Data as of Nov 13, 2026
128.31.0.0/24
1 anonymizer address · 0.39% · Tor exit1 residential-proxy exit · 30 daysMassachusetts Institute of Technology
Residential-proxy exits
Proxy exits
1
0.39% of its addresses · 30 days
Oct 14, 2026 – Nov 12, 2026
Exits seen per day
62 observations
IPv4 market
Path
1 · Holder
2 · Leased from
not leased
Operators, sellers and brokers
Tor
| Name | Parent | In 128.31.0.0/24 | /24s |
|---|---|---|---|
| Tor | The Tor Project | 10.39% | 1 |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 128.31.0.0/16 | 65,536 | MIT-RES | Massachusetts Institute of Technology (MIT-2) · US | Direct Allocation | May 27, 1983 | arin-mit-security@ |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
256 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Business | 255 | >99% | 2 | |
| Tor exitanonymizer | 1 | 0.39% | 1 |
Network & registry
Announced by
Covering announcement 128.30.0.0/15
- Prefix
- 128.30.0.0/15
- Announced by
- AS3 Massachusetts Institute of Technology
- Type
- Business
- Anonymizer addresses
- 1 addresses · <0.01%Tor exit
- Operator
- operated by Tor
- Proxy exits
- 5
- RPKI
- No RPKI
- RIR
- ARIN
IPv4 market
Holder
- Organization
- Not stated by the registry
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
Whois
Registration for this announcement
128.30.0.0/15 spans several registrations: 2 records are listed under Registrations.
- RIR
- ARIN
- Country
- US
- Delegated
- May 27, 1983
- Status
- assigned