Data as of Nov 8, 2026
154.39.2.0/24
No anonymizer space · no proxy exits in 30 daysCharles River Operation · reallocated from Cogent Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | RPKI |
|---|---|---|---|---|---|
| 154.36.0.0/14 since Sep 2006 | AS174 | Internet provider | IP broker Aventice (part) | 2,134 370 always on |
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 |
|---|---|---|---|---|---|---|
| 154.39.0.0/16 | 65,536 | COGENT-154-39-16 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Feb 5, 1992 | abuse@ |
| └ 154.39.2.0/24 | 256 | CHARLES-RIVER-CGNT-NET-2 | Charles River Operation (JC-328) · US | Reallocated | Aug 9, 2021 | support@ |
Network & registry
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 154.
39. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Feb 5, 1992
- Legacy
- yes
- Reallocated to
- Charles River Operation (JC-328)
- Reallocated range
- 154.
39. 2. 0/ 24 - Reallocated
- Aug 9, 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
- Jul 2019
- Current origin since
- Aug 2021 · 5.2 yr
- Origin networks
- 2
- Last change of origin
- Aug 2021
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 154.
39. 2. 0/ 24 - Netname
- CHARLES-RIVER-CGNT-NET-2
- 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-154-39-2-0-1
- Parent
- NET-154-39-0-0-1
- Created
- Aug 9, 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