Data as of Nov 8, 2026
204.120.64.0/18
Anonymizer · ISP proxyCogent Communications, LLC
IPv4 market
Path
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 204.120.64.0/18 | /24s |
|---|---|---|
| Rackdog | 16,384100% | 64 |
Leased from
Owners leasing their own space
| Name | In 204.120.64.0/18 | /24s |
|---|---|---|
| Cogent Communications, LLC | 16,384100% | 64 |
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 204.120.64.0/20 since Sep 2025 | AS7459 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 204.120.80.0/20 since Sep 2025 | AS7459 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 204.120.96.0/20 since Sep 2025 | AS7459 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 204.120.112.0/20 since Sep 2025 | AS7459 | ISP proxy | IP broker Rackdog | Cogent Communications, 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. | 262,144 | COGC | Cogent Communications, LLC (COGC) · US | Direct Allocation | Aug 12, 1994 | abuse@ |
| └ 204.120.64.0/18 | 16,384 | RACKDOG-CGNT-NET-28 | RCN (C11605223) · US | Reassigned | May 27, 2026 | abuse@ via COGC |
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
Announced by
Covering announcement 204.120.0.0/16
- Prefix
- 204.120.0.0/16
- Announced by
- AS174 Cogent Communications, LLC
- Type
- Internet provider
- Anonymizer addresses
- none
- RPKI
- No RPKI
- Netname
- COGC
- 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 204.120.0.0/16
204.120.0.0/16
Routing history
- Pattern
- Rotating
- First seen
- May 2005
- Current origin since
- May 2024 · 2.5 yr
- Origin networks
- 2
- Last change of origin
- May 2024
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 204.
117. 0. 0 - 204. 120. 255. 255 - Netname
- COGC
- 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-204-117-0-0-1
- Parent
- NET-204-0-0-0-0
- Created
- Aug 12, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 12, 1994
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN