Data as of Nov 15, 2026
128.177.136.0/24
No anonymizer space · no proxy exits in 30 daysZscaler, Inc. · reallocated from Zayo Bandwidth
Operators, sellers and brokers
Corporate gateways
| Name | Parent | In 128.177.136.0/24 | /24s |
|---|---|---|---|
| Zscaler | 256100% | 1 |
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 128.177.0.0/16 since May 2005 | AS6461 | Internet provider | 177 9 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.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 128.177.0.0/16 | 65,536 | ABOVENET-128-177 | Zayo Bandwidth (ZAYOB) · US | Direct Allocation | Jul 28, 1997 | abuse@ |
| └ 128.177.136.0/24 | 256 | ZAYO-IPYX-069051-128-177-136-0-24 | Zscaler, Inc. (ZSCAL) · US | Reallocated | Oct 17, 2014 | poc-abuse@ |
| └ 128.177.136.0/24 | 256 | ZSCALER-WAS1 | Zscaler, Inc. (C05403455) · US | Reassigned | Oct 17, 2014 | poc-abuse@ 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
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
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2014
- Current origin since
- Oct 2014 · 12 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 128.177.136.0/24 | AS22616 | /24 | ARIN | RPKI valid |
| 128.177.0.0/16 | AS6461 | /16 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS22616 | RADB | Zscaler WAS1 | MAINT-AS53444 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 128.
177. 136. 0/ 24 - Netname
- ZSCALER-WAS1
- Registrant
- Zscaler, Inc.
- Organization
- Zscaler, Inc. (C05403455)
- Type
- Reassigned
- Handle
- NET-128-177-136-0-2
- Parent
- NET-128-177-136-0-1
- Created
- Oct 17, 2014
- RIR
- ARIN
- Country
- US
- Delegated
- Jul 28, 1997
- Status
- assigned
Report abuse
Abuse contact
- poc-abuse@
zscaler. com - Name
- poc-abuse
- Phone
- +1-408-701-0534
- Handle
- POCAB2-ARIN