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

AS21283

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS21283

NameA1SI-AS

OrganisationA1SI-MNT

Country –

RIRRIPE NCC

Allocated20.09.2002

Abuse contactabuse@a1.si

Network Overview

IPv4 Prefixes18

IPv6 Prefixes3

Upstreams (Transit)12

Downstreams (Customers)34

BGP Peers3

AS Path (BGP neighbours)

Upstreams (Transit)

AS14840BR.DIGITAL AS1853ACONET AS22356Durand do Brasil Ltda AS263444Open X Tecnologia Ltda AS264409Huge Networks AS28682Posta Slovenije d.o.o.+6

AS21283A1SI-AS

Downstreams (Customers)

AS15822AGENCIJA ZA ENERGIJO AS196846A1 Slovenija telekomunikacijske storitve,d.d.AS196895Uprava Republike Slovenije za javna placila AS197391Tobacna Ljubljana d.o.o.AS197907AKSON, poslovno in informacijsko svetovanje, d.o.o.AS198061Valicon d.o.o.+28

Upstreams (Transit) (12)

AS14840BR.DIGITAL

AS1853ACONET

AS22356Durand do Brasil Ltda

AS263444Open X Tecnologia Ltda

AS264409Huge Networks

AS28682Posta Slovenije d.o.o.

AS3303Swisscom (Schweiz) AG

AS39120Convergenze S.p.A.

AS43061Stelkom d.o.o.

AS6939Hurricane Electric LLC

AS8447A1 Telekom Austria AG

AS9498Bharti Airtel Ltd.

Downstreams (Customers) (34)

AS15822AGENCIJA ZA ENERGIJO

AS196846A1 Slovenija telekomunikacijske storitve,d.d.

AS196895Uprava Republike Slovenije za javna placila

AS197391Tobacna Ljubljana d.o.o.

AS197907AKSON, poslovno in informacijsko svetovanje, d.o.o.

AS198061Valicon d.o.o.

AS198524iLOL d.o.o.

AS198827Elektro Gorenjska, podjetje za distribucijo elektricne energije, d.d.

AS199612Dun & Bradstreet d.o.o.

AS201395IT-TIM d.o.o.

AS203618UB330.net d.o.o.

AS210197ROK TAJZEL

IPv4 Prefixes (18)

90.157.128.0/17

46.122.64.0/21

85.10.32.0/20

46.122.0.0/15

188.64.24.0/21

85.10.0.0/19

146.212.0.0/16

46.122.96.0/21

185.173.52.0/22

212.18.32.0/19

80.95.224.0/20

94.127.24.0/21

62.84.224.0/20

109.239.176.0/20

46.164.0.0/18

185.28.8.0/22

92.37.0.0/17

213.157.224.0/19

IPv6 Prefixes (3)

2001:15c0::/29

2a00:1a20::/29

2a00:1a20::/32

BGP Peers (3)

AS198150SIACOM JSC

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS3212Telemach Slovenija d.o.o.

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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.