65,536 routable33 ASes
/16 subnet
203.21.0.0/16
Where this subnet is, who announces it, and what our databases hold in it. Below, every /24 inside it; open one for its addresses.
65,536
routable addresses
49,152
geolocated
13
countries
33
announcing ASes
84
announced prefixes
60
anonymous addresses
Where it is
Addresses IP Geolocation places in each country, as a share of those it places.
- Australia38,400 · 78.13%
- China5,376 · 10.94%
- United States1,792 · 3.65%
- Canada512 · 1.04%
- Indonesia512 · 1.04%
- Philippines512 · 1.04%
- Thailand512 · 1.04%
- Czechia256 · 0.52%
- Micronesia256 · 0.52%
- India256 · 0.52%
Who announces it
Each /24 counted for the AS announcing most of it, as a share of the routable addresses.
- AS1221Telstra Limited5,120 · 7.81%
- AS703Verizon - Asia-Pac2,048 · 3.13%
- AS133612Vodafone Australia Pty Ltd2,048 · 3.13%
- AS24463Pacific National Services Pty Ltd1,024 · 1.56%
- AS132093The Royal Womens Hospital1,024 · 1.56%
- AS135409Kacific Broadband Satellites Pte Ltd1,024 · 1.56%
- AS135415RACQ Operations Pty Ltd1,024 · 1.56%
- AS2764AAPT Limited512 · 0.78%
- AS7545TPG Telecom Limited512 · 0.78%
- AS7575Australian Academic and Research Network (AARNet)512 · 0.78%
What the databases see
Addresses each address-keyed database holds in this block, as a share of its routable addresses. Counts overlap: one address can be in several.
- VPN IP570.09%
- 0.00%
- None here
- None here
- None here
- None here
- Hosting IP4,0966.25%
- None here
- Carrier IP1,7922.73%
- None here
- SSH IP3460.53%
- 0.01%
- 0.05%
Announced prefixes
Every prefix inside this block that BGP Route saw announced, with its origin and RPKI status.
| PREFIX | ORIGIN | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|---|
| 203.21.4.0/24 | AS216053Data Cloud Technology d.o.o Kragujevac | Serbia | valid | 18 | 2026-10-02 |
| 203.21.5.0/24 | AS7545TPG Telecom Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.7.0/24 | AS24448Synamedia Technologies (India) Private Limited | India | not found | 17 | 2026-10-02 |
| 203.21.9.0/24 | AS10143Exetel Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.12.0/24 | AS9650QLD Government Business (IT) | Australia | valid | 17 | 2026-10-02 |
| 203.21.15.0/24 | AS2764AAPT Limited | Australia | valid | 17 | 2026-10-02 |
| 203.21.20.0/24 | AS4739Internode Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.21.0/24 | AS17889Intraceptives Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.22.0/24 | AS9266Fiveways International Limited | Australia | valid | 17 | 2026-10-02 |
| 203.21.24.0/21 | AS703Verizon - Asia-Pac | United States | not found | 17 | 2026-10-02 |
| 203.21.37.0/24 | AS7575Australian Academic and Research Network (AARNet) | Australia | valid | 19 | 2026-10-02 |
| 203.21.40.0/24 | AS133015City of Stirling | Australia | valid | 17 | 2026-10-02 |
| 203.21.42.0/23 | AS56118OCSC | Thailand | not found | 18 | 2026-10-02 |
| 203.21.42.0/24 | AS56118OCSC | Thailand | not found | 18 | 2026-10-02 |
| 203.21.43.0/24 | AS56118OCSC | Thailand | not found | 18 | 2026-10-02 |
| 203.21.47.0/24 | AS18986Calligo (Canada) Inc. | Canada | valid | 17 | 2026-10-02 |
| 203.21.49.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.50.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.51.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.52.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.53.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.54.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.55.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.56.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.57.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.58.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.59.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.63.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.65.0/24 | AS154329Phoenix Business Solutions Australia Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.66.0/24 | AS209854Cyberzone S.A. | Czechia | valid | 17 | 2026-10-02 |
| 203.21.72.0/24 | AS395793Arisk Communications inc. | Australia | valid | 17 | 2026-10-02 |
| 203.21.76.0/23 | AS38549Viewbank Rise Networks | Australia | not found | 17 | 2026-10-02 |
| 203.21.76.0/24 | AS38549Viewbank Rise Networks | Australia | valid | 17 | 2026-10-02 |
| 203.21.77.0/24 | AS38549Viewbank Rise Networks | Australia | valid | 17 | 2026-10-02 |
| 203.21.78.0/24 | AS7545TPG Telecom Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.79.0/24 | AS2764AAPT Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.83.0/24 | AS7647OnTheNet Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.88.0/24 | AS132093The Royal Womens Hospital | Australia | not found | 17 | 2026-10-02 |
| 203.21.89.0/24 | AS132093The Royal Womens Hospital | Australia | not found | 17 | 2026-10-02 |
| 203.21.90.0/24 | AS132093The Royal Womens Hospital | Australia | not found | 17 | 2026-10-02 |
| 203.21.91.0/24 | AS132093The Royal Womens Hospital | Australia | not found | 17 | 2026-10-02 |
| 203.21.95.0/24 | AS9009M247 Europe SRL | Australia | valid | 17 | 2026-10-02 |
| 203.21.104.0/24 | AS18986Calligo (Canada) Inc. | Canada | valid | 17 | 2026-10-02 |
| 203.21.112.0/21 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.112.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.113.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.114.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.115.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.116.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.117.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.118.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.119.0/24 | AS133612Vodafone Australia Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.120.0/24 | AS17882UNIVISION LLC | Mongolia | valid | 17 | 2026-10-02 |
| 203.21.121.0/24 | AS7575Australian Academic and Research Network (AARNet) | Australia | not found | 19 | 2026-10-02 |
| 203.21.125.0/24 | AS45671Wholesale Services Provider | Australia | not found | 17 | 2026-10-02 |
| 203.21.130.0/23 | AS10148The University of Melbourne, Melbourne, Victoria | Australia | valid | 19 | 2026-10-02 |
| 203.21.134.0/24 | AS58716Penrith City Council | Australia | not found | 17 | 2026-10-02 |
| 203.21.140.0/22 | AS135409Kacific Broadband Satellites Pte Ltd | Samoa | valid | 18 | 2026-10-02 |
| 203.21.140.0/24 | AS135409Kacific Broadband Satellites Pte Ltd | Samoa | valid | 18 | 2026-10-02 |
| 203.21.150.0/23 | AS137896Hunter Water Corporation | Australia | not found | 17 | 2026-10-02 |
| 203.21.150.0/24 | AS137896Hunter Water Corporation | Australia | not found | 17 | 2026-10-02 |
| 203.21.151.0/24 | AS137896Hunter Water Corporation | Australia | not found | 17 | 2026-10-02 |
| 203.21.152.0/24 | AS8075Microsoft | Australia | valid | 17 | 2026-10-02 |
| 203.21.153.0/24 | AS8075Microsoft | Australia | valid | 17 | 2026-10-02 |
| 203.21.154.0/24 | AS9435Suncorp Corporate Services Pty Ltd | Australia | not found | 17 | 2026-10-02 |
| 203.21.182.0/23 | AS24463Pacific National Services Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.182.0/24 | AS24463Pacific National Services Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.183.0/24 | AS24463Pacific National Services Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.190.0/23 | AS24463Pacific National Services Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.190.0/24 | AS24463Pacific National Services Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.191.0/24 | AS24463Pacific National Services Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.192.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.193.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.194.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.195.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.196.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.197.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.198.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.199.0/24 | AS1221Telstra Limited | Australia | not found | 17 | 2026-10-02 |
| 203.21.200.0/24 | AS135415RACQ Operations Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.201.0/24 | AS135415RACQ Operations Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.202.0/24 | AS135415RACQ Operations Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.203.0/24 | AS135415RACQ Operations Pty Ltd | Australia | valid | 17 | 2026-10-02 |
| 203.21.207.0/24 | AS10143Exetel Pty Ltd | Australia | valid | 17 | 2026-10-02 |
Every /24 inside it
00 · Evaluate
Test the real build first.
An evaluation license puts a full current build in your hands — every row, every column, no sampling — so you can measure it against your own traffic before anyone talks about terms.
01 · License
Then license what you use.
Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell — priced by scope, not by seat.
Annual terms, a named contact, and flexible payment terms — monthly, quarterly or yearly.