Autonomous System
AS9505 · Taiwan Internet Gateway
Overview
AS9505 is announced on the Internet: RIPE RIS route collectors currently see 36 IPv4 prefixes and 9 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 24,576 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 51 upstream neighbours (transit providers or peers) and 120 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), Cogent Communications, LLC (AS174), and Level 3 Parent, LLC (AS3356). AS9505 was assigned by APNIC, and its registration country is Taiwan.
Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:57 PM UTC. This page is refreshed at most every 12 hours.
Go further
The trace goes to 175.41.48.1, the first address of 175.41.48.0/20. 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 (36 prefixes)
| Prefix | Addresses |
|---|---|
| 66.171.112.0/21 | 2,048 |
| 175.41.48.0/20 | 4,096 |
| 175.41.48.0/24 | 256 |
| 175.41.49.0/24 | 256 |
| 175.41.50.0/24 | 256 |
| 175.41.51.0/24 | 256 |
| 175.41.52.0/24 | 256 |
| 175.41.54.0/24 | 256 |
| 175.41.55.0/24 | 256 |
| 175.41.56.0/24 | 256 |
| 175.41.57.0/24 | 256 |
| 175.41.58.0/24 | 256 |
| 175.41.61.0/24 | 256 |
| 175.41.62.0/24 | 256 |
| 175.41.63.0/24 | 256 |
| 175.111.224.0/20 | 4,096 |
| 175.111.234.0/24 | 256 |
| 175.111.235.0/24 | 256 |
| 175.111.236.0/24 | 256 |
| 175.111.237.0/24 | 256 |
| 175.111.238.0/24 | 256 |
| 175.111.239.0/24 | 256 |
| 175.111.240.0/21 | 2,048 |
| 203.78.176.0/20 | 4,096 |
| 203.78.179.0/24 | 256 |
| 203.78.180.0/24 | 256 |
| 203.78.182.0/24 | 256 |
| 203.160.224.0/20 | 4,096 |
| 203.160.231.0/24 | 256 |
| 203.160.232.0/24 | 256 |
| 203.160.233.0/24 | 256 |
| 203.160.235.0/24 | 256 |
| 208.70.200.0/21 | 2,048 |
| 208.70.200.0/24 | 256 |
| 220.128.48.0/21 | 2,048 |
| 220.128.48.0/24 | 256 |
IPv6 prefixes (9 prefixes)
| Prefix |
|---|
| 2001:b200::/32 |
| 2001:b200:600::/40 |
| 2001:b200:1e00::/40 |
| 2001:b200:1f00::/40 |
| 2001:b200:2000::/35 |
| 2001:b200:2200::/40 |
| 2001:b200:3e00::/40 |
| 2001:b200:3f00::/40 |
| 2606:c00::/32 |
Neighbours
Upstreams (transit or peers) (51)
| AS | Network | Visibility |
|---|---|---|
| AS1299 | Arelion Sweden AB | 3,727 |
| AS174 | Cogent Communications, LLC | 2,865 |
| AS3356 | Level 3 Parent, LLC | 2,589 |
| AS6939 | Hurricane Electric LLC | 988 |
| AS9002 | RETN Limited | 672 |
| AS9304 | HGC Global Communications Limited | 436 |
| AS2914 | NTT America, Inc. | 234 |
| AS20485 | Joint Stock Company TransTeleCom | 155 |
| AS38008 | Aperture Science Limited | 148 |
| AS33891 | Core-Backbone GmbH | 144 |
| AS9680 | - | 143 |
| AS2497 | Internet Initiative Japan Inc. | 137 |
| AS39351 | 31173 Services AB | 128 |
| AS6453 | TATA COMMUNICATIONS (AMERICA) INC | 119 |
| AS8220 | COLT Technology Services Group Limited | 110 |
| AS4637 | Telstra Global | 94 |
| AS7473 | Singapore Telecommunications Ltd | 80 |
| AS132132 | - | 77 |
| AS2516 | KDDI CORPORATION | 70 |
| AS3491 | PCCW Global (HK) Ltd. | 59 |
| AS12552 | - | 53 |
| AS1267 | WIND TRE S.P.A. | 45 |
| AS45250 | Vocom International Telecommunications AP Area | 42 |
| AS8966 | EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC | 36 |
| AS30844 | Liquid Telecommunications Ltd | 36 |
| AS8359 | MTS PJSC | 28 |
| AS2856 | British Telecommunications Limited | 27 |
| AS15802 | Emirates Integrated Telecommunications Company PJSC | 27 |
| AS40065 | - | 22 |
| AS6663 | Euroweb Romania S.R.L. | 19 |
The 30 most visible of 51.
Downstreams (customers) (120)
| AS | Network | Visibility |
|---|---|---|
| AS9924 | Taiwan Fixed Network, Telco and Network Service Provider. | 2,478 |
| AS45250 | Vocom International Telecommunications AP Area | 1,845 |
| AS18182 | Sony Network Taiwan Limited | 1,119 |
| AS7532 | Gamania CloudForce | 1,062 |
| AS7533 | Savecom International Inc. | 1,041 |
| AS9416 | Hoshin Multimedia Center Inc. | 849 |
| AS10126 | Taiwan Internet Gateway | 694 |
| AS17408 | AboveNet Communications Taiwan | 671 |
| AS9264 | ASNet - Academia Sinica | 580 |
| AS33717 | Chunghwa Telecom Global, INC | 439 |
| AS55547 | - | 425 |
| AS4780 | Digital United Inc. | 400 |
| AS131660 | - | 389 |
| AS45430 | - | 365 |
| AS9304 | HGC Global Communications Limited | 339 |
| AS7478 | - | 299 |
| AS18047 | National Tsing-Hua University | 265 |
| AS17716 | National Taiwan University | 260 |
| AS18183 | National Center for Research on Earthquake Engineering | 221 |
| AS11414 | - | 158 |
| AS2856 | British Telecommunications Limited | 98 |
| AS9902 | NEOCOMISP LIMITED, IPTX Transit and Network Service Provider in Cambodia. | 92 |
| AS135140 | - | 52 |
| AS3356 | Level 3 Parent, LLC | 42 |
| AS38008 | Aperture Science Limited | 37 |
| AS18403 | - | 33 |
| AS17922 | INDOSAT Internet Network Provider | 16 |
| AS3462 | Data Communication Business Group | 10 |
| AS9507 | NextHop Pty Ltd | 10 |
| AS9680 | - | 10 |
The 30 most visible of 120.
25 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.