Data as of Nov 9, 2026
163.220.252.0/22
No anonymizer space · no proxy exits in 30 daysUniversity of Tsukuba
Network & registry
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 this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2015
- Current origin since
- Oct 2016 · 10 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS37917 | JPIRR | University of Tsukuba | MAINT-AS37917 | Nov 1, 2026 |
Whois
Registration for this announcement
- Range
- 163.
220. 252. 0/ 22 - Netname
- UTINS-CIDR-BLK-JP
- Registrant
- University of Tsukuba
- Registrant country
- JP
- Organization
- University of Tsukuba
- Org country
- JP
- Created
- Not stated by the registry
- Updated
- Jul 11, 2015
- RIR
- APNIC
- Country
- JP
- Delegated
- Apr 2, 1993
- Status
- assigned