Data as of Nov 7, 2026
133.51.85.0/24
1 residential-proxy exit · 30 daysUniversity of Tsukuba · 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 8, 2026 – Nov 6, 2026
Exits seen per day
3 observations
Proxy providers listing exits
- RainProxy
- Shifter
Network & registry
Announced by
Covering announcement 133.51.0.0/16
- Prefix
- 133.51.0.0/16
- Announced by
- AS37917 University of Tsukuba
- Type
- Business
- Proxy exits
- 64
- RPKI
- No RPKI
- Netname
- JPNIC-NET-JP-ERX
- Registrant
- Japan Network Information Center
- RIR
- APNIC
Origin network
AS37917
JP
- Name
- University of Tsukuba
- Type
- Education
- Registered
- Jan 30, 2006
- Domain
- tsukuba.ac.jp
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 133.51.0.0/16
133.51.0.0/16
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Jul 2007 · 19 yr
- Origin networks
- 2
- Last change of origin
- Jul 2007
Recorded history
History
- Handoffs
- 1
IRR
Route objects on 133.51.0.0/16
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS37917 | JPIRR | University of Tsukuba | MAINT-AS37917 | Sep 1, 2026 |
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