Block 131.43.0.0

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Range	131.43.0.0 - 131.43.255.255
Prefix	131.43.0.0/16
Size	65,536 addresses
Status	allocated — operator-held
Registry	arin
Country (delegation)	US
Date	19890110
Opaque id	45fe880b68a8f2850ebdcfdc57b4556c
Block UUID	`8b2bdd4f-acd2-5415-924e-daf5a18d7c66`
Probes	2,916
RDAP state	own — the registry object is this block
RDAP service	rdap.arin.net
RDAP fetched	2026-09-10T23:10:02Z
Flags	none

RIR delegation record

registry	arin
country	US
type	ipv4
start	131.43.0.0
value	65,536
date	19890110
status	allocated
extensions	['45fe880b68a8f2850ebdcfdc57b4556c']

RDAP summary

handle	NET-131-43-0-0-2
name	AFCONC-NET3
type	ALLOCATION
parent handle	NET-131-43-0-0-1
start address	131.43.0.0
end address	131.43.255.255
country	—
organization	Air Force Systems Networking
events	{"last changed": "2025-08-18T17:43:24-04:00", "registration": "2025-08-18T17:43:24-04:00"}
entities	1: registrant × 1 (contact details are not published)

Probes in this block

2,916 probes; the first 60 are listed. An asterisk means phase 3 heard something back.

131.43.2.2 131.43.2.3 131.43.2.5 131.43.2.7 131.43.2.11 131.43.2.13 131.43.2.17 131.43.2.19 131.43.2.23 131.43.2.29 131.43.2.31 131.43.2.37 131.43.2.41 131.43.2.43 131.43.2.47 131.43.2.53 131.43.2.59 131.43.2.61 131.43.2.67 131.43.2.71 131.43.2.73 131.43.2.79 131.43.2.83 131.43.2.89 131.43.2.97 131.43.2.101 131.43.2.103 131.43.2.107 131.43.2.109 131.43.2.113 131.43.2.127 131.43.2.131 131.43.2.137 131.43.2.139 131.43.2.149 131.43.2.151 131.43.2.157 131.43.2.163 131.43.2.167 131.43.2.173 131.43.2.179 131.43.2.181 131.43.2.191 131.43.2.193 131.43.2.197 131.43.2.199 131.43.2.211 131.43.2.223 131.43.2.227 131.43.2.229 131.43.2.233 131.43.2.239 131.43.2.241 131.43.2.251 131.43.3.2 131.43.3.3 131.43.3.5 131.43.3.7 131.43.3.11 131.43.3.13

Who operates this: the layers, side by side

Delegation file	allocated, US, 19890110
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.