Data as of Nov 8, 2026
146.189.0.0/16
2 residential-proxy exits · 30 daysUniversity of Massachusetts Medical School
Residential-proxy exits
Proxy exits
2
<0.01% of its addresses · 30 days
Spread
1 of 256
/24s with at least one exit
Providers
2
selling exits here
Oct 9, 2026 – Nov 7, 2026
Exits seen per day
13 observations
Proxy providers listing exits
- ColaProxy
- Thordata
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 146.189.25.0/24 since Nov 2024 | AS5724 | Business | University of Massachusetts Medical School | |
| 146.189.26.0/24 since Nov 2024 | AS5724 | Business | University of Massachusetts Medical School | |
| 146.189.128.0/21 since Oct 2024 | AS5724 | Business | University of Massachusetts Medical School |
Network & registry
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 this prefix
Summary
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