Data as of Nov 7, 2026
137.164.220.0/24
No anonymizer space · no proxy exits in 30 daysCENIC
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
0 / 100 · Low
Recent change
New origin Nov 4, 2026
its first announcement on record
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 137.164.0.0/16 since May 2005 | AS2152 | Business | 20 | CENIC |
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 |
|---|---|---|---|---|---|---|
| 137.164.0.0/16 | 65,536 | CALREN | CENIC (CENIC) · US | Direct Allocation | Dec 21, 1989 | abuse@ |
| └ 137.164.220.0/24 | 256 | AMA-COE-220 | Amador County Unified School District (C01491521) · US | Reassigned | Nov 9, 2006 | abuse@ via CALREN |
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
- CENIC
- Handle
- CENIC
- Range
- 137.
164. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Dec 21, 1989
- Legacy
- yes
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Nov 4, 2026
- Current origin since
- Nov 4, 2026 · under a month
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 137.
164. 220. 0/ 24 - Netname
- AMA-COE-220
- Registrant
- Amador County Unified School District
- Organization
- Amador County Unified School District (C01491521)
- Type
- Reassigned
- Handle
- NET-137-164-220-0-1
- Parent
- NET-137-164-0-0-1
- Created
- Nov 9, 2006
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 21, 1989
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cenic. org - Name
- CENIC Abuse
- Phone
- +1-714-220-3494
- Handle
- ABUSE711-ARIN