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Data as of Nov 6, 2026

121.54.0.0/19

No anonymizer space · no proxy exits in 30 days

Smart Broadband, Inc.

Announcement
121.54.0.0/17
RPKI valid
Announced by
AS10139
Type
Mobile
>99% of it

Announcements

More specific

Announcements inside

PrefixOriginTypeHolderRPKI
121.54.16.0/20
since Aug 2010
AS10139MobileSmart Broadband, Inc.
121.54.16.0/21
since Aug 2010
AS10139MobileSmart Broadband, Inc.
121.54.28.0/22
since Apr 2025
AS10139MobileSmart Broadband, Inc.

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
121.54.0.0/1732,768SMARTBRO-PHSmart Broadband, Inc. (ORG-SBI2-AP) · PHALLOCATED PORTABLE—allsmarttscipbb@smart.com.ph
└ 121.54.22.192/298Carmen-Copper-CorpCarmen Copper CorpASSIGNED NON-PORTABLE—allsmarttscipbb@smart.com.ph
└ 121.54.24.240/2816MTU-Citiland10-TowerMTU Citiland10 TowerASSIGNED NON-PORTABLE—allsmarttscipbb@smart.com.ph

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

8,192 addresses
TypeAddressesShareRanges
Mobile8,168>99%6
Business240.29%2

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 121.54.0.0/17

Prefix
121.54.0.0/17
Announced by
AS10139 Smart Broadband, Inc.
Type
Mobile
RPKI
RPKI valid
Netname
SMARTBRO-PH
Registrant
Smart Broadband, Inc.
RIR
APNIC
Origin network

AS10139

PH
Name
Smart Broadband, Inc.
Type
Internet provider
Registered
Nov 21, 2006
Domain
smart.com.ph
Spamhaus ASN-DROP
not listed