Data as of Nov 9, 2026
146.203.135.0/24
No anonymizer space · no proxy exits in 30 daysMount Sinai School of Medicine
Network & registry
Announced by
Covering announcement 146.203.128.0/21
- Prefix
- 146.203.128.0/21
- Announced by
- AS11452 Mount Sinai School of Medicine
- Type
- Business
- Proxy exits
- 4
- Always-on exits
- 1
- RPKI
- No RPKI
- Netname
- MSSMEDU-1
- Registrant
- Mount Sinai School of Medicine
- RIR
- ARIN
Origin network
AS11452
US
- Name
- Mount Sinai School of Medicine
- Type
- Education
- Registered
- Aug 27, 1998
- Domain
- mssm.edu
- Industry
- Hospitals and Medical Centers
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 146.203.128.0/21
146.203.128.0/21
Routing history
- Pattern
- Stable
- First seen
- Mar 2009
- Current origin since
- Mar 2009 · 18 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 146.
203. 0. 0/ 16 - Netname
- MSSMEDU-1
- Registrant
- Mount Sinai School of Medicine
- Organization
- Mount Sinai School of Medicine (MSSM)
- Org address
- One Gustave L. Levy Place, New York, NY, 10029-6574
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-146-203-0-0-1
- Parent
- NET-146-0-0-0-0
- Created
- Feb 28, 1991
- RIR
- ARIN
- Country
- US
- Delegated
- Feb 28, 1991
- Status
- assigned
Report abuse
Abuse contact
- andrew.
pizzimenti@ mssm. edu - Name
- Pizzimenti, Andrew
- Phone
- +1-212-241-4929
- Handle
- AP412-ARIN