Data as of Nov 8, 2026
146.225.0.0/21
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by Synopsys Inc.
Network & registry
Origin network
AS8075
US
- Name
- Microsoft Corporation
- Type
- Hosting
- Registered
- Mar 31, 1997
- Domain
- microsoft.com
- Website
- www.microsoft.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2025
- Current origin since
- Aug 2025 · 1.3 yr
- Origin networks
- 1
RPKI
Route origin authorizations
Whois
Registration for this announcement
- Range
- 146.
225. 0. 0/ 16 - Netname
- SYNOPSYS-NET
- Registrant
- Synopsys Inc.
- Organization
- Synopsys Inc. (SYNOPS-Z)
- Org address
- 675 Almanor Ave, Sunnyvale, CA, 94085
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-146-225-0-0-1
- 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
- network-core@
synopsys. com - Name
- NETWORK-TEAM
- Phone
- +1-650-584-4260
- Handle
- NETWO2400-ARIN