Data as of Nov 13, 2026
151.186.34.0/24
No anonymizer space · no proxy exits in 30 daysCisco OpenDNS, LLC · space held by Cisco Systems, Inc.
Announcement
this exact prefix
RPKI valid
Announced by
Type
Corporate gateway
Risk
20 / 100 · Low
Recent change
New origin Aug 2026
its first announcement on record
Operators, sellers and brokers
Corporate gateways
| Name | Parent | In 151.186.34.0/24 | /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@ |
| └ 151.186.34.0/24 | 256 | CIE-AMS2 | unknown | LEGACY | Jun 26, 2026 | rir-abuse@ via OpenDNS-RIPE |
| └ 151.186.34.18/32 | 1 | CIE-PL | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.19/32 | 1 | CIE-FR | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.20/32 | 1 | CIE-IE | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.21/32 | 1 | CIE-BE | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.22/32 | 1 | CIE-DK | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.23/32 | 1 | CIE-LU | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.24/32 | 1 | CIE-BE | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.25/32 | 1 | CIE-DK | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.26/32 | 1 | CIE-FR | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.27/32 | 1 | CIE-IE | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.28/32 | 1 | CIE-LU | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
| └ 151.186.34.29/32 | 1 | CIE-PL | unknown | LEGACY | Nov 9, 2026 | rir-abuse@ via CIE-AMS2 |
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
- Aug 2026
- Current origin since
- Aug 2026 · 3 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 151.
186. 34. 0/ 24 - Netname
- CIE-AMS2
- Registrant country
- NL
- Organization
- Not stated by the registry
- Type
- LEGACY
- Created
- Jun 26, 2026
- Updated
- Jun 26, 2026
- Maintainer
- OPENDNS-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