An Autonomous System Number (ASN) is a unique number assigned to a network in global internet routing. Every provider that participates directly on the internet has its own ASN (e.g. AS15169 for Google).

What are upstreams, peers and prefixes?

Upstreams are transit providers through which an AS reaches the internet. Peers are networks with direct traffic exchange. Prefixes are the IP address ranges the AS announces via BGP.

Where does the ASN data come from?

The data comes from the official RDAP services of the RIRs (RIPE, ARIN, etc.) and from RIPEstat (prefixes and neighbour ASNs).

ASN Lookup – Networks, Upstreams and Prefixes

AS28952

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS28952

NameO2BSSK

OrganisationO2 Business Services, a.s

Country –

RIRRIPE NCC

Allocated08.06.2015

Abuse contactcsc@o2bs.sk

Network Overview

IPv4 Prefixes9

IPv6 Prefixes2

Upstreams (Transit)18

Downstreams (Customers)7

BGP Peers17

AS Path (BGP neighbours)

Upstreams (Transit)

AS13194UAB "Bite Lietuva"AS14840BR.DIGITAL AS174Cogent Communications, LLC AS1764Next Layer Telecommunications AS20562Open Peering (Broadband Hosting B.V.)AS22356Durand do Brasil Ltda+12

AS28952O2BSSK

Downstreams (Customers)

AS204691PLAYMAX s.r.o.AS205055Geetoo Technology SK s. r. o.AS25496ZSR - ZT Bratislava AS49659SkyToll, a. s.AS57414eustream as AS60715Lombard s.r.o.+1

Upstreams (Transit) (18)

AS13194UAB "Bite Lietuva"

AS14840BR.DIGITAL

AS174Cogent Communications, LLC

AS1764Next Layer Telecommunications

AS20562Open Peering (Broadband Hosting B.V.)

AS22356Durand do Brasil Ltda

AS264409Huge Networks

AS31230SIX.SK Route Servers

AS3303Swisscom (Schweiz) AG

AS33891Core-Backbone GmbH

AS50629LWLcom GmbH

AS5610O2 Czech Republic, a.s.

Downstreams (Customers) (7)

AS204691PLAYMAX s.r.o.

AS205055Geetoo Technology SK s. r. o.

AS25496ZSR - ZT Bratislava

AS49659SkyToll, a. s.

AS57414eustream as

AS60715Lombard s.r.o.

AS60890CentralNic Ltd

IPv4 Prefixes (9)

91.191.80.0/22

90.176.0.0/19

37.152.96.0/19

46.34.224.0/19

31.3.32.0/19

151.236.224.0/20

185.103.144.0/22

37.58.0.0/20

91.191.69.0/24

IPv6 Prefixes (2)

2a03:6947:1800::/40

2a06:2c40::/29

BGP Peers (17)

AS198150SIACOM JSC

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS24482SG.GS

AS28917Fiord Networks, UAB

AS29504Freenet Liberec, z.s.

AS3212Telemach Slovenija d.o.o.

AS35369LINZ STROM GAS WAERME GmbH fuer Energiedienstleistungen und Telekommunikation

AS36236NetActuate, Inc

AS37721Virtual Technologies & Solutions

AS40994Alwyzon (Hohl IT)

AS41327Fiber Telecom S.p.A.

AS47692Nessus GmbH

My IP ASN Lookup IP Lookup WHOIS DNS Lookup

What is an ASN?

An Autonomous System Number (ASN) is a unique number assigned to a network on the internet. Upstreams are the transit providers through which the AS reaches the internet. Peers are networks with which direct traffic exchange takes place. Prefixes are the IP address ranges that the AS announces to the internet. Data via RIPE NCC RDAP and RIPEstat API.