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Data as of Nov 11, 2026

151.186.136.0/24

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 151.186.136.0/24/24s
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
└ 151.186.136.0/24256CIE-BOM1unknownLEGACYOct 29, 2025rir-abuse@cisco.com
via OpenDNS-RIPE
└ 151.186.136.96/321CIE-SAunknownLEGACYNov 9, 2026rir-abuse@cisco.com
via CIE-BOM1
└ 151.186.136.128/321CIE-AEunknownLEGACYNov 9, 2026rir-abuse@cisco.com
via CIE-BOM1
└ 151.186.136.129/321CIE-AEunknownLEGACYNov 9, 2026rir-abuse@cisco.com
via CIE-BOM1
└ 151.186.136.143/321CIE-OMunknownLEGACYNov 9, 2026rir-abuse@cisco.com
via CIE-BOM1
└ 151.186.136.144/321CIE-OMunknownLEGACYNov 9, 2026rir-abuse@cisco.com
via CIE-BOM1

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
Routing timeline

Who has announced this prefix

Summary

Routing history

Pattern
Stable
First seen
Oct 2025
Current origin since
Oct 2025 · 1.1 yr
Origin networks
1