Data as of Nov 13, 2026
206.187.80.0/22
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by SirsiDynix
Announcement
this exact prefix
RPKI valid
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 the announcement: those covering it, widest first, then every record inside it, 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
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 this prefix
Summary
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
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 206.187.80.0/24 | AS1746 | RADB | SLC Customer | MAINT-AS13767 | Nov 13, 2023 |
| 206.187.81.0/24 | AS1746 | RADB | SLC Customer | MAINT-AS13767 | Nov 13, 2023 |
| 206.187.82.0/24 | AS1746 | RADB | SLC Customer | MAINT-AS13767 | Nov 13, 2023 |
| 206.187.83.0/24 | AS1746 | RADB | SLC Customer | MAINT-AS13767 | Nov 13, 2023 |
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