Data as of Nov 3, 2026
154.57.28.0/22
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC
Announcement
this exact prefix
No RPKI
Announced by
Type
Internet provider
Recent change
New origin Jul 2026
from AS206735 Novelcomm LP, after 2.2 years unannounced
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | RPKI |
|---|---|---|---|---|
| 154.48.0.0/12 since May 2005 | AS174 | Internet provider | 12,738 2,387 always on |
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 154.57.28.0/24 since Jul 2026 | AS174 | Internet provider | Cogent Communications, LLC | |
| 154.57.29.0/24 since Oct 10, 2026 | AS174 | Internet provider | Cogent Communications, LLC | |
| 154.57.30.0/24 since Jul 2026 | AS174 | Internet provider | Cogent Communications, LLC | |
| 154.57.31.0/24 since Jul 2026 | AS174 | Internet provider | Cogent Communications, LLC |
Network & registry
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
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Mar 2024
- Current origin since
- Jul 2026 · 3 mo
- Origin networks
- 2
- Last change of origin
- Jul 2026
Recorded history
History
- Handoffs
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS206735 not the origin | RADB | Registered for Cogent Communications Customer - Novelcomm | MAINT-AS174 | Aug 5, 2024 |
Whois
Registration for this announcement
- Range
- 154.57.0.0/16
- Netname
- COGENT-154-57-16
- 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-154-57-0-0-1
- 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
- [email protected]
- Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN