Data as of Nov 7, 2026
204.100.200.0/21
No anonymizer space · no proxy exits in 30 daysRiverside County Office of Education · space held by County of Riverside
Announcements
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 204.100.200.0/24 since Jul 2022 | AS18558 | Business | County of Riverside | |
| 204.100.201.0/24 since Jul 2022 | AS18558 | Business | County of Riverside | |
| 204.100.202.0/24 since Jul 2022 | AS18558 | Business | County of Riverside | |
| 204.100.203.0/24 since Jul 2022 | AS18558 | Business | County of Riverside | |
| 204.100.204.0/24 since Apr 2021 | AS18558 | Business | County of Riverside | |
| 204.100.205.0/24 since May 2005 | AS18558 | Business | County of Riverside | |
| 204.100.206.0/24 since May 2005 | AS18558 | Business | County of Riverside | |
| 204.100.207.0/24 since May 2005 | AS18558 | Business | County of Riverside |
Network & registry
Announced by
Covering announcement 204.100.0.0/16
- Prefix
- 204.100.0.0/16
- Announced by
- AS18558 Riverside County Office of Education
- Type
- Business
- Proxy exits
- 14
- RPKI
- No RPKI
- Netname
- RCOEK-12NET
- Registrant
- County of Riverside
- RIR
- ARIN
Origin network
AS18558
US
- Name
- Riverside County Office of Education
- Type
- Education
- Registered
- Sep 12, 2000
- Domain
- rcoe.us
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 204.100.0.0/16
204.100.0.0/16
Routing history
- Pattern
- Stable
- First seen
- Aug 2007
- Current origin since
- Aug 2007 · 19 yr
- Origin networks
- 1
IRR
Route objects on 204.100.0.0/16
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS18558 | RADB | Riverside County | MAINT-AS2150 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 204.
100. 0. 0/ 16 - Netname
- RCOEK-12NET
- Registrant
- County of Riverside
- Organization
- County of Riverside (COUNTY-20)
- Org address
- Information Technology Services, Riverside, CA, 92502
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-204-100-0-0-1
- Parent
- NET-204-0-0-0-0
- Created
- Jul 13, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- Jul 13, 1994
- Status
- assigned
Report abuse
Abuse contact
- dwilkinson@
rcoe. us - Name
- Wilkinson, David
- Phone
- +1-951-826-6560
- Handle
- WILKI325-ARIN