Data as of Nov 3, 2026
121.91.216.0/21
Anonymizer · ISP proxyRCN · space held by Rackdog, LLC
IPv4 market
Path
2 · Leased from
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 121.91.216.0/21 | /24s |
|---|---|---|
| Rackdog | 2,048100% | 8 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
121.91.216.0/21
From the registry to its use
- Dec 21, 2020Registry recordRackdog, LLCDirect Allocation121.91.208.0 - 121.91.255.255
- Jan 14, 2022ReallocatedCable & FiberlinkReallocated121.91.208.0/20
- Nov 7, 2023– Jan 29, 2024
- Jan 18, 2024– Jul 15, 2024
- Jun 13, 2024Route objectRackdogRADB route object for AS6079 RCN, maintainer MAINT-AS398465
- Jul 4, 2024– Nov 2, 2026
- Sep 26, 2024– Nov 24, 2024
- 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] |
| └ 121.91.208.0/20 | 4,096 | RACKDOG | Cable & Fiberlink (MIL-167) · US | Reallocated | Jan 14, 2022 | [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
- 121.91.208.0/20
- Reallocated
- Jan 14, 2022
Origin network
AS6079
US
- Name
- RCN
- Type
- Internet provider
- Registered
- Apr 4, 2001
- Domain
- astound.com
- Website
- www.astound.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Nov 2023
- Current origin since
- Jul 2024 · 2.3 yr
- Origin networks
- 4
- Last change of origin
- Jul 2024
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 121.91.208.0/20 | AS701 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS4637 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS6079 | /24 | ARIN | RPKI valid |
| 121.91.208.0/20 | AS7018 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS7029 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS7922 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS11404 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS42689 | /24 | ARIN | Another network |
| 121.91.208.0/20 | AS398465 | /24 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6079 | RADB | Customer Route | MAINT-AS398465 | Sep 11, 2025 |
Whois
Registration for this announcement
- Range
- 121.91.208.0/20
- 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-121-91-208-0-2
- Parent
- NET-121-91-208-0-1
- Created
- Jan 14, 2022
- 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