Data as of Nov 7, 2026
206.176.0.0/21
No anonymizer space · no proxy exits in 30 daysUniversity of South Dakota · space held by South Dakota State Government
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 206.176.0.0/20 since Sep 2005 | AS11736 | Business | 1 | South Dakota State Government |
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 |
|---|---|---|---|---|---|---|
| 206.176.0.0/17 | 32,768 | DDNNET-BLK-1 | South Dakota State Government (SDSG) · US | Direct Allocation | Oct 26, 1995 | Jeff. |
| └ 206.176.0.0/20 | 4,096 | SDNET-BLK2-0-15 | University of South Dakota (USD-1) · US | Reassigned | Dec 1, 1995 | helpdesk@ |
Network & registry
Registry
Holder
- Organization
- South Dakota State Government
- Handle
- SDSG
- Range
- 206.
176. 0. 0/ 17 - Registration type
- Direct Allocation
- Record created
- Oct 26, 1995
- Legacy
- yes
Origin network
AS11736
US
- Name
- University of South Dakota
- Type
- Education
- Registered
- Dec 3, 1998
- Domain
- usd.edu
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2009
- Current origin since
- Feb 2026 · 8 mo
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 206.176.0.0/20 | AS11736 | /24 | ARIN | RPKI valid |
| 206.176.0.0/17 | AS14263 | /24 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS11736 | ARIN | State of South Dakota - RIS | MNT-SDSG | Sep 24, 2021 |
Whois
Registration for this announcement
- Range
- 206.
176. 0. 0/ 20 - Netname
- SDNET-BLK2-0-15
- Registrant
- University of South Dakota
- Organization
- University of South Dakota (USD-1)
- Org address
- 414 E. Clark Street, Vermillion, SD, 57069
- Org country
- US
- Type
- Reassigned
- Handle
- NET-206-176-0-0-2
- Parent
- NET-206-176-0-0-1
- Created
- Dec 1, 1995
- RIR
- ARIN
- Country
- US
- Delegated
- Oct 26, 1995
- Status
- assigned
Report abuse
Abuse contact
- Cheryl.
Tiahrt@ usd. edu - Name
- Tiahrt, Cheryl
- Phone
- +1-605-658-6000
- Handle
- CT509-ARIN