Data as of Nov 14, 2026
206.187.83.0/24
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by SirsiDynix
Announced by
Type
Hosting
Risk
50 / 100 · Medium
Recently moved
Recent change
New origin Oct 22, 2026
from AS1746 SirsiDynix, after 3.7 years unannounced
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 206. | 49,152 | SIRSIDYNIX-NET-1 | SirsiDynix (SC-2233) · US | Direct Allocation | Nov 15, 1995 | noc@ |
| └ 206.187.80.0/22 | 1,024 | SAAS-SIRSIDYNIX-NADR | SAAS SirsiDynix (C11713627) · US | Reassigned | Sep 18, 2026 | noc@ via SIRSIDYNIX-NET-1 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Announced by
Covering announcement 206.187.80.0/22
- Prefix
- 206.187.80.0/22
- Announced by
- AS8075 Microsoft Corporation
- Type
- Hosting
- RPKI
- RPKI valid
- Netname
- SAAS-SIRSIDYNIX-NADR
- Registrant
- SAAS SirsiDynix
- RIR
- ARIN
Registry
Holder
- Organization
- SirsiDynix
- Handle
- SC-2233
- Range
- 206.
187. 0. 0 - 206. 187. 191. 255 - Registration type
- Direct Allocation
- Record created
- Nov 15, 1995
- Legacy
- yes
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 206.187.80.0/22
206.187.80.0/22
Routing history
- Pattern
- Reactivated
- First seen
- Apr 2021
- Current origin since
- Oct 22, 2026 · under a month
- Origin networks
- 2
- Last change of origin
- Oct 22, 2026
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 206.187.80.0/22 | AS1746 | /24 | ARIN | Another network |
| 206.187.80.0/22 | AS8075 | /24 | ARIN | RPKI valid |
IRR
Route objects on 206.187.80.0/22
Whois
Registration for this announcement
- Range
- 206.
187. 80. 0/ 22 - Netname
- SAAS-SIRSIDYNIX-NADR
- Registrant
- SAAS SirsiDynix
- Organization
- SAAS SirsiDynix (C11713627)
- Type
- Reassigned
- Handle
- NET-206-187-80-0-1
- Parent
- NET-206-187-0-0-1
- Created
- Sep 18, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Nov 15, 1995
- Status
- assigned
Report abuse
Abuse contact
- noc@
sirsidynix. com - Name
- Network Operations Center
- Phone
- +1-801-223-5200
- Handle
- NOC1883-ARIN