Data as of Nov 4, 2026
205.161.64.0/20
Anonymizer · ISP proxyRCN · space held by Cogent Communications, LLC
IPv4 market
Path
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 205.161.64.0/20 | /24s |
|---|---|---|
| Rackdog | 4,096100% | 16 |
Leased from
Owners leasing their own space
| Name | In 205.161.64.0/20 | /24s |
|---|---|---|
| Cogent Communications, LLC | 4,096100% | 16 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
205.161.64.0/20
From the registry to its use
- Mar 8, 1995Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)205.160.0.0/14
- Dec 4, 2020– Jan 8, 2021
- Jul 14, 2023Route objectRackdogRADB route object for AS980 Northern Cable and Fiber, LLC, maintainer MAINT-AS398465
- Jul 14, 2023Route objectRackdogRADB route object for AS398465 Rackdog, LLC, maintainer MAINT-AS398465
- Aug 3, 2023– Dec 12, 2023AnnouncedAS980 Northern Cable and Fiber, LLC
- Jan 18, 2024– Feb 10, 2024
- Jan 18, 2024– Jul 15, 2024
- May 5, 2024– May 16, 2024
- Jun 13, 2024Route objectRackdogRADB route object for AS6079 RCN, maintainer MAINT-AS398465
- Jul 4, 2024– today
- Sep 14, 2024– Sep 25, 2024
- Nov 13, 2024– today
- May 27, 2026AssignedRCNReassigned205.161.64.0/19
- todayLeased fromRackdogIP broker
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 205.161.64.0/19 since Nov 2024 | AS174 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC | ||
| 205.160.0.0/14 since May 2024 | AS174 | Internet provider | 20 2 always on | Cogent Communications, LLC |
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 205.161.64.0/21 since Aug 2024 | AS11404 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC | |
| 205.161.72.0/21 since Oct 2024 | AS11404 | ISP proxy | IP broker Rackdog | Cogent Communications, LLC |
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 |
|---|---|---|---|---|---|---|
| 205.160.0.0/14 | 262,144 | COGENT-205-160-0 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Mar 8, 1995 | [email protected] |
| └ 205.161.64.0/19 | 8,192 | RACKDOG-CGNT-NET-36 | RCN (C11605231) · US | Reassigned | May 27, 2026 | [email protected] via COGENT-205-160-0 |
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
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 205.160.0.0/14
- Registration type
- Direct Allocation
- Record created
- Mar 8, 1995
- Legacy
- yes
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
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Rotating
- First seen
- Aug 2023
- Current origin since
- Jul 2024 · 2.3 yr
- Origin networks
- 4
- Last change of origin
- Jul 2024
Recorded history
History
- Handoffs
- 3
Whois
Registration for this announcement
- Range
- 205.161.64.0/19
- Netname
- RACKDOG-CGNT-NET-36
- Registrant
- RCN
- Organization
- RCN (C11605231)
- Type
- Reassigned
- Handle
- NET-205-161-64-0-1
- Parent
- NET-205-160-0-0-1
- Created
- May 27, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 8, 1995
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN