Data as of Nov 6, 2026
149.51.136.0/21
Anonymizer · 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 149.51.136.0/21 | /24s |
|---|---|---|
| Rackdog | 2,048100% | 8 |
Leased from
Owners leasing their own space
| Name | In 149.51.136.0/21 | /24s |
|---|---|---|
| Cogent Communications, LLC | 2,048100% | 8 |
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
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 149.51.136.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.137.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.138.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.139.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.140.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.141.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.142.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 149.51.143.0/24 since Dec 2025 | AS154395 | Datacenter proxy | IP broker Rackdog | Cogent Communications, LLC |
Registrations in this block
The registry's network records over this block, widest first, each 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.
Network & registry
Announced by
Covering announcement 149.51.128.0/18
- Prefix
- 149.51.128.0/18
- Announced by
- AS398465 Rackdog, LLC
- Type
- Hosting
- Anonymizer addresses
- none
- Leased from
- IP broker Rackdog
- RPKI
- No RPKI
- Netname
- RACKDOG-CGNT-NET-11
- Registrant
- RCN
- RIR
- ARIN
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
149.51.128.0/18
Routing history
- Pattern
- Stable
- First seen
- Dec 2025
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
IRR
Route objects on 149.51.128.0/18
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS398465 | RADB | MAINT-AS398465 | Dec 10, 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