Data as of Nov 6, 2026
149.51.128.0/18
15,872 anonymizer addresses · 97% · Datacenter proxyRackdog, LLC · space held by Cogent Communications, LLC
IPv4 market
Path
4 · Use
Datacenter proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 149.51.128.0/18 | /24s |
|---|---|---|
| Rackdog | 15,87297% | 62 |
Leased from
Owners leasing their own space
| Name | In 149.51.128.0/18 | /24s |
|---|---|---|
| Cogent Communications, LLC | 15,87297% | 62 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
149.51.128.0/18
From the registry to its use
- Jan 28, 1992Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)149.51.0.0/16
- Sep 15, 2006– today
- Jun 13, 2024Route objectRackdogRADB route object for AS6079 RCN, maintainer MAINT-AS398465149.51.136.0/21
- Dec 2, 2025– today
- Dec 10, 2025Route objectRackdogRADB route object for AS398465 Rackdog, LLC, maintainer MAINT-AS398465
- May 27, 2026AssignedRCNReassigned149.51.128.0/18
- todayLeased fromRackdogIP broker
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | RPKI |
|---|---|---|---|---|---|
| 149.50.0.0/15 since Sep 2006 | AS174 | Internet provider | IP broker Rackdog (part) | 3,359 946 always on |
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
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 |
|---|---|---|---|---|---|---|
| 149.51.0.0/16 | 65,536 | COGENT-149-51-16 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Jan 28, 1992 | abuse@ |
| └ 149.51.128.0/18 | 16,384 | RACKDOG-CGNT-NET-11 | RCN (C11605109) · US | Reassigned | May 27, 2026 | abuse@ via COGENT-149-51-16 |
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
16,384 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Datacenter proxyanonymizer | 15,872 | 97% | 62 | |
| Hosting | 512 | 3.1% | 1 |
Network & registry
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 149.
51. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Jan 28, 1992
- Legacy
- yes
Origin network
AS398465
US
- Name
- Rackdog, LLC
- Type
- Hosting
- Registered
- Jun 15, 2020
- Domain
- rackdog.com
- Website
- rackdog.com
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Dec 2025
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS398465 | RADB | MAINT-AS398465 | Dec 10, 2025 |
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 149.51.136.0/21 | AS6079 | RADB | Customer Route | MAINT-AS398465 | Sep 11, 2025 |
Whois
Registration for this announcement
- Range
- 149.
51. 128. 0/ 18 - Netname
- RACKDOG-CGNT-NET-11
- Registrant
- RCN
- Organization
- RCN (C11605109)
- Type
- Reassigned
- Handle
- NET-149-51-128-0-1
- Parent
- NET-149-51-0-0-1
- Created
- May 27, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 28, 1992
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN