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AS17511 OPTAGE Inc.

OPTAGE - OPTAGE Inc. · registered in Japan

IPv4 addresses2,994,43261 prefixes · 0.096% of announced IPv4
Rank in Japan#10largest network in JP by IPv4 space, of 724 · 1.86% of JP
Rank worldwide#149of 79,396 networks with IPv4
IPv61 x /32 (65,536 x /48)12 prefixes
CountryJapan745 ASNs registered there
Open AS17511 in ASN lookup Look up an IP in this network (58.70.0.1) All networks in Japan

IPv4 prefixes

All 61 prefixes, in address order.

  • 58.70.0.0/16
  • 58.188.0.0/16
  • 58.189.0.0/17
  • 58.189.128.0/18
  • 58.189.192.0/18
  • 58.190.0.0/15
  • 59.190.0.0/16
  • 60.56.0.0/15
  • 61.122.240.0/20
  • 61.195.96.0/19
  • 61.205.0.0/20
  • 61.205.80.0/20
  • 61.205.96.0/19
  • 61.213.128.0/20
  • 101.140.0.0/14
  • 103.65.208.0/22
  • 103.84.124.0/22
  • 103.95.206.0/24
  • 103.97.232.0/21
  • 103.99.124.0/22
  • 103.112.180.0/22
  • 103.116.152.0/22
  • 103.124.200.0/22
  • 103.142.132.0/23
  • 103.199.132.0/22
  • 112.68.0.0/14
  • 119.228.0.0/14
  • 121.80.0.0/13
  • 122.100.24.0/21
  • 128.22.0.0/16
  • 128.27.0.0/16
  • 138.248.64.0/22
  • 150.57.0.0/16
  • 150.66.0.0/16
  • 158.198.0.0/16
  • 160.25.92.0/23
  • 160.233.0.0/16
  • 180.144.0.0/14
  • 182.164.0.0/14
  • 192.51.144.0/21
  • 202.8.48.0/20
  • 202.19.159.0/24
  • 202.26.228.0/22
  • 202.34.10.0/23
  • 202.34.12.0/23
  • 202.60.32.0/20
  • 202.62.253.0/24
  • 202.216.48.0/20
  • 202.223.48.0/22
  • 202.244.138.0/23
  • 203.140.64.0/19
  • 203.175.80.0/20
  • 210.199.80.0/20
  • 218.42.192.0/18
  • 218.45.96.0/20
  • 218.228.128.0/17
  • 218.251.0.0/17
  • 219.75.128.0/17
  • 219.100.52.0/22
  • 219.122.32.0/19
  • 219.122.128.0/17

IPv6 prefixes

All 12 prefixes.

  • 2001:ce8::/41
  • 2001:ce8:80::/43
  • 2001:ce8:a0::/43
  • 2001:ce8:c0::/42
  • 2001:ce8:100::/40
  • 2001:ce8:200::/39
  • 2001:ce8:400::/38
  • 2001:ce8:800::/37
  • 2001:ce8:1000::/36
  • 2001:ce8:2000::/35
  • 2001:ce8:4000::/34
  • 2001:ce8:8000::/33

Other ASNs named OPTAGE Inc.

2 other networks use the same organisation name; together with AS17511 they announce 3,002,880 IPv4 addresses.

ASNNameIPv4 addresses
AS9358Finder - OPTAGE Inc. JP8,192
AS151379NCJ - OPTAGE Inc. JP256

Similar-sized networks in Japan

ASNNameIPv4 addresses
AS2497#7 IIJ - Internet Initiative Japan Inc.4,094,976
AS2527#8 So-net - Sony Network Communications Inc.3,867,648
AS2518#9 BIGLOBE - BIGLOBE Inc.3,670,016
AS9605#11 docomo - NTT DOCOMO, INC.2,536,448
AS2514#12 InfoSphere - NTT PC Communications, Inc.2,078,976
AS10013#13 FBDC - FreeBit Co.,Ltd.1,944,064

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources