Data as of Nov 15, 2026
151.186.129.0/24
No anonymizer space · no proxy exits in 30 daysCisco OpenDNS, LLC · space held by Cisco Systems, Inc.
Operators, sellers and brokers
Corporate gateways
| Name | Parent | In 151.186.129.0/24 | /24s |
|---|---|---|---|
| Cisco Umbrella | Cisco | 256100% | 1 |
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 |
|---|---|---|---|---|---|---|
| 151.186.0.0/16 | 65,536 | OpenDNS-RIPE | Cisco Systems, Inc. (ORG-CSI15-RIPE) · US | LEGACY | Sep 2, 2021 | rir-abuse@ |
| └ 151.186.129.0/24 | 256 | CIE-IAD1 | unknown | LEGACY | Oct 29, 2025 | rir-abuse@ via OpenDNS-RIPE |
| └ 151.186.129.2/32 | 1 | CIE-CO | unknown | LEGACY | Oct 3, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.3/32 | 1 | CIE-PE | unknown | LEGACY | Oct 3, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.39/32 | 1 | CIE-AR | unknown | LEGACY | Oct 3, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.40/32 | 1 | CIE-PE | unknown | LEGACY | Oct 3, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.42/32 | 1 | CIE-AR | unknown | LEGACY | Oct 3, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.45/32 | 1 | CIE-CO | unknown | LEGACY | Oct 3, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.61/32 | 1 | CIE-PE | unknown | LEGACY | Oct 14, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.160/32 | 1 | CIE-CA | unknown | LEGACY | May 13, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.202/32 | 1 | CIE-CR | unknown | LEGACY | Jun 27, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.203/32 | 1 | CIE-MX | unknown | LEGACY | Jun 27, 2026 | rir-abuse@ via CIE-IAD1 |
| └ 151.186.129.245/32 | 1 | CIE-CL | unknown | LEGACY | Aug 18, 2026 | rir-abuse@ via CIE-IAD1 |
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
Registry
Holder
- Organization
- Cisco Systems, Inc.
- Handle
- ORG-CSI15-RIPE
- Range
- 151.
186. 0. 0/ 16 - Registration type
- LEGACY
- Record created
- Sep 2, 2021
- Legacy
- yes
Origin network
AS36692
US
- Name
- Cisco OpenDNS, LLC
- Type
- Business
- Registered
- Mar 21, 2006
- Domain
- opendns.com
- Website
- www.opendns.com/
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2024
- Current origin since
- Oct 2024 · 2.1 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 151.186.129.0/24 | AS36692 | /24 | RIPE | RPKI valid |
Whois
Registration for this announcement
- Range
- 151.
186. 129. 0/ 24 - Netname
- CIE-IAD1
- Registrant country
- US
- Organization
- Not stated by the registry
- Type
- LEGACY
- Created
- Oct 29, 2025
- Updated
- Nov 4, 2026
- Maintainer
- lir-us-cisco2-1-MNT
- RIR
- RIPE NCC
- Country
- US
- Delegated
- Sep 17, 1991
- Status
- assigned
Report abuse
Abuse contact
- rir-abuse@
cisco. com - Name
- Abuse-C Role
- Handle
- AR80285-RIPE