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Data as of Nov 7, 2026

128.177.136.0/24

No anonymizer space · no proxy exits in 30 days

Zscaler, Inc. · reallocated from Zayo Bandwidth

Announcement
this exact prefix
RPKI valid
Announced by
AS22616
Type
Corporate gateway
Risk
20 / 100 · Low

Operators, sellers and brokers

Corporate gateways

NameParentIn 128.177.136.0/24/24s
Zscaler
256100%
1

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
128.177.0.0/16
since May 2005
AS6461Internet provider173
7 always on
Zayo Bandwidth

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
128.177.0.0/1665,536ABOVENET-128-177Zayo Bandwidth (ZAYOB) · USDirect AllocationJul 28, 1997abuse@zayo.com
└ 128.177.136.0/24256ZAYO-IPYX-069051-128-177-136-0-24Zscaler, Inc. (ZSCAL) · USReallocatedOct 17, 2014poc-abuse@zscaler.com
└ 128.177.136.0/24256ZSCALER-WAS1Zscaler, Inc. (C05403455) · USReassignedOct 17, 2014poc-abuse@zscaler.com
via ZAYO-IPYX-069051-128-177-136-0-24

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
Zayo Bandwidth
Handle
ZAYOB
Range
128.177.0.0/16
Registration type
Direct Allocation
Record created
Jul 28, 1997
Legacy
yes
Reallocated to
Zscaler, Inc. (ZSCAL)
Reallocated range
128.177.136.0/24
Reallocated
Oct 17, 2014
Origin network

AS22616

US
Name
Zscaler, Inc.
Type
Business
Registered
May 28, 2014
Domain
zscaler.com
Website
www.zscaler.com
Industry
Service
Spamhaus ASN-DROP
not listed