Data as of Nov 14, 2026
209.77.221.0/24
No anonymizer space · no proxy exits in 30 daysOakland Unified School District · space held by AT&T Enterprises, LLC
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
0 / 100 · Low
Recent change
New origin Sep 18, 2026
from AS31764 Oakland Unified School District, after 1.2 years unannounced
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 209.77.220.0/22 since Jul 2021 | AS31764 | Business | AT&T Enterprises, LLC | ||
| 209.76.0.0/14 since Nov 2021 | AS7018 | Residential | 1,112 17 always on | AT&T Enterprises, LLC |
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 |
|---|---|---|---|---|---|---|
| 209.76.0.0/14 | 262,144 | SBCIS-SIS80 | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Apr 29, 1997 | abuse@ |
| └ 209.77.220.0/22 | 1,024 | NET-209-77-220-0-1 | Oakland Unified School District (OAKLA-19) · US | Reassigned | Jul 29, 2021 | — |
Network & registry
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 209.
76. 0. 0/ 14 - Registration type
- Direct Allocation
- Record created
- Apr 29, 1997
- Legacy
- yes
Origin network
AS31764
US
- Name
- Oakland Unified School District
- Type
- Education
- Registered
- Mar 1, 2011
- Domain
- ousd.k12.ca.us
- Website
- www.ousd.org
- 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
- Jun 2017
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 209.
77. 220. 0/ 22 - Netname
- NET-209-77-220-0-1
- Registrant
- Oakland Unified School District
- Organization
- Oakland Unified School District (OAKLA-19)
- Org address
- 1011 Union St, OAKLAND, CA, 94607
- Org country
- US
- Type
- Reassigned
- Handle
- NET-209-77-220-0-1
- Parent
- NET-209-76-0-0-1
- Created
- Jul 29, 2021
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 29, 1997
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN