Data as of Nov 11, 2026
154.3.129.0/24
No anonymizer space · no proxy exits in 30 daysCharles River Operation · reallocated from Cogent Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 154.3.0.0/16 since Sep 2006 | AS174 | Internet provider | 436 199 always on | Cogent Communications, 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 |
|---|---|---|---|---|---|---|
| 154.3.0.0/16 | 65,536 | COGENT-154-3-16 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Feb 5, 1992 | abuse@ |
| └ 154.3.129.0/24 | 256 | CHARLES-RIVER-CGNT-NET-3 | Charles River Operation (JC-328) · US | Reallocated | Nov 15, 2021 | support@ |
Network & registry
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 154.
3. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Feb 5, 1992
- Legacy
- yes
- Reallocated to
- Charles River Operation (JC-328)
- Reallocated range
- 154.
3. 129. 0/ 24 - Reallocated
- Nov 15, 2021
Origin network
AS64249
US
- Name
- Charles River Operation
- Type
- Hosting
- Registered
- Apr 8, 2016
- Domain
- endoffice.com
- Website
- endoffice.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 4
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jan 2021
- Current origin since
- Jan 2021 · 5.8 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS64249 | RADB | Proxy-registered route object | MAINT-AS27552 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 154.
3. 129. 0/ 24 - Netname
- CHARLES-RIVER-CGNT-NET-3
- Registrant
- Charles River Operation
- Organization
- Charles River Operation (JC-328)
- Org address
- 6 Liberty Sq., Ste. 170, Boston, MA, 02109
- Org country
- US
- Type
- Reallocated
- Handle
- NET-154-3-129-0-1
- Parent
- NET-154-3-0-0-1
- Created
- Nov 15, 2021
- RIR
- ARIN
- Country
- US
- Delegated
- Feb 5, 1992
- Status
- assigned
Report abuse
Abuse contact
- support@
endoffice. com - Name
- Jay Copson
- Phone
- +1-978-344-2656
- Handle
- COPSO-ARIN