 | United States (100%) | 1 | 1 | 1 |
| 203.21.154.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.182.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.190.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.192.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.200.0/24 | Australia (100%) | 1 | 1 | 1 |
| 203.21.207.0/24 | Australia (100%) | 1 | 1 | 1 |
Assigned ranges
| Range | ASN | Org | Country |
|---|---|---|---|
203.21.4.0 – 203.21.4.255 | AS216053 | Data Cloud Technology d.o.o Kragujevac | RS |
203.21.5.0 – 203.21.5.255 | AS7545 | TPG Internet Pty Ltd | AU |
203.21.7.0 – 203.21.7.255 | AS24448 | Synamedia Technologies (India) Private Limited | IN |
203.21.9.0 – 203.21.9.255 | AS10143 | SUPERLOOP (AUSTRALIA) PTY LTD | AU |
203.21.12.0 – 203.21.12.255 | AS9650 | CITEC | AU |
203.21.15.0 – 203.21.15.255 | AS2764 | AAPT Limited | AU |
203.21.20.0 – 203.21.20.255 | AS4739 | iiNet Limited | AU |
203.21.21.0 – 203.21.21.255 | AS17889 | Intraceptives Pty Ltd | AU |
203.21.22.0 – 203.21.22.255 | AS9266 | Fiveways International Limited | HK |
203.21.24.0 – 203.21.31.255 | AS703 | Verizon Business | US |
203.21.37.0 – 203.21.37.255 | AS7575 | Australian Academic and Research Network | AU |
203.21.40.0 – 203.21.40.255 | AS133015 | City of Stirling | AU |
203.21.42.0 – 203.21.43.255 | AS56118 | Office of the Civil Service Commission (OCSC) | TH |
203.21.47.0 – 203.21.47.255 | AS18986 | Calligo (Canada) Inc. | CA |
203.21.49.0 – 203.21.59.255 | AS1221 | Telstra Limited | AU |
26 more ranges in this block.