Data as of Nov 4, 2026
121.91.239.0/24
Anonymizer · Datacenter proxyRackdog, LLC
Announcement
this exact prefix
RPKI valid
Announced by
Type
Datacenter proxy
Risk
85 / 100 · Critical
IPv4 market
Path
2 · Leased from
4 · Use
Datacenter proxy
anonymizer space, operator not named
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
121.91.239.0/24
From the registry to its use
- Dec 21, 2020Registry recordRackdog, LLCDirect Allocation121.91.208.0 - 121.91.255.255
- Sep 18, 2023ReallocatedCable & FiberlinkReallocated121.91.224.0/19
- Sep 9, 2025– today
- Nov 16, 2025Route objectRackdogRADB route object for AS6079 RCN, maintainer MAINT-AS398465
- todayLeased fromRackdogIP broker
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 |
|---|---|---|---|---|---|---|
| 121.91.208.0 - 121.91.255.255 | 12,288 | NET-121-91-208-0 | Rackdog, LLC (RL-859) · US | Direct Allocation | Dec 21, 2020 | [email protected] |
| └ 121.91.224.0/19 | 8,192 | RACKDOG | Cable & Fiberlink (MIL-167) · US | Reallocated | Sep 18, 2023 | [email protected] |
Network & registry
IPv4 market
Holder
- Organization
- Rackdog, LLC
- Handle
- RL-859
- Range
- 121.91.208.0 - 121.91.255.255
- Registration type
- Direct Allocation
- Record created
- Dec 21, 2020
- Reallocated to
- Cable & Fiberlink (MIL-167)
- Reallocated range
- 121.91.224.0/19
- Reallocated
- Sep 18, 2023
Origin network
AS398465
US
- Name
- Rackdog, LLC
- Type
- Hosting
- Registered
- Jun 15, 2020
- Domain
- rackdog.com
- Website
- rackdog.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2025
- Current origin since
- Sep 2025 · 1.2 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 121.91.224.0/19 | AS701 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS4637 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS6079 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS7018 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS7029 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS7922 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS9304 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS11404 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS42689 | /24 | ARIN | Another network |
| 121.91.224.0/19 | AS398465 | /24 | ARIN | RPKI valid |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6079 not the origin | RADB | MAINT-AS398465 | Nov 16, 2025 |
Whois
Registration for this announcement
- Range
- 121.91.224.0/19
- Netname
- RACKDOG
- Registrant
- Cable & Fiberlink
- Organization
- Cable & Fiberlink (MIL-167)
- Org address
- 425 HUEHL RD BLDG 4B, Northbrook, IL, 60062
- Org country
- US
- Type
- Reallocated
- Handle
- NET-121-91-224-0-1
- Parent
- NET-121-91-208-0-1
- Created
- Sep 18, 2023
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 21, 2020
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- CABLE AND FIBERLINK
- Phone
- +1-224-803-4912
- Handle
- CABLE66-ARIN