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Autonomous System

AS3303 · Swisscom (Schweiz) AG

Overview

AS3303 is announced on the Internet: RIPE RIS route collectors currently see 341 IPv4 prefixes and 49 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 3,515,904 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 117 upstream neighbours (transit providers or peers) and 1,148 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hivane Association (AS34019), Iway AG (AS8758), and Datasource AG (AS51395). AS3303 was assigned by RIPE NCC, and its registration country is Switzerland.

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 85.0.0.1

The trace goes to 85.0.0.1, the first address of 85.0.0.0/13. 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 (341 prefixes)

PrefixAddresses
46.14.0.0/1665,536
46.14.0.0/1732,768
46.14.128.0/1732,768
46.245.144.0/212,048
62.202.0.0/15131,072
62.202.0.0/1665,536
62.202.0.0/1732,768
62.202.128.0/1732,768
62.203.0.0/1665,536
62.203.0.0/1732,768
62.203.128.0/1732,768
78.110.128.0/204,096
80.75.192.0/204,096
80.94.144.0/204,096
81.62.0.0/15131,072
81.62.0.0/1665,536
81.63.0.0/1665,536
83.76.0.0/14262,144
83.76.0.0/15131,072
83.76.0.0/1665,536
83.77.0.0/1665,536
83.78.0.0/15131,072
83.78.0.0/1665,536
83.79.0.0/1665,536
83.173.192.0/1816,384
83.173.192.0/198,192
83.173.224.0/198,192
84.253.0.0/1816,384
84.253.0.0/198,192
84.253.32.0/198,192
85.0.0.0/13524,288
85.0.0.0/14262,144
85.0.0.0/15131,072
85.2.0.0/15131,072
85.4.0.0/14262,144
85.4.0.0/15131,072
85.6.0.0/15131,072
91.198.58.0/24256
91.198.72.0/24256
91.206.11.0/24256
91.209.158.0/24256
91.212.91.0/24256
91.212.117.0/24256
91.216.229.0/24256
91.223.121.0/24256
91.223.154.0/24256
91.226.202.0/24256
91.230.249.0/24256
92.104.0.0/14262,144
92.104.0.0/15131,072
92.104.0.0/1665,536
92.105.0.0/1665,536
92.106.0.0/15131,072
92.106.0.0/1665,536
92.107.0.0/1665,536
95.152.64.0/1816,384
95.152.64.0/198,192
95.152.96.0/198,192
109.164.128.0/1732,768
109.164.128.0/1816,384
109.164.192.0/1816,384
136.238.2.0/23512
136.238.12.0/23512
136.238.14.0/24256
138.81.0.0/1816,384
138.81.128.0/1816,384
138.187.128.0/1816,384
138.188.0.0/1665,536
138.190.0.0/1665,536
138.223.0.0/1665,536
144.2.64.0/1816,384
144.2.64.0/198,192
144.2.64.0/204,096
144.2.80.0/204,096
144.2.96.0/198,192
144.2.96.0/204,096
144.2.112.0/204,096
146.4.0.0/1665,536
146.4.0.0/1732,768
146.4.128.0/1732,768
149.133.4.0/23512
152.89.80.0/221,024
156.135.8.0/221,024
156.135.24.0/221,024
160.63.24.0/221,024
160.63.80.0/212,048
160.63.200.0/212,048
161.78.0.0/204,096
162.21.0.0/1665,536
164.128.32.0/198,192
164.128.64.0/198,192
164.128.128.0/1816,384
164.128.192.0/1816,384
170.17.128.0/1732,768
170.17.128.0/1816,384
170.17.192.0/1816,384
170.205.64.0/1816,384
170.205.64.0/198,192
170.205.96.0/198,192
176.127.0.0/1665,536

Showing the first 100 of 341, in address order. Complete list on RIPEstat

IPv6 prefixes (49 prefixes)

Prefix
2001:678:e0::/48
2001:678:d98::/48
2001:678:d9c::/48
2001:67c:420::/48
2001:67c:4f0::/48
2001:67c:5dc::/48
2001:67c:ff0::/48
2001:67c:1984::/48
2001:67c:273c::/48
2001:67c:2950::/48
2001:67c:2f70::/48
2001:918::/32
2001:918:ff44::/48
2001:918:ff64::/48
2001:918:ffa9::/48
2001:918:ffaa::/48
2001:918:ffac::/48
2001:918:ffad::/48
2001:918:ffcb::/48
2001:918:fff9::/48
2001:918:fffa::/48
2001:91a::/32
2001:91f::/32
2001:4d98::/33
2001:4d98::/34
2001:4d98:4000::/34
2a01:8b00::/32
2a01:a2e0::/32
2a02:a90::/32
2a02:1200::/27
2a02:1200::/28
2a02:1200::/29
2a02:1208::/29
2a02:1210::/28
2a02:1210::/29
2a02:1218::/29
2a02:21b0::/29
2a02:21b0::/30
2a02:21b0::/31
2a02:21b2::/31
2a02:21b4::/30
2a02:21b4::/31
2a02:21b6::/31
2a02:4620::/32
2a06:d581:3000::/36
2a07:2902:400::/38
2a0d:ed80:101::/48
2a10:a1c0::/48
2a10:a1c0:1002::/48

Neighbours

Upstreams (transit or peers) (117)

ASNetworkVisibility
AS34019Hivane Association84,759
AS8758Iway AG75,732
AS51395Datasource AG48,205
AS29222Infomaniak Network SA33,825
AS6939Hurricane Electric LLC3,977
AS12637SEEWEB s.r.l.3,171
AS2914NTT America, Inc.2,116
AS3320Deutsche Telekom AG1,826
AS3356Level 3 Parent, LLC1,571
AS3257GTT Communications Inc.1,561
AS25091IP-Max SA1,400
AS6453TATA COMMUNICATIONS (AMERICA) INC997
AS48362Stadtwerke Feldkirch985
AS12956TELEFONICA GLOBAL SOLUTIONS SL942
AS3491PCCW Global (HK) Ltd.911
AS174Cogent Communications, LLC878
AS20764CJSC RASCOM758
AS50629LWLcom GmbH668
AS8280SYNAPSECOM S.A. Provider of Telecommunications and Internet Services626
AS34177Celeste SAS613
AS15958CETIN Ltd. Belgrade580
AS577Bell Canada552
AS34549meerfarbig GmbH & Co. KG534
AS13786Seabras 1 USA, LLC521
AS33891Core-Backbone GmbH509
AS9304HGC Global Communications Limited473
AS9002RETN Limited446
AS2497Internet Initiative Japan Inc.440
AS6762TELECOM ITALIA SPARKLE S.p.A.438
AS8717A1 Bulgaria EAD433

The 30 most visible of 117.

Downstreams (customers) (1,148)

ASNetworkVisibility
AS6939Hurricane Electric LLC101,202
AS3356Level 3 Parent, LLC34,354
AS174Cogent Communications, LLC20,937
AS6453TATA COMMUNICATIONS (AMERICA) INC16,791
AS12874Fastweb SpA16,434
AS2914NTT America, Inc.15,766
AS12956TELEFONICA GLOBAL SOLUTIONS SL12,165
AS3257GTT Communications Inc.10,955
AS3491PCCW Global (HK) Ltd.5,774
AS23520Columbus Networks USA, Inc.5,223
AS16735ALGAR TELECOM S/A3,852
AS52468UFINET PANAMA S.A.2,862
AS9002RETN Limited2,857
AS4637Telstra Global2,789
AS11164Internet22,556
AS9498BHARTI Airtel Ltd.2,375
AS4134No.31,Jin-rong Street2,352
AS13786Seabras 1 USA, LLC2,215
AS3320Deutsche Telekom AG1,814
AS201054Stowarzyszenie e-Poludnie1,744
AS14840BR.Digital Telecom1,712
AS9121TTNet Turk Telekomunikasyon Anonim Sirketi1,521
AS32098Transtelco Inc1,409
AS4230CLARO S.A.1,272
AS6461Zayo Bandwidth1,227
AS577Bell Canada1,195
AS6128Cablevision Systems Corp.1,179
AS6774Belgacom International Carrier Services SA1,179
AS17676SoftBank Corp.1,153
AS18678INTERNEXA S.A. E.S.P1,093

The 30 most visible of 1,148.

246 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.