Data as of Nov 4, 2026
149.51.8.0/23
No anonymizer space · no proxy exits in 30 daysRackdog, LLC · space held by Cogent Communications, LLC
IPv4 market
Path
2 · Leased from
4 · Use
Hosting
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
149.51.8.0/23
From the registry to its use
- Jan 28, 1992Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)149.51.0.0/16
- May 28, 2022– Aug 7, 2022
- Jan 24, 2025– today
- Sep 21, 2025– today
- May 27, 2026AssignedRCNReassigned149.51.0.0/18
- todayLeased fromRackdogIP broker
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 149.51.8.0/21 since Jan 2025 | AS398465 | Hosting | IP broker Rackdog | Cogent Communications, LLC | ||
| 149.50.0.0/15 since Sep 2006 | AS174 | Internet provider | IP broker Rackdog (part) | 3,378 977 always on |
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 |
|---|---|---|---|---|---|---|
| 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
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
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2025
- Current origin since
- Sep 2025 · 1.1 yr
- Origin networks
- 1
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