Data as of Nov 10, 2026
192.137.21.0/24
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC · space held by HP Inc.
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 |
|---|---|---|---|---|---|---|
| 192.137.21.0/24 | 256 | HP | HP Inc. (HPINC-Z) · US | Direct Allocation | May 20, 1992 | IPAdmin@ |
| └ 192.137.21.0/24 | 256 | SEMI | Semiconductor Equipment and Material (SEM) · US | Reassigned | May 27, 1994 | — |
Network & registry
Registry
Holder
- Organization
- HP Inc.
- Handle
- HPINC-Z
- Range
- 192.
137. 21. 0/ 24 - Registration type
- Direct Allocation
- Record created
- May 20, 1992
- Legacy
- yes
Origin network
AS7018
US
- Name
- AT&T Enterprises, LLC
- Type
- Internet provider
- Registered
- Jul 30, 1996
- Domain
- att.com
- Website
- www.att.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Dec 2016 · 9.9 yr
- Origin networks
- 5
- Last change of origin
- Dec 2016
Recorded history
History
- Handoffs
- 5
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS7029 not the origin | RADB | Windstream (PaeTec) | MAINT-AS7029 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 192.
137. 21. 0/ 24 - Netname
- SEMI
- Registrant
- Semiconductor Equipment and Material
- Organization
- Semiconductor Equipment and Material (SEM)
- Org address
- 673 S Milpitas Boulevard, Milpitas, CA, 95035
- Org country
- US
- Type
- Reassigned
- Handle
- NET-192-137-21-0-2
- Parent
- NET-192-137-21-0-1
- Created
- May 27, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- May 20, 1992
- Status
- assigned
Report abuse
Abuse contact
- nobody@
example. com - Name
- No, Contact Known
- Phone
- +1-800-555-1234
- Handle
- CKN23-ARIN