Data as of Nov 15, 2026
198.135.4.0/22
No anonymizer space · no proxy exits in 30 daysCisco Systems, Inc.
Network & registry
Announced by
Covering announcement 198.135.0.0/21
- Prefix
- 198.135.0.0/21
- Announced by
- AS109 Cisco Systems, Inc.
- Type
- Business
- RPKI
- RPKI valid
- Netname
- NETBLK-CISCO-CBLOCK
- Registrant
- Cisco Systems, Inc.
- RIR
- ARIN
Origin network
AS109
US
- Name
- Cisco Systems, Inc.
- Type
- Business
- Registered
- May 6, 1987
- Domain
- cisco.com
- Website
- www.cisco.com
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 198.135.0.0/21
198.135.0.0/21
Routing history
- Pattern
- Stable
- First seen
- Dec 2005
- Current origin since
- Dec 2005 · 21 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 198.135.0.0/21 | AS109 | /24 | ARIN | RPKI valid |
| 198.135.0.0/21 | AS198949 | /24 | ARIN | Another network |
IRR
Route objects on 198.135.0.0/21
Whois
Registration for this announcement
- Range
- 198.
135. 0. 0/ 21 - Netname
- NETBLK-CISCO-CBLOCK
- Registrant
- Cisco Systems, Inc.
- Organization
- Cisco Systems, Inc. (CS-2831)
- Org address
- 251 LITTLE FALLS DRIVE, WILMINGTON, DE, 19808
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-198-135-0-0-1
- Parent
- NET-198-0-0-0-0
- Created
- Apr 8, 1993
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 8, 1993
- Status
- assigned
Report abuse
Abuse contact
- csirt-notify@
cisco. com - Name
- Cisco CSIRT
- Phone
- +1-408-527-3227
- Handle
- CISCO6-ARIN