ASN Lookup – Networks, Upstreams and Prefixes

AS4538

ASN

APNIC

RIR

3431

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS4538

NameERX-CERNET-BKB

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactabuse@cernet.edu.cn

Network Overview

IPv4 Prefixes3431

IPv6 Prefixes8

Upstreams IPv410

BGP Peers IPv433

Upstreams (Transit Providers)

IPv4

AS1299 TWELVE99

AS140570 HKBCS-AS-AP

AS15412 FLAG-AS

AS174 COGENT-174

AS23764 CTGNet

AS23855 SINGAREN-GIX-AS-AP

AS23910 CNGI-CERNET2-AS-AP

AS23911 CNGI-BJIX-AS-AP

AS2914 NTT-DATA-2914

AS3491 PCCWG-APAC-HK

IPv4 Prefixes (3431 total, showing 20)

219.229.128.0/24

222.204.120.0/24

222.16.66.0/24

211.82.176.0/21

202.200.64.0/24

210.38.56.0/22

211.68.97.0/24

59.67.206.0/23

211.83.112.0/20

202.192.0.0/13

203.91.120.0/21

218.196.32.0/21

222.26.163.0/24

202.201.106.0/24

210.26.148.0/24

222.203.170.0/23

125.221.248.0/23

210.30.37.0/24

222.16.90.0/23

110.64.152.0/24

IPv6 Prefixes (8 total)

2001:daa:5::/48

2001:da8:ff00::/40

2001:daa:2::/48

2001:daa:6::/48

2001:daa:1::/48

2001:daa:4::/48

2001:daa:3::/48

2001:da8:257::/48

BGP Peers IPv4 (33 total, showing 20)

AS131578

AS133111

AS133465

AS134169

AS138369

AS138371

AS138378

AS138441

AS139139

AS151229

AS23910

AS23911

AS24348

AS24349

AS24350

AS24352

AS24353

AS24355

AS24357

AS24358

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.