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Data as of Nov 8, 2026

151.249.144.0/21

No anonymizer space · no proxy exits in 30 days

Unitary enterprise A1 · space held by ALFA TELECOM s.r.o.

Announcement
151.249.128.0/18
RPKI valid
Announced by
AS42772
Type
Mobile

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
151.249.128.0/17
since May 2015
AS44546Residential12,712
183 always on
ALFA TELECOM s.r.o.
More specific

Announcements inside

PrefixOriginTypeHolderRPKI
151.249.144.0/22
since May 2024
AS42772MobileALFA TELECOM s.r.o.
151.249.148.0/22
since May 2024
AS42772MobileALFA TELECOM s.r.o.

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
151.249.128.0/1732,768CZ-ALFATELECOM-20120820ALFA TELECOM s.r.o. (ORG-ATS13-RIPE) · CZALLOCATED PAAug 20, 2012abuse@alfatelecom.cz
└ 151.249.128.0/1816,384A1-NETUnitary enterprise A1 (ORG-JMDC1-RIPE) · BYASSIGNED PAJul 7, 2014abuse@a1.by

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 151.249.128.0/18

Prefix
151.249.128.0/18
Announced by
AS42772 Unitary enterprise A1
Type
Mobile
Proxy exits
6,058
Always-on exits
86
RPKI
RPKI valid
Netname
A1-NET
Registrant
Unitary enterprise A1
RIR
RIPE NCC
IPv4 market

Holder

Holder in the market →
Organization
ALFA TELECOM s.r.o.
Handle
ORG-ATS13-RIPE
Range
151.249.128.0/17
Registration type
ALLOCATED PA
Record created
Aug 20, 2012
Origin network

AS42772

BY
Name
Unitary enterprise A1
Type
Internet provider
Registered
Apr 13, 2007
Domain
a1.by
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed