Data as of Nov 11, 2026
154.41.83.0/24
Anonymizer · ISP proxyCogent Communications, LLC
Announcement
this exact prefix
RPKI invalid (origin)
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Oct 31, 2026
from AS21859 Zenlayer Inc
IPv4 market
Path
Announced by AS174 since Oct 31, 2026 · 11 days ago
2 · Leased from
not leased
4 · Use
ISP proxy
anonymizer space, operator not named
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
154.41.83.0/24
From the registry to its use
- Feb 5, 1992Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)154.41.0.0/16
- Sep 15, 2006– today
- Jun 12, 2026– Oct 30, 2026
- Jun 17, 2026
- Oct 31, 2026– today
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | RPKI |
|---|---|---|---|---|
| 154.40.0.0/13 since Sep 2006 | AS174 | Internet provider | 18,375 1,328 always on |
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
- 2,094
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Rotating
- First seen
- Jun 2026
- Current origin since
- Oct 31, 2026 · under a month
- Origin networks
- 2
- Last change of origin
- Oct 31, 2026
Recorded history
History
- Handoffs
- 1
- Also announced by
- 21859
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 154.41.83.0/24 | AS21859 | /24 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS21859 not the origin | ARIN | Route Registered for Cogent Communications Customer - Innolink Network Ltd | MNT-COGC | Jun 17, 2026 |
Whois
Registration for this announcement
- Range
- 154.
41. 0. 0/ 16 - Netname
- COGENT-154-41-16
- 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-154-41-0-0-1
- 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