Data as of Nov 5, 2026
204.217.152.0/23
Anonymizer · Datacenter proxyCogent Communications, LLC
IPv4 market
Path
4 · Use
Datacenter proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 204.217.152.0/23 | /24s |
|---|---|---|
| Aventice | 512100% | 2 |
Leased from
Owners leasing their own space
| Name | In 204.217.152.0/23 | /24s |
|---|---|---|
| Cogent Communications, LLC | 512100% | 2 |
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 204.217.152.0/24 since Jul 2025 | AS9009 | Datacenter proxy | IP broker Aventice | Cogent Communications, LLC via Aventice LLC | |
| 204.217.153.0/24 since Jul 2025 | AS9009 | Datacenter proxy | IP broker Aventice | Cogent Communications, LLC via Aventice LLC |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 204.217.0.0/16 | 65,536 | COGENT-204-217-16 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Dec 29, 1994 | abuse@ |
| └ 204.217.128.0/17 | 32,768 | NET-204-217-128-0-1 | Aventice LLC (AL-584) · US | Reallocated | Nov 26, 2021 | abuse@ |
Network & registry
Announced by
Covering announcement 204.217.0.0/16
- Prefix
- 204.217.0.0/16
- Announced by
- AS174 Cogent Communications, LLC
- Type
- Internet provider
- Anonymizer addresses
- 4,352 addresses · 6.6%ISP proxy
- Leased from
- IP broker Aventice (part)
- RPKI
- No RPKI
- Netname
- COGENT-204-217-16
- Registrant
- Cogent Communications, LLC
- RIR
- ARIN
Origin network
AS174
US
- Name
- Cogent Communications, LLC
- Type
- Internet provider
- Registered
- May 16, 1996
- Domain
- cogentco.com
- Website
- www.cogentco.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 1,658
Routing timeline
Who has announced 204.217.0.0/16
204.217.0.0/16
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on 204.217.0.0/16
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS174 | RADB | Cogent | MAINT-AS174 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 204.
217. 0. 0/ 16 - Netname
- COGENT-204-217-16
- Registrant
- Cogent Communications, LLC
- Organization
- Cogent Communications, LLC (COGC)
- Org address
- 2450 N Street NW, Washington, DC, 20037
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-204-217-0-0-1
- Parent
- NET-204-0-0-0-0
- Created
- Dec 29, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 29, 1994
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN