$ query “AS17511” --type=asn → 1 result(s)

AS17511 · OPTAGE

OPTAGE Inc.

AS17511 is owned by OPTAGE Inc. and is a mid-size transit provider, based in Japan. The system announces an impressive 3.0 million IPv4 addresses, including a /13, and supports IPv6. Most of its address space is geolocated to Japan, with additional presence in Australia.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇯🇵 Japan
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
April 29, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
66 / 58
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
2 994 688
Largest IPv4 Prefix
/13 (524 288 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇯🇵 Japan (5 573 888 IPs), 🇦🇺 Australia (65 536 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Good — 7 flagged IPs out of 2 994 688 total (0.00%)

Connectivity Summary

Upstream Providers
5 upstreams providing transit
Peers
40 networks exchanging traffic without transit
Downstream Customers
10 downstreams buying transit
Degree
55 unique BGP neighbors
Reach
10 networks in customer cone

Upstream Providers (5)

Prefix Lists

IPv4 Prefixes (66 total)

  • 121.80.0.0/13 (524 288 addresses (/13 prefix))
  • 182.164.0.0/14 (262 144 addresses (/14 prefix))
  • 119.228.0.0/14 (262 144 addresses (/14 prefix))
  • 101.140.0.0/14 (262 144 addresses (/14 prefix))
  • 180.144.0.0/14 (262 144 addresses (/14 prefix))
  • 58.188.0.0/14 (262 144 addresses (/14 prefix))
  • 112.68.0.0/14 (262 144 addresses (/14 prefix))
  • 60.56.0.0/15 (131 072 addresses (/15 prefix))
  • 58.70.0.0/16 (65 536 addresses (/16 prefix))
  • 59.190.0.0/16 (65 536 addresses (/16 prefix))
  • 128.22.0.0/16 (65 536 addresses (/16 prefix))
  • 150.57.0.0/16 (65 536 addresses (/16 prefix))
  • 128.27.0.0/16 (65 536 addresses (/16 prefix))
  • 160.233.0.0/16 (65 536 addresses (/16 prefix))
  • 158.198.0.0/16 (65 536 addresses (/16 prefix))
  • 150.66.0.0/16 (65 536 addresses (/16 prefix))
  • 218.228.128.0/17 (32 768 addresses (/17 prefix))
  • 219.122.128.0/17 (32 768 addresses (/17 prefix))
  • 219.75.128.0/17 (32 768 addresses (/17 prefix))
  • 218.251.0.0/17 (32 768 addresses (/17 prefix))
  • 218.42.192.0/18 (16 384 addresses (/18 prefix))
  • 203.140.64.0/19 (8 192 addresses (/19 prefix))
  • 61.205.96.0/19 (8 192 addresses (/19 prefix))
  • 219.122.32.0/19 (8 192 addresses (/19 prefix))
  • 61.195.96.0/19 (8 192 addresses (/19 prefix))
  • 202.216.48.0/20 (4 096 addresses (/20 prefix))
  • 202.60.32.0/20 (4 096 addresses (/20 prefix))
  • 61.122.240.0/20 (4 096 addresses (/20 prefix))
  • 61.205.0.0/20 (4 096 addresses (/20 prefix))
  • 61.205.80.0/20 (4 096 addresses (/20 prefix))
  • 61.213.128.0/20 (4 096 addresses (/20 prefix))
  • 218.45.96.0/20 (4 096 addresses (/20 prefix))
  • 210.199.80.0/20 (4 096 addresses (/20 prefix))
  • 203.175.80.0/20 (4 096 addresses (/20 prefix))
  • 202.8.48.0/20 (4 096 addresses (/20 prefix))
  • 122.100.24.0/21 (2 048 addresses (/21 prefix))
  • 192.51.144.0/21 (2 048 addresses (/21 prefix))
  • 103.97.232.0/21 (2 048 addresses (/21 prefix))
  • 103.84.124.0/22 (1 024 addresses (/22 prefix))
  • 103.112.180.0/22 (1 024 addresses (/22 prefix))
  • 138.248.64.0/22 (1 024 addresses (/22 prefix))
  • 202.26.228.0/22 (1 024 addresses (/22 prefix))
  • 103.199.132.0/22 (1 024 addresses (/22 prefix))
  • 219.100.52.0/22 (1 024 addresses (/22 prefix))
  • 202.223.48.0/22 (1 024 addresses (/22 prefix))
  • 103.124.200.0/22 (1 024 addresses (/22 prefix))
  • 103.65.208.0/22 (1 024 addresses (/22 prefix))
  • 103.99.124.0/22 (1 024 addresses (/22 prefix))
  • 103.116.152.0/22 (1 024 addresses (/22 prefix))
  • 160.25.92.0/23 (512 addresses (/23 prefix))
  • and 8 more

IPv6 Prefixes (1 total)

  • 2001:ce8::/32