Data as of Nov 9, 2026
149.51.56.0/21
Anonymizer · ISP proxyWindstream Communications LLC · 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 149.51.56.0/21 | /24s |
|---|---|---|
| Rackdog | 2,048100% | 8 |
Leased from
Owners leasing their own space
| Name | In 149.51.56.0/21 | /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) | 3,316 946 always on |
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@ |
| └ 149.51.0.0/18 | 16,384 | RACKDOG-CGNT-NET-10 | RCN (C11605108) · 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 149.51.48.0/20
- Prefix
- 149.51.48.0/20
- Announced by
- AS7029 Windstream Communications LLC
- Type
- ISP proxy
- Anonymizer addresses
- 2,304 addresses · 56%
- Leased from
- IP broker Rackdog
- RPKI
- No RPKI
- Netname
- RACKDOG-CGNT-NET-10
- 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
AS7029
US
- Name
- Windstream Communications LLC
- Type
- Internet provider
- Registered
- Jul 30, 1996
- Domain
- uniti.com
- Website
- www.uniti.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
149.51.48.0/20
Routing history
- Pattern
- Rotating
- First seen
- Dec 2023
- Current origin since
- Nov 2025 · 1.0 yr
- Origin networks
- 2
- Last change of origin
- Nov 2025
Recorded history
History
- Handoffs
- 1
IRR
Route objects on 149.51.48.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS398465 not the origin | RADB | V4-PUB-CB-ANNOUNCED | MAINT-AS22773 | Jul 29, 2026 |
Whois
Registration for this announcement
- Range
- 149.
51. 0. 0/ 18 - Netname
- RACKDOG-CGNT-NET-10
- Registrant
- RCN
- Organization
- RCN (C11605108)
- Type
- Reassigned
- Handle
- NET-149-51-0-0-2
- 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