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Tool
ASN Lookup
Networks, upstreams, peers and prefixes of an autonomous system
AS2497
ASN
APNIC
RIR
194
IPv4 Prefixes
11
IPv6 Prefixes
AS Information
ASNAS2497
NameIIJ
Country JP JP
RIRAPNIC
Network Overview
IPv4 Prefixes194
IPv6 Prefixes11
Upstreams IPv410
BGP Peers IPv4632
Upstreams (Transit Providers)
IPv4
AS12389 ROSTELECOM-AS
AS1257 SWIPNET
AS1273 CW
AS1299 TWELVE99
AS13030 INIT7
AS15412 FLAG-AS
AS174 COGENT-174
AS20485 TRANSTELECOM
AS2516 KDDI
AS2518 BIGLOBE
IPv4 Prefixes (194 total, showing 20)
218.228.96.0/19
210.233.171.0/24
133.236.0.0/16
157.65.192.0/21
121.50.160.0/21
178.239.126.0/24
133.194.128.0/18
203.139.228.0/22
133.254.0.0/16
216.98.96.0/19
210.138.0.0/16
133.194.224.0/20
210.233.184.0/24
206.132.160.0/20
202.24.194.0/24
219.105.0.0/19
150.61.54.0/24
133.194.0.0/17
202.244.222.0/24
103.140.136.0/23
IPv6 Prefixes (11 total, showing 10)
2401:ce20:d::/48
2403:5700::/48
2403:5700:1::/48
240a:71:8000::/36
2001:240::/32
240a:71:9000::/36
2001:48b0::/32
2400:3980::/32
2001:300::/32
2401:ce20:c::/48
BGP Peers IPv4 (632 total, showing 20)
AS10000
AS10003
AS10010
AS10013
AS10014
AS10016
AS101
AS10310
AS11164
AS11666
AS12389
AS1257
AS12654
AS1273
AS1299
AS13030
AS131160
AS13150
AS131896
AS131899
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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.

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