Block 137.83.128.0

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Range	137.83.128.0 - 137.83.191.255
Prefix	137.83.128.0/18
Size	16,384 addresses
Status	allocated — operator-held
Registry	arin
Country (delegation)	US
Date	20190130
Opaque id	2e8affbc9d91e0f226f52ef155022598
Block UUID	`7b6e37ec-88b9-578b-9075-14255095e592`
Probes	648
RDAP state	own — the registry object is this block
RDAP service	rdap.arin.net
RDAP fetched	2026-09-10T23:10:31Z
Flags	none

RIR delegation record

registry	arin
country	US
type	ipv4
start	137.83.128.0
value	16,384
date	20190130
status	allocated
extensions	['2e8affbc9d91e0f226f52ef155022598']

RDAP summary

handle	NET-137-83-128-0-2
name	ZSCALER-MAD3
type	ASSIGNMENT
parent handle	NET-137-83-128-0-1
start address	137.83.128.0
end address	137.83.128.255
country	—
organization	Zscaler, Inc.
events	{"last changed": "2019-07-19T16:54:52-04:00", "registration": "2019-07-19T16:54:52-04:00"}
entities	1: registrant × 1 (contact details are not published)

Probes in this block

648 probes; the first 60 are listed. An asterisk means phase 3 heard something back.

137.83.131.2 137.83.131.3 137.83.131.5 137.83.131.7 137.83.131.11 137.83.131.13 137.83.131.17 137.83.131.19 137.83.131.23 137.83.131.29 137.83.131.31 137.83.131.37 137.83.131.41 137.83.131.43 137.83.131.47 137.83.131.53 137.83.131.59 137.83.131.61 137.83.131.67 137.83.131.71 137.83.131.73 137.83.131.79 137.83.131.83 137.83.131.89 137.83.131.97 137.83.131.101 137.83.131.103 137.83.131.107 137.83.131.109 137.83.131.113 137.83.131.127 137.83.131.131 137.83.131.137 137.83.131.139 137.83.131.149 137.83.131.151 137.83.131.157 137.83.131.163 137.83.131.167 137.83.131.173 137.83.131.179 137.83.131.181 137.83.131.191 137.83.131.193 137.83.131.197 137.83.131.199 137.83.131.211 137.83.131.223 137.83.131.227 137.83.131.229 137.83.131.233 137.83.131.239 137.83.131.241 137.83.131.251 137.83.137.2 137.83.137.3 137.83.137.5 137.83.137.7 137.83.137.11 137.83.137.13

Who operates this: the layers, side by side

Delegation file	allocated, US, 20190130
Registry object	own — the registry object is this block
Routing	not recorded
Authorization	not recorded
DNS pointing here	not recorded
Certificate	none presented

The registry's verbatim RDAP answer is kept in the local work product dataflow.out/02_ip_block.json and is not published, because it carries registrant contact details.