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Data as of Nov 6, 2026

76.239.148.0/22

No anonymizer space · no proxy exits in 30 days

IsoTropic Networks, Inc. · space held by AT&T Enterprises, LLC

Announcement
76.239.144.0/21
RPKI valid
Announced by
AS36426
Type
Internet provider
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
76.239.0.0/16
since Dec 2017
AS7018Residential52
4 always on
AT&T Enterprises, LLC

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
76.238.64.0 - 76.241.63.255196,608SBCIS-SBIS-6BLKAT&T Enterprises, LLC (AEL-360) · USDirect AllocationSep 15, 2006abuse@att.net
└ 76.239.144.0/212,048SBCIS-080106115130IsoTropic Networks, Inc (C01668592) · USReassignedJun 29, 2007abuse@att.net
via SBCIS-SBIS-6BLK

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

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 76.239.144.0/21

Prefix
76.239.144.0/21
Announced by
AS36426 IsoTropic Networks, Inc.
Type
Internet provider
RPKI
RPKI valid
Netname
SBCIS-080106115130
Registrant
IsoTropic Networks, Inc
RIR
ARIN
IPv4 market

Holder

Holder in the market →
Organization
AT&T Enterprises, LLC
Handle
AEL-360
Range
76.238.64.0 - 76.241.63.255
Registration type
Direct Allocation
Record created
Sep 15, 2006
Origin network

AS36426

US
Name
IsoTropic Networks, Inc.
Type
Internet provider
Registered
May 13, 2010
Domain
isosat.net
Industry
Satellite Communication
Spamhaus ASN-DROP
not listed