LAYER3 INTEL
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Data as of Nov 6, 2026

133.51.0.0/16

57 residential-proxy exits · 30 days

University of Tsukuba · space held by Japan Network Information Center

Announcement
this exact prefix
No RPKI
Announced by
AS37917
Type
Business
Risk
0 / 100 · Low

Residential-proxy exits

Proxy exits
57
0.09% of its addresses · 30 days
Spread
18 of 256
/24s with at least one exit
Providers
8
selling exits here
Oct 7, 2026 – Nov 5, 2026

Exits seen per day

217 observations

/24s with the most always-on exits

/24Always-on exitsProxy exits
133.51.115.0/24010
133.51.112.0/2407
133.51.114.0/2407
133.51.119.0/2404
133.51.84.0/2404
133.51.113.0/2404
133.51.93.0/2404
133.51.117.0/2403
133.51.91.0/2403
133.51.122.0/2403
133.51.90.0/2402
133.51.116.0/2402
133.51.118.0/2402
133.51.127.0/2402
133.51.172.0/2402
133.51.85.0/2401
133.51.78.0/2401
133.51.79.0/2401

Proxy providers listing exits

  • EnigmaProxy
  • IPFly
  • NovaProxy
  • ProxyEmpire
  • PuraRoute
  • RainProxy
  • Shifter
  • VantageProxies

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS37917

JP
Name
University of Tsukuba
Type
Education
Registered
Jan 30, 2006
Domain
tsukuba.ac.jp
Spamhaus ASN-DROP
not listed