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InternetData
65,536 routable5 ASes
/16 subnet

203.181.0.0/16

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
65,536
geolocated
1
country
5
announcing ASes
10
announced prefixes
1,650
anonymous addresses

Where it is

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

  1. Japan65,536 · 100.00%

Who announces it

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

  1. AS4685Asahi Net16,384 · 25.00%
  2. AS2907Research Organization of Information and Systems, National Institute of Informatics15,360 · 23.44%
  3. AS2516KDDI CORPORATION8,192 · 12.50%
  4. AS10013FreeBit Co.,Ltd.8,192 · 12.50%
  5. AS7660Asia Pacific Advanced Network - Japan1,024 · 1.56%

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.

10 prefixes
PREFIXORIGINCOUNTRYRPKIPEERSFIRST SEEN
203.181.0.0/18AS4685Asahi NetJapanValid172026-10-02
203.181.64.0/20AS10013FreeBit Co.,Ltd.JapanNot found172026-10-02
203.181.80.0/23AS10013FreeBit Co.,Ltd.JapanNot found172026-10-02
203.181.82.0/23AS10013FreeBit Co.,Ltd.JapanValid172026-10-02
203.181.84.0/22AS10013FreeBit Co.,Ltd.JapanValid172026-10-02
203.181.88.0/21AS10013FreeBit Co.,Ltd.JapanValid172026-10-02
203.181.96.0/19AS2516KDDI CORPORATIONJapanValid172026-10-02
203.181.192.0/18AS2907Research Organization of Information and Systems, National Institute of InformaticsJapanNot found192026-10-02
203.181.194.0/23AS7660Asia Pacific Advanced Network - JapanJapanValid192026-10-02
203.181.248.0/23AS7660Asia Pacific Advanced Network - JapanJapanValid192026-10-02

Every /24 inside it

203.181.0.0/24JapanAS4685Asahi Net74028.91%
203.181.1.0/24JapanAS4685Asahi Net42016.41%
203.181.2.0/24JapanAS4685Asahi Net000.00%
203.181.3.0/24JapanAS4685Asahi Net1807.03%
203.181.4.0/24JapanAS4685Asahi Net000.00%
203.181.5.0/24JapanAS4685Asahi Net000.00%
203.181.6.0/24JapanAS4685Asahi Net60023.44%
203.181.7.0/24JapanAS4685Asahi Net000.00%
203.181.8.0/24JapanAS4685Asahi Net000.00%
203.181.9.0/24JapanAS4685Asahi Net000.00%
203.181.10.0/24JapanAS4685Asahi Net000.00%
203.181.11.0/24JapanAS4685Asahi Net000.00%
203.181.12.0/24JapanAS4685Asahi Net67026.17%
203.181.13.0/24JapanAS4685Asahi Net61023.83%
203.181.14.0/24JapanAS4685Asahi Net110042.97%
203.181.15.0/24JapanAS4685Asahi Net113044.14%
203.181.16.0/24JapanAS4685Asahi Net49019.14%
203.181.17.0/24JapanAS4685Asahi Net35013.67%
203.181.18.0/24JapanAS4685Asahi Net000.00%
203.181.19.0/24JapanAS4685Asahi Net000.00%
203.181.20.0/24JapanAS4685Asahi Net000.00%
203.181.21.0/24JapanAS4685Asahi Net000.00%
203.181.22.0/24JapanAS4685Asahi Net000.00%
203.181.23.0/24JapanAS4685Asahi Net000.00%
203.181.24.0/24JapanAS4685Asahi Net36014.06%
203.181.25.0/24JapanAS4685Asahi Net1003.91%
203.181.26.0/24JapanAS4685Asahi Net200.78%
203.181.27.0/24JapanAS4685Asahi Net1305.08%
203.181.28.0/24JapanAS4685Asahi Net000.00%
203.181.29.0/24JapanAS4685Asahi Net1104.30%
203.181.30.0/24JapanAS4685Asahi Net65025.39%
203.181.31.0/24JapanAS4685Asahi Net74028.91%
203.181.32.0/24JapanAS4685Asahi Net000.00%
203.181.33.0/24JapanAS4685Asahi Net000.00%
203.181.34.0/24JapanAS4685Asahi Net000.00%
203.181.35.0/24JapanAS4685Asahi Net000.00%
203.181.36.0/24JapanAS4685Asahi Net1907.42%
203.181.37.0/24JapanAS4685Asahi Net000.00%
203.181.38.0/24JapanAS4685Asahi Net2108.20%
203.181.39.0/24JapanAS4685Asahi Net000.00%
203.181.40.0/24JapanAS4685Asahi Net58022.66%
203.181.41.0/24JapanAS4685Asahi Net39015.23%
203.181.42.0/24JapanAS4685Asahi Net45017.58%
203.181.43.0/24JapanAS4685Asahi Net35013.67%
203.181.44.0/24JapanAS4685Asahi Net000.00%
203.181.45.0/24JapanAS4685Asahi Net82032.03%
203.181.46.0/24JapanAS4685Asahi Net106041.41%
203.181.47.0/24JapanAS4685Asahi Net93036.33%
203.181.48.0/24JapanAS4685Asahi Net33012.89%
203.181.49.0/24JapanAS4685Asahi Net80031.25%
203.181.50.0/24JapanAS4685Asahi Net36014.06%
203.181.51.0/24JapanAS4685Asahi Net30011.72%
203.181.52.0/24JapanAS4685Asahi Net33012.89%
203.181.53.0/24JapanAS4685Asahi Net000.00%
203.181.54.0/24JapanAS4685Asahi Net000.00%
203.181.55.0/24JapanAS4685Asahi Net000.00%
203.181.56.0/24JapanAS4685Asahi Net000.00%
203.181.57.0/24JapanAS4685Asahi Net000.00%
203.181.58.0/24JapanAS4685Asahi Net000.00%
203.181.59.0/24JapanAS4685Asahi Net000.00%
203.181.60.0/24JapanAS4685Asahi Net000.00%
203.181.61.0/24JapanAS4685Asahi Net000.00%
203.181.62.0/24JapanAS4685Asahi Net000.00%
203.181.63.0/24JapanAS4685Asahi Net1003.91%
203.181.64.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.65.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.66.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.67.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.68.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.69.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.70.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.71.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.72.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.73.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.74.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.75.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.76.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.77.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.78.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.79.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.80.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.81.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.82.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.83.0/24JapanAS10013FreeBit Co.,Ltd.214457.03%
203.181.84.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.85.0/24JapanAS10013FreeBit Co.,Ltd.09637.50%
203.181.86.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.87.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.88.0/24JapanAS10013FreeBit Co.,Ltd.301.17%
203.181.89.0/24JapanAS10013FreeBit Co.,Ltd.401.56%
203.181.90.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.91.0/24JapanAS10013FreeBit Co.,Ltd.200.78%
203.181.92.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.93.0/24JapanAS10013FreeBit Co.,Ltd.100.39%
203.181.94.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.95.0/24JapanAS10013FreeBit Co.,Ltd.000.00%
203.181.96.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.97.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.98.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.99.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.100.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.101.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.102.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.103.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.104.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.105.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.106.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.107.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.108.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.109.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.110.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.111.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.112.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.113.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.114.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.115.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.116.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.117.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.118.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.119.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.120.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.121.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.122.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.123.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.124.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.125.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.126.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.127.0/24JapanAS2516KDDI CORPORATION000.00%
203.181.128.0/24Japan—000.00%
203.181.129.0/24Japan—000.00%
203.181.130.0/24Japan—000.00%
203.181.131.0/24Japan—000.00%
203.181.132.0/24Japan—000.00%
203.181.133.0/24Japan—000.00%
203.181.134.0/24Japan—000.00%
203.181.135.0/24Japan—000.00%
203.181.136.0/24Japan—000.00%
203.181.137.0/24Japan—000.00%
203.181.138.0/24Japan—000.00%
203.181.139.0/24Japan—000.00%
203.181.140.0/24Japan—000.00%
203.181.141.0/24Japan—000.00%
203.181.142.0/24Japan—000.00%
203.181.143.0/24Japan—000.00%
203.181.144.0/24Japan—000.00%
203.181.145.0/24Japan—000.00%
203.181.146.0/24Japan—000.00%
203.181.147.0/24Japan—000.00%
203.181.148.0/24Japan—000.00%
203.181.149.0/24Japan—000.00%
203.181.150.0/24Japan—000.00%
203.181.151.0/24Japan—000.00%
203.181.152.0/24Japan—000.00%
203.181.153.0/24Japan—000.00%
203.181.154.0/24Japan—000.00%
203.181.155.0/24Japan—000.00%
203.181.156.0/24Japan—000.00%
203.181.157.0/24Japan—000.00%
203.181.158.0/24Japan—000.00%
203.181.159.0/24Japan—000.00%
203.181.160.0/24Japan—000.00%
203.181.161.0/24Japan—000.00%
203.181.162.0/24Japan—000.00%
203.181.163.0/24Japan—000.00%
203.181.164.0/24Japan—000.00%
203.181.165.0/24Japan—000.00%
203.181.166.0/24Japan—000.00%
203.181.167.0/24Japan—000.00%
203.181.168.0/24Japan—000.00%
203.181.169.0/24Japan—000.00%
203.181.170.0/24Japan—000.00%
203.181.171.0/24Japan—000.00%
203.181.172.0/24Japan—000.00%
203.181.173.0/24Japan—000.00%
203.181.174.0/24Japan—000.00%
203.181.175.0/24Japan—000.00%
203.181.176.0/24Japan—000.00%
203.181.177.0/24Japan—000.00%
203.181.178.0/24Japan—000.00%
203.181.179.0/24Japan—000.00%
203.181.180.0/24Japan—000.00%
203.181.181.0/24Japan—000.00%
203.181.182.0/24Japan—000.00%
203.181.183.0/24Japan—000.00%
203.181.184.0/24Japan—000.00%
203.181.185.0/24Japan—000.00%
203.181.186.0/24Japan—000.00%
203.181.187.0/24Japan—000.00%
203.181.188.0/24Japan—000.00%
203.181.189.0/24Japan—000.00%
203.181.190.0/24Japan—000.00%
203.181.191.0/24Japan—000.00%
203.181.192.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.193.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.194.0/24JapanAS7660Asia Pacific Advanced Network - Japan000.00%
203.181.195.0/24JapanAS7660Asia Pacific Advanced Network - Japan000.00%
203.181.196.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.197.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.198.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.199.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.200.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.201.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.202.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.203.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.204.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.205.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.206.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.207.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.208.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.209.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.210.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.211.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.212.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.213.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics200.78%
203.181.214.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.215.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.216.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics1204.69%
203.181.217.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics100.39%
203.181.218.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.219.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.220.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.221.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics200.78%
203.181.222.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.223.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.224.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics301.17%
203.181.225.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics200.78%
203.181.226.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.227.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.228.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.229.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.230.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.231.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.232.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics100.39%
203.181.233.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.234.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.235.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics100.39%
203.181.236.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics1305.08%
203.181.237.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics501.95%
203.181.238.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.239.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics401.56%
203.181.240.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.241.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics702.73%
203.181.242.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.243.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics301.17%
203.181.244.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.245.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.246.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.247.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics100.39%
203.181.248.0/24JapanAS7660Asia Pacific Advanced Network - Japan000.00%
203.181.249.0/24JapanAS7660Asia Pacific Advanced Network - Japan000.00%
203.181.250.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.251.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.252.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics200.78%
203.181.253.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.254.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics000.00%
203.181.255.0/24JapanAS2907Research Organization of Information and Systems, National Institute of Informatics1907.42%
00 · Evaluate

Test the real build first.

An evaluation license puts a full current build in your hands, with 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 rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.