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Autonomous System

AS10310 · Yahoo Holdings Inc.

Overview

AS10310 is announced on the Internet: RIPE RIS route collectors currently see 88 IPv4 prefixes and 22 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 106,240 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 117 upstream neighbours (transit providers or peers) and 31 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Telstra Global (AS4637), and PCCW Global (HK) Ltd. (AS3491). AS10310 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 10:57 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 69.147.64.1

The trace goes to 69.147.64.1, the first address of 69.147.64.0/18. 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 (88 prefixes)

PrefixAddresses
27.123.33.0/24256
27.123.34.0/23512
27.123.37.0/24256
27.123.44.0/221,024
27.123.192.0/23512
27.123.196.0/23512
66.196.64.0/212,048
66.196.70.0/23512
66.196.88.0/221,024
67.195.249.0/24256
68.142.248.0/24256
68.142.253.0/24256
68.180.128.0/204,096
69.147.64.0/1816,384
72.30.220.0/221,024
74.6.224.0/221,024
77.238.168.0/221,024
77.238.172.0/23512
77.238.174.0/24256
77.238.183.0/24256
77.238.189.0/24256
87.248.107.0/24256
102.165.180.0/24256
102.165.183.0/24256
103.40.110.0/23512
115.178.3.0/24256
115.178.4.0/23512
115.178.10.0/23512
115.178.12.0/221,024
124.108.64.0/212,048
124.108.76.0/23512
124.108.78.0/23512
124.108.80.0/221,024
124.108.84.0/23512
180.222.104.0/212,048
180.222.112.0/212,048
180.233.112.0/212,048
183.177.68.0/24256
183.177.69.0/24256
183.177.74.0/23512
183.177.76.0/221,024
183.177.80.0/23512
183.177.84.0/221,024
183.177.90.0/23512
184.165.0.0/204,096
184.165.16.0/204,096
188.125.88.0/24256
188.125.89.0/24256
188.125.90.0/24256
188.125.91.0/24256
188.125.93.0/24256
188.125.94.0/24256
188.125.95.0/24256
193.93.196.0/221,024
193.93.197.0/24256
198.178.157.0/24256
200.152.160.0/212,048
200.152.160.0/24256
200.152.161.0/24256
200.152.172.0/221,024
200.152.173.0/24256
202.43.202.0/23512
202.43.204.0/221,024
202.43.216.0/212,048
202.43.216.0/24256
202.47.143.0/24256
202.93.6.0/23512
202.160.176.0/204,096
202.165.96.0/24256
202.165.98.0/23512
202.165.108.0/23512
202.171.234.0/24256
203.84.208.0/23512
203.84.210.0/23512
203.84.213.0/24256
203.104.16.0/212,048
203.110.236.0/221,024
209.131.48.0/204,096
209.131.50.0/23512
209.131.52.0/23512
209.191.64.0/204,096
209.191.80.0/212,048
209.191.112.0/204,096
212.82.116.0/24256
212.82.118.0/23512
216.115.96.0/204,096
216.115.103.0/24256
216.252.96.0/198,192

IPv6 prefixes (22 prefixes)

Prefix
2001:43f8:1140::/48
2001:43f8:1141::/48
2001:4998::/32
2001:4998:f000::/36
2001:4998:f00e::/48
2406:2000::/32
2406:2000:f01e::/48
2406:6e00::/32
2406:6e00:f048::/48
2804:1bc::/32
2804:1bc:f026::/48
2804:1bc:f046::/48
2a00:1288::/32
2a00:1288:f032::/48
2a00:1288:f033::/48
2a00:1288:f035::/48
2a00:1288:f036::/48
2a00:1288:f037::/48
2a00:1288:f03c::/48
2a00:1288:f03d::/48
2a00:1288:f03e::/48
2a03:cd00::/32

Neighbours

Upstreams (transit or peers) (117)

ASNetworkVisibility
AS6939Hurricane Electric LLC1,623
AS4637Telstra Global1,564
AS3491PCCW Global (HK) Ltd.1,288
AS6762TELECOM ITALIA SPARKLE S.p.A.748
AS1299Arelion Sweden AB671
AS1221Telstra Limited661
AS3356Level 3 Parent, LLC604
AS7195EDGEUNO S.A.S465
AS9002RETN Limited416
AS3462Data Communication Business Group371
AS15830-368
AS13030Init7 (Switzerland) Ltd.148
AS8298IPng Networks GmbH124
AS25091IP-Max SA116
AS34549meerfarbig GmbH & Co. KG112
AS1273IDDQD-AS107
AS6057Administracion Nacional de Telecomunicaciones101
AS20764-98
AS29075IELO-LIAZO SERVICES SAS98
AS34019Hivane Association98
AS3935131173 Services AB98
AS4230CLARO S.A.95
AS35280F5 Networks SARL95
AS29632Netassist International EOOD90
AS24961WIIT AG88
AS2497Internet Initiative Japan Inc.86
AS48362Stadtwerke Feldkirch86
AS8218Zayo Infrastructure France SA84
AS6777-79
AS34177Celeste SAS76

The 30 most visible of 117.

Downstreams (customers) (31)

ASNetworkVisibility
AS10880Yahoo Holdings Inc.1,370
AS7280Yahoo Holdings Inc.1,294
AS14778Yahoo Holdings Inc.939
AS56173internet content provider544
AS45501Yahoo Corp Network517
AS24376Yahoo China Datacenter502
AS10230internet content provider499
AS18293Internet content provider486
AS38032internet content provider486
AS26101Yahoo Holdings Inc.478
AS7233-465
AS28122-461
AS36646-461
AS36647-460
AS14780-451
AS36088-450
AS14196-449
AS36752-448
AS5779-447
AS14776-447
AS14777-445
AS14779-443
AS36229-443
AS393245-443
AS34010-382
AS203220-369
AS203070-368
AS203219-368
AS43428-366
AS16515-268

The 30 most visible of 31.

187 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.