Data as of Nov 8, 2026
144.223.0.0/16
8,192 anonymizer addresses · 13% · ISP proxyCogent Communications, LLC
IPv4 market
Path
4 · Use
Internet provider
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 144.223.0.0/16 | /24s |
|---|---|---|
| Rackdog | 8,19213% | 32 |
Leased from
Owners leasing their own space
| Name | In 144.223.0.0/16 | /24s |
|---|---|---|
| Cogent Communications, LLC | 8,19213% | 32 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
144.223.0.0/16
From the registry to its use
- Jan 11, 1991Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)144.223.0.0/16
- May 9, 2005– May 16, 2024AnnouncedAS1239 Cogent Communications, LLC
- Feb 1, 2010Route objectAS10026 Telstra Global Internet Services Network BlocksRADB route object for AS10026 Telstra Global Internet Services Network Blocks, maintainer MAINT-AS4637144.223.44.0/22
- Mar 23, 2022Route objectAS1239 Cogent Communications, LLCARIN route object for AS1239 Cogent Communications, LLC, maintainer MNT-COGC
- Jun 6, 2023Route objectAS174 Cogent Communications, LLCARIN route object for AS174 Cogent Communications, LLC, maintainer MNT-COGC
- May 5, 2024– today
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 144.223.96.0/19 since Dec 2025 | AS4637 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 144.223.0.0/16 | 65,536 | COGENT-144-223-0 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Jan 11, 1991 | abuse@ |
| └ 144.223.96.0/19 | 8,192 | RACKDOG-CGNT-NET-1 | RCN (C11605020) · US | Reassigned | May 27, 2026 | abuse@ via COGENT-144-223-0 |
| └ 144.223.180.6/32 | 1 | SPRINTLINK | unknown | — | — | — |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
65,536 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Internet provider | 57,343 | 87% | 3 | |
| ISP proxyanonymizer | 8,192 | 13% | 1 | |
| Business | 1 | <0.01% | 1 |
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
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- May 2005
- Current origin since
- May 2024 · 2.5 yr
- Origin networks
- 2
- Last change of origin
- May 2024
Recorded history
History
- Handoffs
- 1
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 144.223.44.0/22 | AS10026 | RADB | PACNET (proxy-registered route object) | MAINT-AS4637 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 144.
223. 0. 0/ 16 - Netname
- COGENT-144-223-0
- 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-144-223-0-0-1
- Parent
- NET-144-0-0-0-0
- Created
- Jan 11, 1991
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 11, 1991
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN