Data as of Nov 6, 2026
133.31.87.0/24
1 residential-proxy exit · 30 daysTokyo University of Science · space held by Japan Network Information Center
Residential-proxy exits
Proxy exits
1
0.39% of its addresses · 30 days
Providers
2
selling exits here
Oct 7, 2026 – Nov 5, 2026
Exits seen per day
11 observations
Proxy providers listing exits
- RainProxy
- Shifter
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 133.31.0.0/16 since Dec 2010 | AS55390 | Business | 7 | Japan Network Information Center |
Network & registry
Announced by
Covering announcement 133.31.0.0/17
- Prefix
- 133.31.0.0/17
- Announced by
- AS55390 Tokyo University of Science
- Type
- Business
- Proxy exits
- 5
- RPKI
- No RPKI
- Netname
- JPNIC-NET-JP-ERX
- Registrant
- Japan Network Information Center
- RIR
- APNIC
Origin network
AS55390
JP
- Name
- Tokyo University of Science
- Type
- Education
- Registered
- Jan 18, 2010
- Domain
- tus.ac.jp
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
133.31.0.0/17
Routing history
- Pattern
- Stable
- First seen
- Nov 2020
- Current origin since
- Nov 2020 · 6.0 yr
- Origin networks
- 1
IRR
Route objects on 133.31.0.0/17
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS55390 | JPIRR | Tokyo University of Science | MAINT-AS55390 | Oct 2, 2025 |
Whois
Registration for this announcement
- Range
- 133.
0. 0. 0/ 8 - Netname
- JPNIC-NET-JP-ERX
- Registrant
- Japan Network Information Center
- Registrant country
- JP
- Organization
- Japan Network Information Center
- Org country
- JP
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Updated
- Nov 1, 2022
- Maintainer
- APNIC-HM
- RIR
- APNIC
- Country
- JP
- Delegated
- Mar 1, 1997
- Status
- assigned
Report abuse
Abuse contact
- hostmaster@
nic. ad. jp - Name
- ABUSE JPNICJP
- Handle
- AJ382-AP