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

AS139203

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS139203

NameCHINANET-Guizhou-Guian-IDC

OrganisationChina Telecom

Country

RIRAPNIC

Allocated31.05.2019

Abuse contactanti-spam@chinatelecom.cn

Network Overview

IPv4 Prefixes20

IPv6 Prefixes3

Upstreams (Transit)1

Downstreams (Customers)1

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS4134China Telecom Backbone

AS139203CHINANET-Guizhou-Guian-IDC

Downstreams (Customers)

AS55990Huawei Cloud Service data center

Upstreams (Transit) (1)

AS4134China Telecom Backbone

Downstreams (Customers) (1)

AS55990Huawei Cloud Service data center

IPv4 Prefixes (20)

58.42.14.0/24

111.124.144.0/24

58.42.10.0/24

111.124.192.0/19

111.123.56.0/21

58.42.8.0/21

106.108.72.0/21

111.123.54.0/24

58.42.48.0/20

106.108.56.0/21

111.124.64.0/20

58.42.5.0/24

58.42.9.0/24

106.108.88.0/21

111.123.55.0/24

58.42.15.0/24

111.124.76.0/24

58.42.2.0/24

111.123.53.0/24

119.0.64.0/19

IPv6 Prefixes (3)

240e:938:a00::/44

240e:103:8b00::/44

240e:938:a03::/48

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.