Data as of Nov 14, 2026
38.237.72.0/24
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 →
38.237.72.0/24
From the registry to its use
- Apr 16, 1991Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)38.0.0.0/8
- Dec 2, 2025– today
- Dec 2, 2025– today
- Dec 8, 2025Route objectRackdogRADB route object for AS154395 Rackdog LLC, maintainer MAINT-AS398465
- May 27, 2026AssignedRCNReassigned38.237.0.0/16
- todayLeased fromRackdogIP broker
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 38.237.0.0/16 since Dec 2025 | AS398465 | Hosting | IP broker Rackdog | Cogent Communications, LLC | ||
| 38.0.0.0/8 | AS174 | Internet provider | IP broker Rackdog (part) | 397,758 74,175 always on | 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 |
|---|---|---|---|---|---|---|
| 38.0.0.0/8 | 16,777,216 | COGENT-A | Cogent Communications, LLC (COGC) · US | Direct Allocation | Apr 16, 1991 | abuse@ |
| └ 38.237.0.0/16 | 65,536 | RACKDOG-CGNT-NET-116 | RCN (C11605362) · US | Reassigned | May 27, 2026 | abuse@ via COGENT-A |
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
- 38.
0. 0. 0/ 8 - Registration type
- Direct Allocation
- Record created
- Apr 16, 1991
- Legacy
- yes
Origin network
AS154395
US
- Name
- Rackdog LLC
- Type
- Hosting
- Registered
- Dec 2, 2025
- Domain
- 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
- Dec 2025
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS154395 | RADB | MAINT-AS398465 | Dec 8, 2025 |
Whois
Registration for this announcement
- Range
- 38.
237. 0. 0/ 16 - Netname
- RACKDOG-CGNT-NET-116
- Registrant
- RCN
- Organization
- RCN (C11605362)
- Type
- Reassigned
- Handle
- NET-38-237-0-0-1
- Parent
- NET-38-0-0-0-1
- Created
- May 27, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 16, 1991
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN