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HomeAll IP Ranges203.0.0.0/8203.1.0.0/16
65,536 routable15 ASes
/16 subnet

203.1.0.0/16

Where this subnet is, who announces it, and what our databases hold in it. Below, every /24 inside it; open one for its addresses.

203.0.0.0/16203.2.0.0/16
65,536
routable addresses
65,536
geolocated
7
countries
15
announcing ASes
41
announced prefixes
101
anonymous addresses

Where it is

Addresses IP Geolocation places in each country, as a share of those it places.

  1. Australia57,089 · 87.11%
  2. China6,400 · 9.77%
  3. Indonesia512 · 0.78%
  4. Singapore512 · 0.78%
  5. United States512 · 0.78%
  6. Switzerland256 · 0.39%
  7. United Kingdom255 · 0.39%

Who announces it

Each /24 counted for the AS announcing most of it, as a share of the routable addresses.

  1. AS7575Australian Academic and Research Network (AARNet)13,824 · 21.09%
  2. AS9792Corinthian Engineering Pty Ltd2,048 · 3.13%
  3. AS38263Austereo Internet Network2,048 · 3.13%
  4. AS133787Primary Health Care1,536 · 2.34%
  5. AS17766Nexon Asia Pacific Pty Ltd1,024 · 1.56%
  6. AS38534IOOF SERVICE CO PTY LTD768 · 1.17%
  7. AS56270ROJAN AUSTRALIA768 · 1.17%
  8. AS9913Internet Information Group512 · 0.78%
  9. AS137991Lifeway Singapore Pte. Ltd.512 · 0.78%
  10. AS7474SingTel Optus Pty Ltd256 · 0.39%

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.

Announced prefixes

Every prefix inside this block that BGP Route saw announced, with its origin and RPKI status.

41 prefixes
PREFIXORIGINCOUNTRYRPKIPEERSFIRST SEEN
203.1.9.0/24AS56270ROJAN AUSTRALIAUnited StatesValid172026-10-02
203.1.10.0/24AS56270ROJAN AUSTRALIAUnited StatesNot found172026-10-02
203.1.15.0/24AS56270ROJAN AUSTRALIAAustraliaNot found172026-10-02
203.1.16.0/24AS134096eHealth NSWAustraliaNot found192026-10-02
203.1.19.0/24AS198433CKW Fiber Services AGSwitzerlandValid172026-10-02
203.1.22.0/23AS137991Lifeway Singapore Pte. Ltd.SingaporeValid172026-10-02
203.1.22.0/24AS137991Lifeway Singapore Pte. Ltd.SingaporeValid182026-10-02
203.1.28.0/24AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.32.0/19AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.64.0/24AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.68.0/24AS9913Internet Information GroupAustraliaValid172026-10-02
203.1.69.0/24AS9913Internet Information GroupAustraliaValid172026-10-02
203.1.80.0/24AS7474SingTel Optus Pty LtdAustraliaNot found172026-10-02
203.1.91.0/24AS154143PT AZWAR DIGITAL NETWORKSIndonesiaValid182026-10-02
203.1.104.0/24AS38534IOOF SERVICE CO PTY LTDAustraliaValid172026-10-02
203.1.105.0/24AS396982Google LLCAustraliaValid172026-10-02
203.1.106.0/24AS38534IOOF SERVICE CO PTY LTDAustraliaValid172026-10-02
203.1.107.0/24AS38534IOOF SERVICE CO PTY LTDAustraliaValid172026-10-02
203.1.110.0/23AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.203.0/24AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.204.0/24AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.208.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.209.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.210.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.211.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.212.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.213.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.214.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.215.0/24AS38263Austereo Internet NetworkAustraliaValid172026-10-02
203.1.216.0/22AS133787Primary Health CareAustraliaValid172026-10-02
203.1.218.0/24AS133787Primary Health CareAustraliaValid172026-10-02
203.1.219.0/24AS133787Primary Health CareAustraliaValid172026-10-02
203.1.220.0/23AS133787Primary Health CareAustraliaValid172026-10-02
203.1.220.0/24AS133787Primary Health CareAustraliaValid172026-10-02
203.1.221.0/24AS133787Primary Health CareAustraliaValid172026-10-02
203.1.224.0/20AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.237.0/24AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.238.0/24AS7575Australian Academic and Research Network (AARNet)AustraliaNot found192026-10-02
203.1.240.0/21AS9792Corinthian Engineering Pty LtdAustraliaValid172026-10-02
203.1.248.0/22AS17766Nexon Asia Pacific Pty LtdAustraliaValid172026-10-02
203.1.252.0/24AS136572Office of The Chief Information Officer (OCIO)AustraliaNot found172026-10-02

Every /24 inside it

203.1.0.0/24Australia—000.00%
203.1.1.0/24Australia—000.00%
203.1.2.0/24Australia—000.00%
203.1.3.0/24Australia—000.00%
203.1.4.0/24China—000.00%
203.1.5.0/24China—000.00%
203.1.6.0/24China—000.00%
203.1.7.0/24China—000.00%
203.1.8.0/24United Kingdom—000.00%
203.1.9.0/24United StatesAS56270ROJAN AUSTRALIA100.39%
203.1.10.0/24United StatesAS56270ROJAN AUSTRALIA100.39%
203.1.11.0/24Australia—000.00%
203.1.12.0/24Australia—000.00%
203.1.13.0/24Australia—000.00%
203.1.14.0/24Australia—000.00%
203.1.15.0/24AustraliaAS56270ROJAN AUSTRALIA501.95%
203.1.16.0/24AustraliaAS134096eHealth NSW000.00%
203.1.17.0/24Australia—000.00%
203.1.18.0/24China—000.00%
203.1.19.0/24SwitzerlandAS198433CKW Fiber Services AG32012.50%
203.1.20.0/24Australia—000.00%
203.1.21.0/24Australia—000.00%
203.1.22.0/24SingaporeAS137991Lifeway Singapore Pte. Ltd.702.73%
203.1.23.0/24SingaporeAS137991Lifeway Singapore Pte. Ltd.000.00%
203.1.24.0/24Australia—000.00%
203.1.25.0/24Indonesia—000.00%
203.1.26.0/24China—000.00%
203.1.27.0/24China—000.00%
203.1.28.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.29.0/24Australia—000.00%
203.1.30.0/24Australia—000.00%
203.1.31.0/24Australia—000.00%
203.1.32.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.33.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.34.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.35.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.36.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.37.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.38.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.39.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.40.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.41.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.42.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.43.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.44.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.45.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.46.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.47.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.48.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.49.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.50.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.51.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.52.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.53.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.54.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.55.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.56.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.57.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.58.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.59.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.60.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.61.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.62.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.63.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.64.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.65.0/24China—000.00%
203.1.66.0/24China—000.00%
203.1.67.0/24China—000.00%
203.1.68.0/24AustraliaAS9913Internet Information Group4256100.00%
203.1.69.0/24AustraliaAS9913Internet Information Group0256100.00%
203.1.70.0/24China—000.00%
203.1.71.0/24China—000.00%
203.1.72.0/24Australia—000.00%
203.1.73.0/24Australia—000.00%
203.1.74.0/24Australia—000.00%
203.1.75.0/24Australia—000.00%
203.1.76.0/24China—000.00%
203.1.77.0/24China—000.00%
203.1.78.0/24Australia—000.00%
203.1.79.0/24Australia—000.00%
203.1.80.0/24AustraliaAS7474SingTel Optus Pty Ltd000.00%
203.1.81.0/24Australia—000.00%
203.1.82.0/24Australia—000.00%
203.1.83.0/24Australia—000.00%
203.1.84.0/24Australia—000.00%
203.1.85.0/24Australia—000.00%
203.1.86.0/24Australia—000.00%
203.1.87.0/24Australia—000.00%
203.1.88.0/24Australia—000.00%
203.1.89.0/24Australia—000.00%
203.1.90.0/24China—000.00%
203.1.91.0/24IndonesiaAS154143PT AZWAR DIGITAL NETWORKS1505.86%
203.1.92.0/24Australia—000.00%
203.1.93.0/24Australia—000.00%
203.1.94.0/24Australia—000.00%
203.1.95.0/24Australia—000.00%
203.1.96.0/24Australia—000.00%
203.1.97.0/24China—000.00%
203.1.98.0/24China—000.00%
203.1.99.0/24China—000.00%
203.1.100.0/24China—000.00%
203.1.101.0/24China—000.00%
203.1.102.0/24China—000.00%
203.1.103.0/24China—000.00%
203.1.104.0/24AustraliaAS38534IOOF SERVICE CO PTY LTD000.00%
203.1.105.0/24AustraliaAS396982Google LLC0256100.00%
203.1.106.0/24AustraliaAS38534IOOF SERVICE CO PTY LTD000.00%
203.1.107.0/24AustraliaAS38534IOOF SERVICE CO PTY LTD000.00%
203.1.108.0/24China—000.00%
203.1.109.0/24Australia—000.00%
203.1.110.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.111.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.112.0/24Australia—000.00%
203.1.113.0/24Australia—000.00%
203.1.114.0/24Australia—000.00%
203.1.115.0/24Australia—000.00%
203.1.116.0/24Australia—000.00%
203.1.117.0/24Australia—000.00%
203.1.118.0/24Australia—000.00%
203.1.119.0/24Australia—000.00%
203.1.120.0/24Australia—000.00%
203.1.121.0/24Australia—000.00%
203.1.122.0/24Australia—000.00%
203.1.123.0/24Australia—000.00%
203.1.124.0/24Australia—000.00%
203.1.125.0/24Australia—000.00%
203.1.126.0/24Australia—000.00%
203.1.127.0/24Australia—000.00%
203.1.128.0/24Australia—000.00%
203.1.129.0/24Australia—000.00%
203.1.130.0/24Australia—000.00%
203.1.131.0/24Australia—000.00%
203.1.132.0/24Australia—000.00%
203.1.133.0/24Australia—000.00%
203.1.134.0/24Australia—000.00%
203.1.135.0/24Australia—000.00%
203.1.136.0/24Australia—000.00%
203.1.137.0/24Australia—000.00%
203.1.138.0/24Australia—000.00%
203.1.139.0/24Australia—000.00%
203.1.140.0/24Australia—000.00%
203.1.141.0/24Australia—000.00%
203.1.142.0/24Australia—000.00%
203.1.143.0/24Australia—000.00%
203.1.144.0/24Australia—000.00%
203.1.145.0/24Australia—000.00%
203.1.146.0/24Australia—000.00%
203.1.147.0/24Australia—000.00%
203.1.148.0/24Australia—000.00%
203.1.149.0/24Australia—000.00%
203.1.150.0/24Australia—000.00%
203.1.151.0/24Australia—000.00%
203.1.152.0/24Australia—000.00%
203.1.153.0/24Australia—000.00%
203.1.154.0/24Australia—000.00%
203.1.155.0/24Australia—000.00%
203.1.156.0/24Australia—000.00%
203.1.157.0/24Australia—000.00%
203.1.158.0/24Australia—000.00%
203.1.159.0/24Australia—000.00%
203.1.160.0/24Australia—000.00%
203.1.161.0/24Australia—000.00%
203.1.162.0/24Australia—000.00%
203.1.163.0/24Australia—000.00%
203.1.164.0/24Australia—000.00%
203.1.165.0/24Australia—000.00%
203.1.166.0/24Australia—000.00%
203.1.167.0/24Australia—000.00%
203.1.168.0/24Australia—000.00%
203.1.169.0/24Australia—000.00%
203.1.170.0/24Australia—000.00%
203.1.171.0/24Australia—000.00%
203.1.172.0/24Australia—000.00%
203.1.173.0/24Australia—000.00%
203.1.174.0/24Australia—000.00%
203.1.175.0/24Australia—000.00%
203.1.176.0/24Australia—000.00%
203.1.177.0/24Australia—000.00%
203.1.178.0/24Australia—000.00%
203.1.179.0/24Australia—000.00%
203.1.180.0/24Australia—000.00%
203.1.181.0/24Australia—000.00%
203.1.182.0/24Australia—000.00%
203.1.183.0/24Australia—000.00%
203.1.184.0/24Australia—000.00%
203.1.185.0/24Australia—000.00%
203.1.186.0/24Australia—000.00%
203.1.187.0/24Australia—000.00%
203.1.188.0/24Australia—000.00%
203.1.189.0/24Australia—000.00%
203.1.190.0/24Australia—000.00%
203.1.191.0/24Australia—000.00%
203.1.192.0/24Australia—000.00%
203.1.193.0/24Australia—000.00%
203.1.194.0/24Australia—000.00%
203.1.195.0/24Australia—000.00%
203.1.196.0/24Australia—000.00%
203.1.197.0/24Australia—000.00%
203.1.198.0/24Australia—000.00%
203.1.199.0/24Australia—000.00%
203.1.200.0/24Australia—000.00%
203.1.201.0/24Australia—000.00%
203.1.202.0/24Australia—000.00%
203.1.203.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)200.78%
203.1.204.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.205.0/24Australia—000.00%
203.1.206.0/24Australia—000.00%
203.1.207.0/24Australia—000.00%
203.1.208.0/24AustraliaAS38263Austereo Internet Network301.17%
203.1.209.0/24AustraliaAS38263Austereo Internet Network000.00%
203.1.210.0/24AustraliaAS38263Austereo Internet Network602.34%
203.1.211.0/24AustraliaAS38263Austereo Internet Network602.34%
203.1.212.0/24AustraliaAS38263Austereo Internet Network000.00%
203.1.213.0/24AustraliaAS38263Austereo Internet Network301.17%
203.1.214.0/24AustraliaAS38263Austereo Internet Network000.00%
203.1.215.0/24AustraliaAS38263Austereo Internet Network000.00%
203.1.216.0/24AustraliaAS133787Primary Health Care000.00%
203.1.217.0/24AustraliaAS133787Primary Health Care000.00%
203.1.218.0/24AustraliaAS133787Primary Health Care000.00%
203.1.219.0/24AustraliaAS133787Primary Health Care000.00%
203.1.220.0/24AustraliaAS133787Primary Health Care000.00%
203.1.221.0/24AustraliaAS133787Primary Health Care000.00%
203.1.222.0/24Australia—000.00%
203.1.223.0/24Australia—000.00%
203.1.224.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.225.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.226.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.227.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.228.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.229.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.230.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.231.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.232.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.233.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.234.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.235.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.236.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.237.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)301.17%
203.1.238.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)301.17%
203.1.239.0/24AustraliaAS7575Australian Academic and Research Network (AARNet)000.00%
203.1.240.0/24AustraliaAS9792Corinthian Engineering Pty Ltd200.78%
203.1.241.0/24AustraliaAS9792Corinthian Engineering Pty Ltd000.00%
203.1.242.0/24AustraliaAS9792Corinthian Engineering Pty Ltd803.13%
203.1.243.0/24AustraliaAS9792Corinthian Engineering Pty Ltd000.00%
203.1.244.0/24AustraliaAS9792Corinthian Engineering Pty Ltd000.00%
203.1.245.0/24AustraliaAS9792Corinthian Engineering Pty Ltd000.00%
203.1.246.0/24AustraliaAS9792Corinthian Engineering Pty Ltd000.00%
203.1.247.0/24AustraliaAS9792Corinthian Engineering Pty Ltd000.00%
203.1.248.0/24AustraliaAS17766Nexon Asia Pacific Pty Ltd000.00%
203.1.249.0/24AustraliaAS17766Nexon Asia Pacific Pty Ltd000.00%
203.1.250.0/24AustraliaAS17766Nexon Asia Pacific Pty Ltd000.00%
203.1.251.0/24AustraliaAS17766Nexon Asia Pacific Pty Ltd000.00%
203.1.252.0/24AustraliaAS136572Office of The Chief Information Officer (OCIO)000.00%
203.1.253.0/24China—000.00%
203.1.254.0/24China—000.00%
203.1.255.0/24Australia—000.00%
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