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Data as of Nov 8, 2026

151.186.128.0/24

No anonymizer space · no proxy exits in 30 days

Cisco OpenDNS, LLC · space held by Cisco Systems, Inc.

Announcement
this exact prefix
RPKI valid
Announced by
AS36692
Type
Corporate gateway
Risk
20 / 100 · Low

Operators, sellers and brokers

Corporate gateways

NameParentIn 151.186.128.0/24/24s
Cisco UmbrellaCisco
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.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
151.186.0.0/1665,536OpenDNS-RIPECisco Systems, Inc. (ORG-CSI15-RIPE) · USLEGACYSep 2, 2021rir-abuse@cisco.com
└ 151.186.128.0/24256CIE-MIA2unknownLEGACYOct 29, 2025rir-abuse@cisco.com
via OpenDNS-RIPE
└ 151.186.128.1/321CIE-PECisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 14, 2026rir-abuse@cisco.com
└ 151.186.128.137/321CIE-CACisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYMay 9, 2026rir-abuse@cisco.com
└ 151.186.128.179/321CIE-CRCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYJun 27, 2026rir-abuse@cisco.com
└ 151.186.128.180/321CIE-MXCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYJun 27, 2026rir-abuse@cisco.com
└ 151.186.128.222/321CIE-CLCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYAug 18, 2026rir-abuse@cisco.com
└ 151.186.128.246/321CIE-ARCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 3, 2026rir-abuse@cisco.com
└ 151.186.128.247/321CIE-ARCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 3, 2026rir-abuse@cisco.com
└ 151.186.128.248/321CIE-COCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 3, 2026rir-abuse@cisco.com
└ 151.186.128.249/321CIE-COCisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 3, 2026rir-abuse@cisco.com
└ 151.186.128.250/321CIE-PECisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 3, 2026rir-abuse@cisco.com
└ 151.186.128.251/321CIE-PECisco OpenDNS LLC (ORG-OI31-RIPE) · USLEGACYOct 3, 2026rir-abuse@cisco.com

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

AnnouncementRouting historyRPKI & IRRWhois & abuse
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