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Autonomous System

AS10010 · TOKAI Communications Corporation

Overview

AS10010 is announced on the Internet: RIPE RIS route collectors currently see 186 IPv4 prefixes and 7 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 1,502,720 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 17 upstream neighbours (transit providers or peers) and 40 downstream neighbours (customers or networks it carries). Its most visible upstreams are Telstra Global (AS4637), Arelion Sweden AB (AS1299), and Internet Initiative Japan Inc. (AS2497). AS10010 was assigned by APNIC, and its registration country is Japan.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 7:03 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 42.124.0.1

The trace goes to 42.124.0.1, the first address of 42.124.0.0/16. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (186 prefixes)

PrefixAddresses
27.98.0.0/1732,768
27.98.128.0/1816,384
27.121.0.0/198,192
27.121.32.0/204,096
27.121.43.0/24256
27.121.48.0/204,096
42.124.0.0/1665,536
42.125.0.0/1732,768
42.125.128.0/1816,384
42.125.192.0/198,192
42.125.196.0/24256
42.125.225.0/24256
42.125.226.0/23512
42.125.228.0/221,024
42.125.232.0/212,048
42.125.234.0/24256
42.125.240.0/212,048
42.125.244.0/24256
42.125.245.0/24256
42.125.248.0/23512
42.125.251.0/24256
42.125.252.0/221,024
42.126.0.0/1665,536
42.127.0.0/1732,768
42.127.128.0/1816,384
42.127.192.0/1816,384
42.127.240.0/24256
42.127.247.0/24256
42.127.250.0/24256
42.127.251.0/24256
42.127.255.0/24256
43.224.28.0/24256
45.90.85.0/24256
45.90.86.0/24256
45.90.87.0/24256
45.120.79.0/24256
45.251.132.0/221,024
59.84.0.0/1665,536
59.84.16.0/24256
59.85.0.0/1665,536
59.85.64.0/1816,384
59.85.224.0/198,192
59.86.0.0/1816,384
59.86.64.0/1816,384
59.86.128.0/198,192
61.120.224.0/198,192
61.198.96.0/198,192
61.198.104.0/212,048
61.198.112.0/204,096
61.200.96.0/198,192
61.200.112.0/204,096
61.206.64.0/204,096
61.211.176.0/204,096
61.211.192.0/198,192
61.211.194.0/23512
91.200.58.0/24256
94.74.184.0/24256
94.74.185.0/24256
103.4.68.0/221,024
103.26.34.0/24256
103.37.10.0/23512
103.41.60.0/24256
103.41.240.0/221,024
103.51.80.0/221,024
103.97.208.0/24256
103.136.196.0/24256
103.136.197.0/24256
103.136.198.0/24256
103.136.199.0/24256
103.217.136.0/23512
103.239.92.0/221,024
103.239.216.0/221,024
110.172.56.0/212,048
111.67.112.0/212,048
111.67.120.0/221,024
111.67.124.0/221,024
112.137.192.0/1816,384
112.138.0.0/1732,768
112.138.128.0/1732,768
112.139.0.0/1732,768
112.139.128.0/1732,768
112.140.0.0/204,096
112.140.16.0/204,096
116.68.217.0/24256
116.68.218.0/23512
116.68.220.0/221,024
116.254.0.0/1816,384
116.254.64.0/198,192
117.104.0.0/1816,384
118.151.192.0/204,096
119.83.0.0/1816,384
119.83.64.0/1816,384
119.83.128.0/1732,768
120.136.192.0/1816,384
120.137.128.0/1732,768
124.47.192.0/1816,384
124.47.193.0/24256
133.186.0.0/204,096
133.186.32.0/204,096
133.186.48.0/221,024

Showing the first 100 of 186, in address order. Complete list on RIPEstat

IPv6 prefixes (7 prefixes)

Prefix
2401:af80::/33
2403:1f00::/32
2403:7800::/32
2403:7800:2018::/48
2403:7800:2019::/48
2406:bb00::/30
2406:bb04::/30

Neighbours

Upstreams (transit or peers) (17)

ASNetworkVisibility
AS4637Telstra Global4,834
AS1299Arelion Sweden AB2,849
AS2497Internet Initiative Japan Inc.1,550
AS174Cogent Communications, LLC509
AS17676SoftBank Corp.344
AS6939Hurricane Electric LLC333
AS2518BIGLOBE Inc.153
AS20485Joint Stock Company TransTeleCom99
AS8220COLT Technology Services Group Limited86
AS59103SoftEther Corporation69
AS132132MyRepublic Ltd.47
AS9002RETN Limited27
AS9304HGC Global Communications Limited20
AS18125-5
AS8966EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC4
AS12389PJSC Rostelecom1
AS60068Datacamp Limited1

Downstreams (customers) (40)

ASNetworkVisibility
AS23642OBIS1,493
AS59103SoftEther Corporation854
AS17953BroadBand Security, Inc.454
AS17678Gunma Internet Co,.ltd452
AS133780Quantum Mesh Co.,Ltd.452
AS23791LCV Corporation423
AS23836RELATION Co., Ltd.408
AS24257Japan Internet Xing Co., Ltd.339
AS17683Wingtechnology Communications, Inc.334
AS7690Mirai Communication Network Inc.320
AS55385-320
AS146969-317
AS131156-301
AS4678-297
AS131939-283
AS63805-276
AS23795-265
AS9990-264
AS131946-263
AS38642-262
AS131940-262
AS132504-256
AS23785-204
AS131915-183
AS63779-141
AS23639-137
AS18069-76
AS18077-70
AS9351-65
AS4637Telstra Global53

The 30 most visible of 40.

40 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.