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

AS44143

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS44143

NameA1SERBIA-AS

OrganisationA1 Srbija d.o.o. Beograd

Country –

RIRRIPE NCC

Allocated23.11.2007

Abuse contactzloupotreba@a1.rs

Network Overview

IPv4 Prefixes14

IPv6 Prefixes3

Upstreams (Transit)5

Downstreams (Customers)5

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS1299Arelion (fka. Telia Carrier)AS13004Serbian Open Exchange DOO AS15958CETIN Ltd. Belgrade AS6204INTERKVM HOST SRL AS8447A1 Telekom Austria AG

AS44143A1SERBIA-AS

Downstreams (Customers)

AS205201Public Service Media Radio Television of Serbia AS213008APOTEKARSKA USTANOVA LILLY DROGERIE BEOGRAD AS31042Yettel d.o.o.AS394977TAKE-TWO INTERACTIVE SOFTWARE, INC.AS62012Generali Osiguranje Srbija

Upstreams (Transit) (5)

AS1299Arelion (fka. Telia Carrier)

AS13004Serbian Open Exchange DOO

AS15958CETIN Ltd. Belgrade

AS6204INTERKVM HOST SRL

AS8447A1 Telekom Austria AG

Downstreams (Customers) (5)

AS205201Public Service Media Radio Television of Serbia

AS213008APOTEKARSKA USTANOVA LILLY DROGERIE BEOGRAD

AS31042Yettel d.o.o.

AS394977TAKE-TWO INTERACTIVE SOFTWARE, INC.

AS62012Generali Osiguranje Srbija

IPv4 Prefixes (14)

185.37.24.0/22

95.86.60.0/22

188.120.112.0/21

188.120.112.0/22

188.120.96.0/21

37.19.104.0/21

77.243.16.0/20

95.86.4.0/22

95.86.8.0/22

198.143.176.0/21

188.120.104.0/21

95.86.48.0/21

188.120.96.0/20

188.120.116.0/22

IPv6 Prefixes (3)

2a00:61c0::/29

2a00:61c0::/32

2a00:61c1::/32

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.