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

AS38566

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS38566

NameNTTCT-AS-TH-AP

OrganisationNTT (Thailand) Limited

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactap.eis-netops@global.ntt

Network Overview

IPv4 Prefixes10

IPv6 Prefixes1

Upstreams (Transit)4

Downstreams (Customers)3

BGP Peers1

AS Path (BGP neighbours)

Upstreams (Transit)

AS132876Symphony Communication (Thailand) PCL.AS17645NTT Singapore Pte Ltd AS2914NTT America, Inc.AS4651The Communications Authority of Thailand (CAT)

AS38566NTTCT-AS-TH-AP

Downstreams (Customers)

AS17645NTT Singapore Pte Ltd AS17978SERVCORP AUSTRALIAN HOLDINGS LTD AS24237Siam City Cement Public Company Limited (SCCC)

Upstreams (Transit) (4)

AS132876Symphony Communication (Thailand) PCL.

AS17645NTT Singapore Pte Ltd

AS2914NTT America, Inc.

AS4651The Communications Authority of Thailand (CAT)

Downstreams (Customers) (3)

AS17645NTT Singapore Pte Ltd

AS17978SERVCORP AUSTRALIAN HOLDINGS LTD

AS24237Siam City Cement Public Company Limited (SCCC)

IPv4 Prefixes (10)

103.108.49.0/24

45.116.216.0/22

203.78.204.0/22

180.222.144.0/20

103.130.180.0/23

103.233.200.0/22

103.246.24.0/22

116.68.144.0/20

103.233.202.0/24

103.66.128.0/22

IPv6 Prefixes (1)

2403:2800::/32

BGP Peers (1)

AS24482SG.GS

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.