Data as of Nov 8, 2026
204.181.204.0/24
Anonymizer · ISP proxyCox Communications Inc. · space held by Cogent Communications, LLC
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Jul 2026
from AS7459 Grande Communications Networks, LLC
IPv4 market
Path
Announced by AS22773 since Jul 2026 · 3 mo ago
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 204.181.204.0/24 | /24s |
|---|---|---|
| Rackdog | 256100% | 1 |
Leased from
Owners leasing their own space
| Name | In 204.181.204.0/24 | /24s |
|---|---|---|
| Cogent Communications, LLC | 256100% | 1 |
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 204.180.0.0/14 since May 2024 | AS174 | Internet provider | 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 |
|---|---|---|---|---|---|---|
| 204.180.0.0/14 | 262,144 | COGENT-204-180-0 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Oct 18, 1994 | abuse@ |
| └ 204.181.192.0/18 | 16,384 | RACKDOG-CGNT-NET-29 | RCN (C11605224) · US | Reassigned | May 27, 2026 | abuse@ via COGENT-204-180-0 |
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 204.181.192.0/20
- Prefix
- 204.181.192.0/20
- Announced by
- AS22773 Cox Communications Inc.
- Type
- ISP proxy
- Anonymizer addresses
- all
- Leased from
- IP broker Rackdog
- RPKI
- No RPKI
- Netname
- RACKDOG-CGNT-NET-29
- Registrant
- RCN
- RIR
- ARIN
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 204.
180. 0. 0/ 14 - Registration type
- Direct Allocation
- Record created
- Oct 18, 1994
- Legacy
- yes
Origin network
AS22773
US
- Name
- Cox Communications Inc.
- Type
- Internet provider
- Registered
- Nov 20, 2001
- Domain
- cox.com
- Website
- www.cox.com/peering
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
204.181.192.0/20
Routing history
- Pattern
- Rotating
- First seen
- Aug 2025
- Current origin since
- Jul 2026 · 3 mo
- Origin networks
- 3
- Last change of origin
- Jul 2026
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 204.
181. 192. 0/ 18 - Netname
- RACKDOG-CGNT-NET-29
- Registrant
- RCN
- Organization
- RCN (C11605224)
- Type
- Reassigned
- Handle
- NET-204-181-192-0-1
- Parent
- NET-204-180-0-0-1
- Created
- May 27, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Oct 18, 1994
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN