Data as of Nov 8, 2026
209.55.166.0/23
No anonymizer space · no proxy exits in 30 daysZscaler, Inc.
Operators, sellers and brokers
Corporate gateways
| Name | Parent | In 209.55.166.0/23 | /24s |
|---|---|---|---|
| Zscaler | 512100% | 2 |
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Operator | Holder | RPKI |
|---|---|---|---|---|---|
| 209.55.166.0/24 since Apr 2024 | AS53813 | Corporate gateway | Corporate gatewaysoperated by Zscaler | Zscaler, Inc. | |
| 209.55.167.0/24 since Apr 2024 | AS53813 | Corporate gateway | Corporate gatewaysoperated by Zscaler | Zscaler, Inc. |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 209. | 24,576 | ZSCAL | Zscaler, Inc. (ZSCAL) · US | Direct Allocation | Sep 21, 2021 | poc-abuse@ |
| └ 209.55.166.0/24 | 256 | ZSCALER-TYO5 | Zscaler, Inc. (C10845337) · JP | Reassigned | May 16, 2024 | poc-abuse@ via ZSCAL |
| └ 209.55.167.0/24 | 256 | ZSCALER-TYO5 | Zscaler, Inc. (C10845339) · JP | Reassigned | May 16, 2024 | poc-abuse@ via ZSCAL |
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
Announced by
Covering announcement 209.55.128.0/18
- Prefix
- 209.55.128.0/18
- Announced by
- AS22616 Zscaler, Inc.
- Type
- Corporate gateway
- RPKI
- No RPKI
- Netname
- ZSCAL
- Registrant
- Zscaler, Inc.
- RIR
- ARIN
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
Who has announced 209.55.128.0/18
209.55.128.0/18
Routing history
- Pattern
- Stable
- First seen
- Sep 2021
- Current origin since
- Sep 2021 · 5.1 yr
- Origin networks
- 1
IRR
Route objects on 209.55.128.0/18
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS22616 | RADB | Zscaler SJC4 | MAINT-AS53444 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 209.
55. 128. 0 - 209. 55. 223. 255 - Netname
- ZSCAL
- Registrant
- Zscaler, Inc.
- Organization
- Zscaler, Inc. (ZSCAL)
- Org address
- 4401 Great America Pkwy, Santa Clara, CA, 95054
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-209-55-128-0-1
- Parent
- NET-209-0-0-0-0
- Created
- Sep 21, 2021
- RIR
- ARIN
- Country
- US
- Delegated
- Sep 21, 2021
- Status
- assigned
Report abuse
Abuse contact
- poc-abuse@
zscaler. com - Name
- poc-abuse
- Phone
- +1-408-701-0534
- Handle
- POCAB2-ARIN