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

AS151397

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS151397

NameCT-eSurfingCloud-CDN

OrganisationChina Telecom

Country

RIRAPNIC

Allocated07.06.2023

Abuse contactanti-spam@chinatelecom.cn

Network Overview

IPv4 Prefixes19

IPv6 Prefixes5

Upstreams (Transit)5

Downstreams (Customers)0

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS138915Kaopu Cloud HK Limited AS21859Zenlayer Inc AS23764China Telecom Global AS63199CDS Global Cloud Co., Ltd AS9886CTCSCI TECH LIMITED

AS151397CT-eSurfingCloud-CDN

Downstreams (Customers)

none

Upstreams (Transit) (5)

AS138915Kaopu Cloud HK Limited

AS21859Zenlayer Inc

AS23764China Telecom Global

AS63199CDS Global Cloud Co., Ltd

AS9886CTCSCI TECH LIMITED

IPv4 Prefixes (19)

193.119.12.0/24

193.119.30.0/24

193.119.21.0/24

193.119.11.0/24

193.119.0.0/24

193.119.17.0/24

193.119.8.0/24

193.119.13.0/24

193.119.25.0/24

193.119.10.0/24

193.119.6.0/24

193.119.15.0/24

193.119.4.0/24

193.119.19.0/24

193.119.20.0/24

193.119.28.0/24

193.119.22.0/24

193.119.9.0/24

193.119.7.0/24

IPv6 Prefixes (5)

240e:983:2020::/48

240e:983:2010::/48

240e:983:2013::/48

240e:983:2022::/48

240e:983:2030::/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.