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

AS27818

ASN

LACNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS27818

Name27818

OrganisationCotesma

Country –

RIRLACNIC

Allocated31.03.2006

Abuse contactmarcos.pytel@cotesma.com.ar

Network Overview

IPv4 Prefixes71

IPv6 Prefixes18

Upstreams (Transit)4

Downstreams (Customers)0

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS22927Telefonica de Argentina AS52294CABASE Camara Arg de Base de Datos y Serv en Linea AS52361ARSAT - Empresa Argentina de Soluciones Satelitales S.A.AS7049Silica Networks Argentina S.A.

AS2781827818

Downstreams (Customers)

none

Upstreams (Transit) (4)

AS22927Telefonica de Argentina

AS52294CABASE Camara Arg de Base de Datos y Serv en Linea

AS52361ARSAT - Empresa Argentina de Soluciones Satelitales S.A.

AS7049Silica Networks Argentina S.A.

IPv4 Prefixes (71)

181.114.158.0/24

181.114.131.0/24

131.161.152.0/24

201.220.183.0/24

181.114.157.0/24

181.114.142.0/24

201.220.189.0/24

201.220.180.0/24

201.220.185.0/24

181.114.154.0/24

201.220.160.0/24

201.220.175.0/24

201.220.179.0/24

181.114.148.0/24

181.114.153.0/24

201.220.181.0/24

201.220.161.0/24

201.220.177.0/24

131.161.154.0/24

181.114.144.0/24

201.220.162.0/24

201.220.186.0/23

201.220.178.0/24

181.114.143.0/24

181.114.133.0/24

181.114.156.0/24

201.220.184.0/24

181.114.137.0/24

201.220.164.0/24

201.220.169.0/24

181.114.132.0/24

181.114.140.0/24

181.114.141.0/24

131.161.153.0/24

181.114.135.0/24

201.220.187.0/24

181.114.130.0/24

201.220.166.0/24

201.220.182.0/24

181.114.139.0/24

201.220.174.0/24

181.114.149.0/24

181.114.147.0/24

201.220.176.0/24

181.114.146.0/24

201.220.173.0/24

181.114.138.0/24

201.220.188.0/24

181.114.136.0/24

201.220.170.0/24

201.220.190.0/24

181.114.129.0/24

200.47.43.0/24

201.220.165.0/24

201.220.168.0/24

181.114.152.0/24

201.220.167.0/24

201.220.188.0/22

201.220.191.0/24

181.114.159.0/24

181.114.151.0/24

181.114.128.0/24

181.114.155.0/24

201.220.171.0/24

201.220.172.0/24

181.114.150.0/24

181.114.145.0/24

131.161.155.0/24

181.114.134.0/24

201.220.186.0/24

201.220.163.0/24

IPv6 Prefixes (18)

2803:3380:1200::/40

2803:3380:5000::/36

2803:3380:8000::/36

2803:3380:3000::/36

2803:3380:1003::/48

2803:3380:6000::/36

2803:3380:b000::/36

2803:3380:d000::/36

2803:3380:ff00::/40

2803:3380:9000::/36

2803:3380:c000::/36

2803:3380:fe00::/40

2803:3380:e000::/36

2803:3380:1100::/40

2803:3380:a000::/36

2803:3380:7000::/36

2803:3380:4000::/36

2803:3380:2000::/36

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.