$ query “AS3303” --type=asn → 1 result(s)

AS3303 · SWISSCOM

Swisscom (Schweiz) AG

AS3303 is operated by Swisscom (Schweiz) AG and serves as a major transit provider, registered in Switzerland since 2002. The system announces an impressive 3.5 million IPv4 addresses, including a /13, and supports IPv6. Most of its address space is geolocated to Switzerland, with additional presence in Australia and Germany, and smaller footprints in 2 additional countries. Prefix announcements for this AS were recently updated.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #87 by Reach — Top 100 by customer cone size
  • #100 by Degree — Top 100 by unique BGP neighbor count
  • #1 in Switzerland — Top 10 by reach within country

Basic Information

Country
🇨🇭 Switzerland
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
September 19, 2002
Last Changed
March 04, 2026
Last Seen
April 28, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
353 / 217
IPv6 Prefixes (raw / aggregated)
49 / 26
IPv4 Addresses
3 521 536
Largest IPv4 Prefix
/13 (524 288 addresses)
Largest IPv6 Prefix
/27
Geolocated Countries
🇨🇭 Switzerland (6 631 488 IPs), 🇦🇺 Australia (24 576 IPs), 🇩🇪 Germany (2 816 IPs) and 2 more
Prefix Changed
April 29, 2026

Reputation

Reputation
Good — 36 flagged IPs out of 3 521 536 total (0.00%)

Connectivity Summary

Upstream Providers
5 upstreams providing transit
Peers
1 294 networks exchanging traffic without transit
Downstream Customers
166 downstreams buying transit
Unclassified
12 unclassified BGP neighbors
Degree
1 477 unique BGP neighbors
Reach
37 150 networks in customer cone

Upstream Providers (5)

  • AS6939 — HURRICANE
  • AS174 — COGENT-174 (Tier-1 transit)
  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS3320 — DTAG (Tier-1 transit)
  • AS12956 — TELXIUS (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (353 total)

  • 178.192.0.0/13 (524 288 addresses (/13 prefix))
  • 85.0.0.0/13 (524 288 addresses (/13 prefix))
  • 92.104.0.0/14 (262 144 addresses (/14 prefix))
  • 188.60.0.0/14 (262 144 addresses (/14 prefix))
  • 83.76.0.0/14 (262 144 addresses (/14 prefix))
  • 81.62.0.0/15 (131 072 addresses (/15 prefix))
  • 217.192.0.0/15 (131 072 addresses (/15 prefix))
  • 62.202.0.0/15 (131 072 addresses (/15 prefix))
  • 213.3.0.0/16 (65 536 addresses (/16 prefix))
  • 146.4.0.0/16 (65 536 addresses (/16 prefix))
  • 138.188.0.0/16 (65 536 addresses (/16 prefix))
  • 194.209.0.0/16 (65 536 addresses (/16 prefix))
  • 46.14.0.0/16 (65 536 addresses (/16 prefix))
  • 195.65.0.0/16 (65 536 addresses (/16 prefix))
  • 138.190.0.0/16 (65 536 addresses (/16 prefix))
  • 176.127.0.0/16 (65 536 addresses (/16 prefix))
  • 138.223.0.0/16 (65 536 addresses (/16 prefix))
  • 212.243.0.0/16 (65 536 addresses (/16 prefix))
  • 195.186.0.0/16 (65 536 addresses (/16 prefix))
  • 162.21.0.0/16 (65 536 addresses (/16 prefix))
  • 170.17.128.0/17 (32 768 addresses (/17 prefix))
  • 164.128.128.0/17 (32 768 addresses (/17 prefix))
  • 109.164.128.0/17 (32 768 addresses (/17 prefix))
  • 144.2.64.0/18 (16 384 addresses (/18 prefix))
  • 138.81.128.0/18 (16 384 addresses (/18 prefix))
  • 213.200.192.0/18 (16 384 addresses (/18 prefix))
  • 170.205.64.0/18 (16 384 addresses (/18 prefix))
  • 178.174.0.0/18 (16 384 addresses (/18 prefix))
  • 95.152.64.0/18 (16 384 addresses (/18 prefix))
  • 84.253.0.0/18 (16 384 addresses (/18 prefix))
  • 83.173.192.0/18 (16 384 addresses (/18 prefix))
  • 138.187.128.0/18 (16 384 addresses (/18 prefix))
  • 138.81.0.0/18 (16 384 addresses (/18 prefix))
  • 164.128.32.0/19 (8 192 addresses (/19 prefix))
  • 212.90.192.0/19 (8 192 addresses (/19 prefix))
  • 193.222.64.0/19 (8 192 addresses (/19 prefix))
  • 195.144.32.0/19 (8 192 addresses (/19 prefix))
  • 195.176.128.0/19 (8 192 addresses (/19 prefix))
  • 195.176.192.0/19 (8 192 addresses (/19 prefix))
  • 212.41.192.0/19 (8 192 addresses (/19 prefix))
  • 194.6.160.0/19 (8 192 addresses (/19 prefix))
  • 178.174.64.0/19 (8 192 addresses (/19 prefix))
  • 213.180.160.0/19 (8 192 addresses (/19 prefix))
  • 212.117.96.0/19 (8 192 addresses (/19 prefix))
  • 193.223.32.0/19 (8 192 addresses (/19 prefix))
  • 164.128.64.0/19 (8 192 addresses (/19 prefix))
  • 193.222.160.0/20 (4 096 addresses (/20 prefix))
  • 78.110.128.0/20 (4 096 addresses (/20 prefix))
  • 194.38.208.0/20 (4 096 addresses (/20 prefix))
  • 193.246.32.0/20 (4 096 addresses (/20 prefix))
  • and 167 more

IPv6 Prefixes (49 total)

  • 2a02:1200::/27
  • 2a02:21b0::/29
  • 2001:91a::/32
  • 2001:918::/32
  • 2a02:4620::/32
  • 2a02:a90::/32
  • 2a01:a2e0::/32
  • 2a01:8b00::/32
  • 2001:91f::/32
  • 2001:4d98::/33
  • 2a06:d581:3000::/36
  • 2a07:2902:400::/38
  • 2001:678:d9c::/48
  • 2001:678:d98::/48
  • 2001:67c:2f70::/48
  • 2001:67c:1984::/48
  • 2001:67c:ff0::/48
  • 2001:67c:5dc::/48
  • 2001:678:e0::/48
  • 2001:67c:273c::/48
  • 2001:67c:4f0::/48
  • 2001:67c:420::/48
  • 2001:67c:2950::/48
  • 2a0d:ed80:101::/48
  • 2a10:a1c0::/48
  • 2a10:a1c0:1002::/48