Data as of Nov 4, 2026
204.4.128.0/18
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC
Announcements
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 204.4.130.0/24 since May 2005 | AS9084 | Business | Cogent Communications, LLC | |
| 204.4.131.0/24 since May 2005 | AS9084 | Business | Cogent Communications, LLC | |
| 204.4.142.0/24 since Jul 2005 | AS9084 | Business | Cogent Communications, LLC | |
| 204.4.143.0/24 since Jul 2005 | AS9084 | Business | Cogent Communications, LLC | |
| 204.4.170.0/24 since Feb 2018 | AS9084 | Business | Cogent Communications, LLC | |
| 204.4.175.0/24 since Feb 2018 | AS9084 | Business | Cogent Communications, LLC | |
| 204.4.178.0/24 since Sep 2016 | AS33598 | Business | Cogent Communications, LLC | |
| 204.4.182.0/24 since Sep 2016 | AS33598 | Business | Cogent Communications, LLC | |
| 204.4.185.0/24 since Sep 2016 | AS33598 | Business | Cogent Communications, LLC | |
| 204.4.187.0/24 since May 2005 | AS6195 | Business | 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 |
|---|---|---|---|---|---|---|
| 204.4.0.0/14 | 262,144 | COGENT-204-4-14 | Cogent Communications, LLC (COGC) · US | Direct Allocation | May 5, 1994 | [email protected] |
| └ 204.4.128.0/18 | 16,384 | GSCO-NETBLK-3 | The Goldman Sachs Group, Inc. (GOLDM) · US | Reassigned | Apr 14, 1995 | — |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
16,384 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Internet provider | 13,824 | 84% | 9 | |
| Business | 2,560 | 16% | 10 |
Network & registry
Announced by
Covering announcement 204.4.0.0/14
- Prefix
- 204.4.0.0/14
- Announced by
- AS174 Cogent Communications, LLC
- Type
- Internet provider
- Proxy exits
- 2
- RPKI
- No RPKI
- Netname
- COGENT-204-4-14
- 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 204.4.0.0/14
204.4.0.0/14
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on 204.4.0.0/14
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS174 | RADB | Cogent | MAINT-AS174 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 204.4.0.0/14
- Netname
- COGENT-204-4-14
- 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-204-4-0-0-1
- Parent
- NET-204-0-0-0-0
- Created
- May 5, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- May 5, 1994
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN