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Data as of Nov 7, 2026

157.238.0.0/18

Anonymizer · ISP proxy

RCN · space held by NTT America, Inc.

Announcement
this exact prefix
RPKI valid
Announced by
AS6079
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
NTT America, Inc.
record created Feb 4, 1992
2 · Leased from
Rackdog
for its owner NTT America, Inc.
3 · Announced by
AS6079 RCN
since Jun 2025 · 16 mo ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 157.238.0.0/18/24s
Rackdog
16,384100%
64
Leased from

Owners leasing their own space

NameIn 157.238.0.0/18/24s
NTT America, Inc.
16,384100%
64

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

157.238.0.0/18

From the registry to its use

  1. Feb 4, 1992
    Registry record
    NTT America, Inc.
    Direct Allocation (legacy, pre-1997)
    157.238.0.0/16
  2. May 9, 2005– Jun 27, 2016
    Announced
    AS2914 NTT America, Inc.
    as part of 157.238.0.0/16
    157.238.0.0/16
  3. Aug 15, 2016– today
    Announced
    AS2914 NTT America, Inc.
    as part of 157.238.0.0/16
    157.238.0.0/16
  4. Jun 29, 2025– today
    Announced
    AS6079 RCN
    Internet provider
  5. Jul 3, 2025
    Route object
    AS1299 Arelion Sweden AB
    NTTCOM route object for AS1299 Arelion Sweden AB, maintainer MAINT-NTTCOM-BB
  6. Jul 3, 2025
    Route object
    AS3257 GTT Communications Inc.
    NTTCOM route object for AS3257 GTT Communications Inc., maintainer MAINT-NTTCOM-BB
  7. Jul 3, 2025
    Route object
    AS6079 RCN
    NTTCOM route object for AS6079 RCN, maintainer MAINT-NTTCOM-BB
  8. Jul 3, 2025
    Route object
    AS7029 Windstream Communications LLC
    NTTCOM route object for AS7029 Windstream Communications LLC, maintainer MAINT-NTTCOM-BB
  9. Jul 3, 2025
    Route object
    AS7843 Charter Communications Inc
    NTTCOM route object for AS7843 Charter Communications Inc, maintainer MAINT-NTTCOM-BB
  10. Jul 3, 2025
    Route object
    AS11404 Wave Broadband
    NTTCOM route object for AS11404 Wave Broadband, maintainer MAINT-NTTCOM-BB
  11. Jul 3, 2025
    Route object
    AS20115 Charter Communications LLC
    NTTCOM route object for AS20115 Charter Communications LLC, maintainer MAINT-NTTCOM-BB
  12. Jul 3, 2025
    Route object
    AS398465 Rackdog, LLC
    NTTCOM route object for AS398465 Rackdog, LLC, maintainer MAINT-NTTCOM-BB
  13. Jul 4, 2025
    Route object
    Rackdog
    RADB route object for AS6079 RCN, maintainer MAINT-AS398465
  14. Jul 11, 2025– Jul 22, 2025
    Announced
    AS398465 Rackdog, LLC
    Hosting
  15. May 19, 2026
    Assigned
    RCN
    Reassigned
    157.238.0.0/18
  16. today
    Leased from
    Rackdog
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesProxy exitsHolderRPKI
157.238.0.0/16
since Aug 2016
AS2914Internet provider1,7922.7%ISP proxy, Datacenter proxy185
1 always on
NTT America, Inc.

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.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
157.238.0.0/1665,536NTTA-157-238NTT America, Inc. (NTTAM-1) · USDirect AllocationFeb 4, 1992abuse@ntt.net
└ 157.238.0.0/1816,384RCN-157-238RCN (C11598215) · USReassignedMay 19, 2026abuse@ntt.net
via NTTA-157-238

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
IPv4 market

Holder

Holder in the market →
Organization
NTT America, Inc.
Handle
NTTAM-1
Range
157.238.0.0/16
Registration type
Direct Allocation
Record created
Feb 4, 1992
Legacy
yes
Origin network

AS6079

US
Name
RCN
Type
Internet provider
Registered
Apr 4, 2001
Domain
astound.com
Website
www.astound.com
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed