Data as of Nov 8, 2026
38.145.100.0/23
256 anonymizer addresses · 50% · ISP proxyCogent Communications, LLC
IPv4 market
Path
2 · Leased from
4 · Use
Internet provider
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 38.145.100.0/23 | /24s |
|---|---|---|
| Rackdog | 25650% | 1 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
38.145.100.0/23
From the registry to its use
- Apr 16, 1991Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)38.0.0.0/8
- Jan 31, 2026– Apr 12, 2026
- Apr 1, 2026– today
- Sep 18, 2026– today
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Anonymizer addresses | Operator | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|---|---|
| 38.0.0.0/8 | AS174 | Internet provider | 62,7260.37%ISP proxy, Datacenter proxy, VPN | Proxy providerssold by Oxylabs, QuarkIP, HypeProxy, Novada, MyPrivateProxyVPN servicesoperated by Windscribe, VPN Gate | IP broker Rackdog (part) | 403,985 78,265 always on | Cogent Communications, LLC |
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 38.145.100.0/24 since Apr 2026 | AS174 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 38.145.101.0/24 since Apr 2026 | AS174 | Internet provider | Cogent Communications, LLC |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
512 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Internet provider | 256 | 50% | 1 | |
| ISP proxyanonymizer | 256 | 50% | 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
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Rotating
- First seen
- Jan 2026
- Current origin since
- Apr 2026 · 7 mo
- Origin networks
- 2
- Last change of origin
- Apr 2026
Recorded history
History
- Handoffs
- 1
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