$ query “AS17676” --type=asn → 1 result(s)

AS17676 · GIGAINFRA

SoftBank Corp.

AS17676 is run by SoftBank Corp. and is a major transit provider, based in Japan. The system announces a whopping 38.2 million IPv4 addresses (1.03% of routable IPv4 space), including a /10, and supports IPv6. Most of its address space is geolocated to Japan, with additional presence in Australia and Hong Kong SAR China, and a smaller footprint in another country. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • Space Overlord — Over 10 million IPv4 addresses
  • #2 in Japan — Top 10 by reach within country

Basic Information

Country
🇯🇵 Japan
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
August 10, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
475 / 138
IPv6 Prefixes (raw / aggregated)
3 / 3
IPv4 Addresses
38 249 216
Largest IPv4 Prefix
/10 (4 194 304 addresses)
Largest IPv6 Prefix
/20
Geolocated Countries
🇯🇵 Japan (53 117 952 IPs), 🇦🇺 Australia (5 242 880 IPs), 🇭🇰 Hong Kong SAR China (1 024 IPs) and 1 more
Prefix Changed
August 08, 2026

Reputation

Reputation
Good — 11 flagged IPs out of 38 249 216 total (0.00%)

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
118 networks exchanging traffic without transit
Downstream Customers
194 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
317 unique BGP neighbors
Reach
39 421 networks in customer cone

Upstream Providers (4)

  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS701 — UUNET (Tier-1 transit)
  • AS3491 — PCCWG-AS (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (475 total)

  • 60.64.0.0/10 (4 194 304 addresses (/10 prefix))
  • 221.64.0.0/11 (2 097 152 addresses (/11 prefix))
  • 219.32.0.0/11 (2 097 152 addresses (/11 prefix))
  • 126.64.0.0/11 (2 097 152 addresses (/11 prefix))
  • 60.128.0.0/11 (2 097 152 addresses (/11 prefix))
  • 126.112.0.0/12 (1 048 576 addresses (/12 prefix))
  • 221.48.0.0/12 (1 048 576 addresses (/12 prefix))
  • 221.96.0.0/12 (1 048 576 addresses (/12 prefix))
  • 218.128.0.0/12 (1 048 576 addresses (/12 prefix))
  • 221.16.0.0/12 (1 048 576 addresses (/12 prefix))
  • 126.0.0.0/12 (1 048 576 addresses (/12 prefix))
  • 219.192.0.0/12 (1 048 576 addresses (/12 prefix))
  • 219.176.0.0/12 (1 048 576 addresses (/12 prefix))
  • 126.144.0.0/12 (1 048 576 addresses (/12 prefix))
  • 126.32.0.0/12 (1 048 576 addresses (/12 prefix))
  • 219.16.0.0/12 (1 048 576 addresses (/12 prefix))
  • 218.112.0.0/12 (1 048 576 addresses (/12 prefix))
  • 126.232.0.0/13 (524 288 addresses (/13 prefix))
  • 126.168.0.0/13 (524 288 addresses (/13 prefix))
  • 36.240.0.0/13 (524 288 addresses (/13 prefix))
  • 126.56.0.0/13 (524 288 addresses (/13 prefix))
  • 221.32.0.0/13 (524 288 addresses (/13 prefix))
  • 219.208.0.0/13 (524 288 addresses (/13 prefix))
  • 219.168.0.0/13 (524 288 addresses (/13 prefix))
  • 218.176.0.0/13 (524 288 addresses (/13 prefix))
  • 126.160.0.0/14 (262 144 addresses (/14 prefix))
  • 126.128.0.0/14 (262 144 addresses (/14 prefix))
  • 111.188.0.0/14 (262 144 addresses (/14 prefix))
  • 114.48.0.0/14 (262 144 addresses (/14 prefix))
  • 126.184.0.0/14 (262 144 addresses (/14 prefix))
  • 1.112.0.0/14 (262 144 addresses (/14 prefix))
  • 126.204.0.0/14 (262 144 addresses (/14 prefix))
  • 126.140.0.0/14 (262 144 addresses (/14 prefix))
  • 126.212.0.0/14 (262 144 addresses (/14 prefix))
  • 126.176.0.0/14 (262 144 addresses (/14 prefix))
  • 126.216.0.0/14 (262 144 addresses (/14 prefix))
  • 126.20.0.0/14 (262 144 addresses (/14 prefix))
  • 126.24.0.0/14 (262 144 addresses (/14 prefix))
  • 126.108.0.0/14 (262 144 addresses (/14 prefix))
  • 221.40.0.0/14 (262 144 addresses (/14 prefix))
  • 126.252.0.0/14 (262 144 addresses (/14 prefix))
  • 126.48.0.0/14 (262 144 addresses (/14 prefix))
  • 126.196.0.0/15 (131 072 addresses (/15 prefix))
  • 126.166.0.0/15 (131 072 addresses (/15 prefix))
  • 126.54.0.0/15 (131 072 addresses (/15 prefix))
  • 126.248.0.0/15 (131 072 addresses (/15 prefix))
  • 126.240.0.0/15 (131 072 addresses (/15 prefix))
  • 126.224.0.0/15 (131 072 addresses (/15 prefix))
  • 126.102.0.0/15 (131 072 addresses (/15 prefix))
  • 126.220.0.0/15 (131 072 addresses (/15 prefix))

IPv6 Prefixes (3 total)

  • 2400:2000::/20
  • 2403:9900::/24
  • 2403:7a00::/32