Data as of Nov 13, 2026
38.107.151.0/24
No anonymizer space · no proxy exits in 30 daysSierra Experts · space held by Cogent Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 38.0.0.0/8 | AS174 | Internet provider | IP broker Rackdog (part) | 398,658 73,038 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@ |
| └ 38.107.151.0/24 | 256 | NET-38-107-151-0-1 | Sierra Experts (SIERR-38) · US | Reassigned | Oct 26, 2017 | — |
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
AS33345
US
- Name
- Sierra Experts
- Type
- Internet provider
- Registered
- Mar 2, 2009
- Domain
- sierraexperts.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
- Stable
- First seen
- Jul 2010
- Current origin since
- Jul 2010 · 16 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS33345 | ALTDB | Proxy registration to prevent harm from ARIN-NONAUTH shutdown | MAINT-AS7034 | Apr 4, 2022 |
Whois
Registration for this announcement
- Range
- 38.
107. 151. 0/ 24 - Netname
- NET-38-107-151-0-1
- Registrant
- Sierra Experts
- Organization
- Sierra Experts (SIERR-38)
- Org address
- 2 Robinson Plaza, Pittsburgh, PA, 15205
- Org country
- US
- Type
- Reassigned
- Handle
- NET-38-107-151-0-1
- Parent
- NET-38-0-0-0-1
- Created
- Oct 26, 2017
- 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