Mobile operator · Switzerland

Swisscom ASN, MCC/MNC and IP prefixes

Swisscom is a mobile network operator in Switzerland, part of Swiss Confederation (51% majority shareholder). It routes traffic through 5 autonomous systems (AS3303, AS6837, AS12429, AS44038, ...), which announced 391 prefixes at our last probe, and its SIMs carry MCC/MNC 228-01.

ASNs
5
Prefixes
391
Reviewed
September 2026
Country
Switzerland (CH)
Parent group
Swiss Confederation (51% majority shareholder)
ASNs
AS3303, AS6837, AS12429, AS44038, AS57370
MCC / MNC
228-01
Network generations
4G LTE, 5G
ASNs confirmed
5 of 5
Announced prefixes
391 at probe on 2026-09-06
Official site
www.swisscom.ch

Autonomous systems

Holder names and prefix counts come from the RIPE NCC's RIPEstat Data API, fetched on 2026-09-06. Role and confidence come from the evidence linked in each row; "confirmed" means a PeeringDB or RIPEstat record, or the operator's own site, names the operator.
Swisscom autonomous systems
ASNHolder (RIPEstat)RoleAnnouncedIPv4 prefixesIPv6 prefixesEvidence
AS3303SWISSCOM Swisscom (Schweiz) AGMobile networkconfirmedyes34249source · RIPEstat
AS6837SWISSCOM-BBCS-AS Swisscom (Schweiz) AGFixed-lineconfirmedno00source · RIPEstat
AS12429CYBERNET-CH Swisscom (Schweiz) AGEnterprise / transitconfirmedno00source · RIPEstat
AS44038Bluewin-AS Swisscom (Schweiz) AGFixed-lineconfirmedno00source · RIPEstat
AS57370WINGO Swisscom (Schweiz) AGPeeringDB: Wingo AGRole not documentedconfirmedno00source · RIPEstat · PeeringDB

Mobile network codes

The MCC identifies the country and the MNC identifies the operator inside it. Together they appear in the IMSI of every SIM on the network and in device diagnostics; they are how a handset knows which network it is on.
Swisscom MCC and MNC
MCC-MNCMCCMNCSource
228-0122801mcc-mnc.org/networks/228_01

About Swisscom

Swisscom is a mobile network operator in Switzerland, and the Swiss Confederation is its majority shareholder with a 51% stake. Its mobile traffic runs on AS3303, held by Swisscom (Schweiz) AG and the only one of the five recorded Swisscom ASNs announced at the last probe. The MCC/MNC code is 228-01.

The registry records five Swisscom ASNs. AS3303 carries the mobile role and is the IP-Plus backbone. AS6837, the BBCS broadband network, and AS44038, Bluewin, are marked fixed, AS12429 (Cybernet) is marked enterprise, and AS57370, the Wingo sub-brand, has no documented role. At the last probe only AS3303 was announced, originating 342 IPv4 prefixes against 49 IPv6 prefixes. PeeringDB lists AS3303 as Swisscom, also known as IP-Plus, with the type Cable/DSL/ISP, and AS57370 as Wingo AG.

An address whose origin ASN is AS3303 is routed by Swisscom, but no source in the registry separates a mobile-only Swisscom ASN from the rest of the consumer backbone, so the address could be mobile, fixed broadband or enterprise and the ASN alone does not settle it. The four other ASNs announced nothing at the last probe, so an address mapped to Bluewin, BBCS, Cybernet or Wingo needs current routing data behind it. Swisscom runs 4G LTE and 5G.

Research note. AS3303 is the only Swisscom candidate announced (RIPEstat announced=true); PeeringDB net id 5 'Swisscom' aka 'IP-Plus', type Cable/DSL/ISP, website swisscom.com; RIPE aut-num descr 'Swisscom (Switzerland) Ltd / IP-Plus Internet Backbone'. No source separates a mobile-only ASN; AS3303 is the consumer backbone. AS6837 (BBCS = broadband), AS44038 (Bluewin), AS57370 (Wingo sub-brand; PeeringDB id 10148 'Wingo AG', wingo.ch), AS12429 (Cybernet) all RIPEstat announced=false. Not fetched: 8300, 21273 (test), 30786 (Swisscom Directories), 51163, 51820/215254 (Swisscom Broadcast), 60633, 202088, 205762, 214182, 219295. Swisscom site states 99% 5G, 89% 5G+ coverage; mcc-mnc.org lists 4G+5G bands for 228-01. Confederation 51% stake: swisscom.ch shares page says 'majority shareholder holds 51%'; Wikipedia names the Swiss Confederation at 51.0%.

Check whether an IP belongs to Swisscom

Look up the origin ASN of the address and compare it with the table above. RIPEstat answers for any address, and the RADB whois mirror lists the routes registered under an ASN.
Origin ASN of an address
curl -s "https://stat.ripe.net/data/prefix-overview/data.json?resource=203.0.113.9" | jq '.data.asns'
Routes registered under AS3303
whois -h whois.radb.net -- '-i origin AS3303' | grep ^route

Questions

What is Swisscom's ASN?
The registry records five ASNs for Swisscom, and AS3303, held by Swisscom (Schweiz) AG, is the only one announced at the last probe. RIPE describes it as the IP-Plus internet backbone, and it is the ASN documented as carrying Swisscom mobile traffic.
What is the MCC/MNC of Swisscom?
Swisscom uses MCC 228 for Switzerland with MNC 01, giving the full code 228-01. That is the only pair the registry records for Swisscom, and mcc-mnc.org lists both 4G and 5G bands against it.
Is an IP from AS3303 a mobile IP?
It can be, though the ASN does not confirm it. AS3303 is the Swisscom consumer backbone and carries fixed broadband alongside mobile, and the registry has no source separating a mobile-only Swisscom ASN. Read such an address as Swisscom-routed rather than as proof of a mobile connection.

Where Swisscom meets other networks

PeeringDB records Swisscom as a participant at internet exchanges in 33 cities. Each city page lists the exchanges there and the other networks present.

Network cities in Switzerland: Zurich, Avers, Geneva, Frauenfeld, Lupfig.

Sources

Operator and registry pages used for this entry, followed by the RIPEstat Data API (holder, announced prefixes) and the PeeringDB API (network records).

  1. [1]https://www.swisscom.ch/en/about/network.html
  2. [2]https://www.swisscom.ch/en/about/investors/shares.html
  3. [3]https://en.wikipedia.org/wiki/Swisscom
  4. [4]https://mcc-mnc.org/networks/228_01
  5. [5]https://mcc-mnc.org/countries/switzerland
  6. [6]https://stat.ripe.net/data/as-overview/data.json?resource=AS3303
  7. [7]https://www.peeringdb.com/api/net?asn=3303
  8. [8]https://rest.db.ripe.net/ripe/aut-num/AS3303.json
  9. [9]https://stat.ripe.net/data/as-overview/data.json?resource=AS6837
  10. [10]https://stat.ripe.net/data/as-overview/data.json?resource=AS44038
  11. [11]https://stat.ripe.net/data/as-overview/data.json?resource=AS57370
  12. [12]https://stat.ripe.net/data/as-overview/data.json?resource=AS12429
  13. [13]https://stat.ripe.net/docs/02.data-api/
  14. [14]https://www.peeringdb.com/apidocs/

ASN and prefix data describe how the operator's networks are registered and announced. They do not identify an individual subscriber or where a device is, since carriers route traffic from many areas through shared gateways.