Data as of Nov 13, 2026
38.4.136.0/21
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC
IPv4 market
Path
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 |
|---|---|---|---|---|
| 38.4.136.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.137.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.138.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.139.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.140.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.141.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.142.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC | |
| 38.4.143.0/24 since Sep 2026 | AS268624 | Business | Cogent Communications, LLC |
Network & registry
Announced by
Covering announcement 38.0.0.0/8
- Prefix
- 38.0.0.0/8
- Announced by
- AS174 Cogent Communications, LLC
- Type
- Internet provider
- Leased from
- IP broker Rackdog (part)
- Proxy exits
- 399,231
- Always-on exits
- 72,630
- RPKI
- No RPKI
- Netname
- COGENT-A
- 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
- 2,094
Routing timeline
Who has announced 38.0.0.0/8
38.0.0.0/8
Routing history
- First seen
- Before our records
- Origin networks
- 1
IRR
Route objects on 38.0.0.0/8
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS174 | RADB | Cogent | MAINT-AS174 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 38.
0. 0. 0/ 8 - Netname
- COGENT-A
- 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-38-0-0-0-1
- Created
- Apr 16, 1991
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 16, 1991
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN