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Autonomous System

AS9824 · JCOM Co., Ltd.

Overview

AS9824 is announced on the Internet: RIPE RIS route collectors currently see 233 IPv4 prefixes and 62 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 4,745,216 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 8 upstream neighbours (transit providers or peers) and 22 downstream neighbours (customers or networks it carries). Its most visible upstreams are Internet Initiative Japan Inc. (AS2497), KDDI CORPORATION (AS2516), and Hurricane Electric LLC (AS6939). AS9824 was assigned by APNIC, and its registration country is Japan.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 12:02 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 27.136.0.1

The trace goes to 27.136.0.1, the first address of 27.136.0.0/13. 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 (233 prefixes)

PrefixAddresses
27.136.0.0/13524,288
27.136.0.0/1732,768
27.136.128.0/1732,768
27.137.0.0/1665,536
27.138.0.0/1665,536
27.139.0.0/1665,536
27.140.0.0/1665,536
27.141.0.0/1665,536
27.142.0.0/1732,768
27.142.128.0/1732,768
27.143.0.0/1665,536
42.144.0.0/13524,288
42.144.0.0/1665,536
42.145.0.0/1665,536
42.146.0.0/1665,536
42.147.0.0/1665,536
42.148.0.0/1665,536
42.149.0.0/1732,768
42.149.128.0/1732,768
42.150.0.0/1665,536
42.150.0.0/1816,384
42.150.64.0/1816,384
42.150.128.0/1816,384
42.150.192.0/1816,384
42.151.0.0/1665,536
59.166.0.0/1665,536
59.166.0.0/1732,768
59.166.128.0/1732,768
59.168.0.0/1665,536
59.168.0.0/1732,768
59.168.128.0/1732,768
59.169.0.0/1665,536
59.169.0.0/1816,384
59.169.64.0/1816,384
59.169.128.0/1732,768
59.170.0.0/1665,536
59.170.0.0/1732,768
59.170.0.0/1816,384
59.170.64.0/1816,384
59.170.128.0/1732,768
59.170.128.0/1816,384
59.170.192.0/1816,384
59.171.0.0/1665,536
59.171.0.0/1732,768
59.171.128.0/1732,768
60.58.0.0/1665,536
60.58.0.0/1732,768
60.58.128.0/1732,768
60.59.0.0/1665,536
60.59.0.0/1732,768
60.59.128.0/1732,768
60.60.0.0/1665,536
60.60.0.0/1732,768
60.60.128.0/1732,768
60.61.0.0/1665,536
60.61.0.0/1732,768
60.61.128.0/1732,768
60.62.0.0/1665,536
60.62.0.0/1732,768
60.62.128.0/1732,768
61.21.0.0/1665,536
61.21.0.0/1732,768
61.21.128.0/1732,768
61.22.0.0/1665,536
61.22.0.0/1732,768
61.22.0.0/1816,384
61.22.64.0/1816,384
61.22.128.0/1732,768
61.22.128.0/1816,384
61.22.192.0/1816,384
61.23.0.0/1665,536
61.23.0.0/1732,768
61.23.128.0/1732,768
61.24.0.0/1665,536
61.24.0.0/1732,768
61.24.128.0/1732,768
61.25.0.0/1665,536
61.25.0.0/1732,768
61.25.128.0/1732,768
61.26.0.0/1665,536
61.26.0.0/1732,768
61.26.128.0/1732,768
61.27.0.0/1665,536
61.27.0.0/1732,768
61.27.128.0/1732,768
61.27.192.0/1816,384
110.128.0.0/13524,288
110.128.0.0/1732,768
110.128.128.0/1732,768
110.129.0.0/1665,536
110.129.128.0/1816,384
110.129.192.0/1816,384
110.130.0.0/1665,536
110.131.0.0/1665,536
110.132.0.0/1665,536
110.133.0.0/1732,768
110.133.128.0/1732,768
110.134.0.0/1665,536
110.134.0.0/1816,384
110.134.64.0/1816,384

Showing the first 100 of 233, in address order. Complete list on RIPEstat

IPv6 prefixes (62 prefixes)

Prefix
2001:ff0::/32
2001:ff0::/37
2001:ff0:800::/37
2001:ff0:1000::/37
2001:ff0:1800::/37
2001:ff0:2000::/37
2001:ff0:2800::/37
2001:ff0:3000::/37
2001:ff0:3800::/37
2001:ff0:4000::/37
2001:ff0:4800::/37
2001:ff0:5000::/37
2001:ff0:5800::/37
2001:ff0:6000::/37
2001:ff0:6800::/37
2001:ff0:7000::/37
2001:ff0:7800::/37
2001:ff0:8000::/37
2001:ff0:8800::/37
2001:ff0:9000::/37
2001:ff0:9800::/37
2001:ff0:a000::/37
2001:ff0:a800::/37
2001:ff0:b000::/37
2001:ff0:b800::/37
2001:ff0:c000::/37
2001:ff0:c800::/37
2001:ff0:d000::/37
2001:ff0:d800::/37
2001:ff0:e000::/37
2001:ff0:e800::/37
2001:ff0:f000::/37
2001:ff0:f800::/37
2405:1200::/29
2405:1200::/34
2405:1200:4000::/34
2405:1200:8000::/34
2405:1200:c000::/34
2405:1201::/34
2405:1201:4000::/34
2405:1201:8000::/34
2405:1201:c000::/34
2405:1202::/34
2405:1202:4000::/34
2405:1202:8000::/34
2405:1202:c000::/34
2405:1203::/34
2405:1203:4000::/34
2405:1203:8000::/34
2405:1203:c000::/34
2405:1204::/34
2405:1204:4000::/34
2405:1204:8000::/34
2405:1204:c000::/34
2405:1205::/34
2405:1205:4000::/34
2405:1205:8000::/34
2405:1205:c000::/34
2405:1206::/34
2405:1206:4000::/34
2405:1206:8000::/34
2405:1206:c000::/34

Neighbours

Upstreams (transit or peers) (8)

ASNetworkVisibility
AS2497Internet Initiative Japan Inc.4,182
AS2516KDDI CORPORATION3,267
AS6939Hurricane Electric LLC633
AS1299Arelion Sweden AB524
AS8220COLT Technology Services Group Limited173
AS9002RETN Limited34
AS2518BIGLOBE Inc.25
AS60068Datacamp Limited9

Downstreams (customers) (22)

ASNetworkVisibility
AS9617JCOM Co., Ltd.1,076
AS4721JCOM Co., Ltd.829
AS9378JCOM Co., Ltd.537
AS18136JCOM Co., Ltd.534
AS23788JCOM Co., Ltd.534
AS18134JCOM Co., Ltd.532
AS24276JCOM Co., Ltd.530
AS45675JCOM Co., Ltd.530
AS9614JCOM Marketing Co.,Ltd.268
AS23790JCOM Co., Ltd.267
AS7686-265
AS23635-265
AS23808-265
AS24290-265
AS45690-265
AS7524-215
AS17961-139
AS131937-127
AS18283-66
AS24255-18
AS9351-14
AS17534-7

1 more neighbour appears 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.