Data as of Nov 6, 2026
154.21.100.0/22
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 154.21.100.0/24 since Nov 4, 2026 | AS211057 | Residential | Cogent Communications, LLC | |
| 154.21.101.0/24 since Nov 4, 2026 | AS211057 | Residential | Cogent Communications, LLC | |
| 154.21.102.0/24 since Nov 4, 2026 | AS211057 | Residential | Cogent Communications, LLC | |
| 154.21.103.0/24 since Nov 4, 2026 | AS211057 | Residential | Cogent Communications, LLC |
Network & registry
Announced by
Covering announcement 154.21.0.0/16
- Prefix
- 154.21.0.0/16
- Announced by
- AS174 Cogent Communications, LLC
- Type
- Internet provider
- Proxy exits
- 283
- Always-on exits
- 44
- RPKI
- No RPKI
- Netname
- COGENT-154-21-16
- 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 154.21.0.0/16
154.21.0.0/16
Routing history
- Pattern
- Stable
- First seen
- Sep 2018
- Current origin since
- Sep 2018 · 8.2 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 154.
21. 0. 0/ 16 - Netname
- COGENT-154-21-16
- 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-154-21-0-0-1
- Parent
- NET-154-0-0-0-0
- Created
- Feb 5, 1992
- RIR
- ARIN
- Country
- US
- Delegated
- Feb 5, 1992
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN