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

AS28138

ASN

–

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS28138

NameASN28138

OrganisationWN INTERNET

Country

RIR–

Allocated18.03.2009

Network Overview

IPv4 Prefixes14

IPv6 Prefixes8

Upstreams (Transit)10

Downstreams (Customers)0

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS262462Aranet Play AS263484Rede Brasil Internet Banda Larga AS264997Direct Telecom Ltda AS265269MEGA TELE INFORMATICA AS265393FIRENET SERVIÇOS DE TELECOMUNICAÇÕES LTDA AS266414EXPRESS NETWORK-ME+4

AS28138ASN28138

Downstreams (Customers)

none

Upstreams (Transit) (10)

AS262462Aranet Play

AS263484Rede Brasil Internet Banda Larga

AS264997Direct Telecom Ltda

AS265269MEGA TELE INFORMATICA

AS265393FIRENET SERVIÇOS DE TELECOMUNICAÇÕES LTDA

AS266414EXPRESS NETWORK-ME

AS270484NOVA NETWORK TELECOM LTDA

AS270716GOVISTA TELECOMUNICAO IMPORTACAO LTDA

AS28209Under Servicos de Internet Ltda

AS61650WIRELESSNET INTERNET SOLUTIONS LTDA - ME

IPv4 Prefixes (14)

187.49.14.0/24

187.49.7.0/24

187.49.1.0/24

187.49.11.0/24

187.49.0.0/21

187.49.3.0/24

187.49.12.0/24

187.49.15.0/24

187.49.14.0/23

187.49.6.0/24

187.49.5.0/24

187.49.4.0/24

187.49.12.0/23

187.49.0.0/24

IPv6 Prefixes (8)

2804:d4:8000::/36

2804:d4:9000::/36

2804:d4:5000::/36

2804:d4:e000::/36

2804:d4:1000::/36

2804:d4::/36

2804:d4:f000::/36

2804:d4::/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.