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Data as of Nov 13, 2026

128.31.0.0/16

1 anonymizer address · <0.01% · Tor exit5 residential-proxy exits · 30 days

Massachusetts Institute of Technology

Announcement
128.30.0.0/15
No RPKI
Announced by
AS3
Type
Business
>99% of it

Residential-proxy exits

Proxy exits
5
<0.01% of its addresses · 30 days
Spread
2 of 256
/24s with at least one exit
Providers
7
selling exits here
Oct 14, 2026 – Nov 12, 2026

Exits seen per day

77 observations
  • Tor exit · anonymizer
  • Business

/24s with the most always-on exits

/24Always-on exitsProxy exits
128.31.33.0/2402
128.31.35.0/2402

Proxy providers listing exits

  • AnyIP
  • EnigmaProxy
  • LemonBright
  • NovaProxy
  • ProxyEmpire
  • ThunderProxy
  • VantageProxies
IPv4 market

Path

1 · Holder
Unnamed holder
2 · Leased from
not leased
3 · Announced by
AS3 Massachusetts Institute of Technology
since Jul 2005 · 21.4 yr ago
4 · Use
named Tor
Business

Operators, sellers and brokers

Tor

NameParentIn 128.31.0.0/16/24s
TorThe Tor Project
1<0.01%
1

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
128.31.0.0/1665,536MIT-RESMassachusetts Institute of Technology (MIT-2) · USDirect AllocationMay 27, 1983arin-mit-security@mit.edu

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

65,536 addresses
TypeAddressesShareRanges
Business65,535>99%2
Tor exitanonymizer1<0.01%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Routing timeline

Who has announced 128.30.0.0/15

128.30.0.0/15

Routing history

Pattern
Stable
First seen
May 2005
Current origin since
Jul 2005 · 21 yr
Origin networks
2
Last change of origin
Jul 2005
Recorded history

History

Handoffs
1