LAYER3 INTEL
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Data as of Nov 10, 2026
Autonomous system

AS37917

University of Tsukuba

Announces 132,096 addresses in 3 prefixes. None of it is anonymizer space.

Type
Education
JP
Proxy activity, 30 days
76 exits

Announced prefixes

All 3
Arrived
PrefixTypeProxy exitsHolderRPKI
130.158.0.0/16
since Jul 2007
Business5
1 always on
133.51.0.0/16
since Jul 2007
Business67Japan Network Information Center
163.220.252.0/22
since Oct 2016
Business

Residential-proxy exposure

Always-on exits
1
1.3% of its exits
Spread
25
/24s with at least one exit
Providers
35
selling exits here

/24s with the most always-on exits

/24Always-on exitsProxy exits
130.158.15.0/2411
133.51.114.0/2408
133.51.115.0/2408
133.51.112.0/2407
133.51.91.0/2405
133.51.119.0/2405
133.51.122.0/2404
133.51.84.0/2404
133.51.113.0/2404
133.51.93.0/2404
133.51.117.0/2403
133.51.90.0/2403
133.51.118.0/2402
133.51.127.0/2402
133.51.172.0/2402
133.51.69.0/2401
133.51.85.0/2401
133.51.79.0/2401
133.51.116.0/2401
133.51.78.0/2401
133.51.68.0/2401
130.158.247.0/2401
130.158.228.0/2401
130.158.49.0/2401

Proxy providers listing exits

  • 2Captcha
  • Ake.net
  • BirdProxies
  • ByteProxies
  • Byteful
  • CliProxy
  • EnigmaProxy
  • FastProxy
  • FlashProxy
  • FlexyProxies
  • GSocks
  • Geonix
  • GonzoProxy
  • IPFly
  • IPOasis
  • Infatica
  • LemonBright
  • LudaxProxy
  • MangoProxy
  • NodeMaven
  • NodeProxy
  • NovaProxy
  • Proxiware
  • Proxy-Seller
  • ProxyEmpire
  • Proxyma
  • PuraRoute
  • RainProxy
  • Shifter
  • VantageProxies
  • VibeProxies
  • VitalExclusive
  • VitalProxy
  • ZENPROXY_LITE
  • ZENPROXY_PREMIUM

Proxy activity

Oct 11, 2026 – Nov 9, 2026

AS37917, day by day

718 observations

Network & history

NetworkHistory
Routing patterns

How its announcements have moved

Arrivals

Year each prefix's current origin began announcing it