Data as of Nov 4, 2026

100.42.0.0/20

No anonymizer space · no proxy exits in 30 days

IsoTropic Networks, Inc.

Announcement

this exact prefix

No RPKI

Announced by

Type

Internet provider

Risk

0 / 100 · Low

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
100.42.0.0/20	4,096	ISOTROPIC-NETWORKS	IsoTropic Networks, Inc. (ISOTR-1) · US	Direct Allocation	Nov 16, 2011	[email protected]
└ 100.42.0.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.1.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.2.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.3.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.4.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.5.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.6.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.7.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.8.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.9.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.10.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.11.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.12.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.13.0/24	256	ISOTROPIC	unknown	—	—	—
└ 100.42.14.0/24	256	ISOTROPIC-NETWORKS	unknown	—	—	—
└ 100.42.15.0/24	256	ORION	unknown	—	—	—

Origin network

IRR

Origin	Registry	Description	Maintainer	Modified
AS36426	RADB	RR-RC-IsoTropic Networks, Inc.-Milwaukee	MAINT-RR	Nov 13, 2023

IRR inside

Prefix	Origin	Registry	Description	Maintainer	Modified
100.42.0.0/21	AS36426	RADB	RR-RC-IsoTropic Networks, Inc.-Milwaukee	MAINT-RR	Nov 13, 2023
100.42.8.0/21	AS36426	RADB	RR-RC-IsoTropic Networks, Inc.-Milwaukee	MAINT-RR	Nov 13, 2023