Data as of Nov 10, 2026
146.189.21.0/24
No anonymizer space · no proxy exits in 30 daysUniversity of Massachusetts Medical School
Network & registry
Announced by
Covering announcement 146.189.0.0/16
- Prefix
- 146.189.0.0/16
- Announced by
- AS5724 University of Massachusetts Medical School
- Type
- Business
- Proxy exits
- 1
- RPKI
- No RPKI
- Netname
- UMASSMED
- Registrant
- University of Massachusetts Medical School
- RIR
- ARIN
Origin network
AS5724
US
- Name
- University of Massachusetts Medical School
- Type
- Education
- Registered
- Sep 6, 1995
- Domain
- umassmed.edu
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 146.189.0.0/16
146.189.0.0/16
Routing history
- Pattern
- Rotating
- First seen
- May 2005
- Current origin since
- May 2024 · 2.5 yr
- Origin networks
- 2
- Last change of origin
- May 2024
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 146.
189. 0. 0/ 16 - Netname
- UMASSMED
- Registrant
- University of Massachusetts Medical School
- Organization
- University of Massachusetts Medical School (UMMC-1-Z)
- Org address
- 55 Lake Avenue North, Worcester, MA, 01655
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-146-189-0-0-1
- Parent
- NET-146-0-0-0-0
- Created
- Feb 26, 1991
- RIR
- ARIN
- Country
- US
- Delegated
- Feb 26, 1991
- Status
- assigned
Report abuse
Abuse contact
- nobody@
example. com - Name
- No, Contact Known
- Phone
- +1-800-555-1234
- Handle
- CKN23-ARIN