Mobile operator · United Kingdom

O2 ASN, MCC/MNC and IP prefixes

O2 is a mobile network operator in the United Kingdom, part of Virgin Media O2 (50:50 joint venture of Liberty Global and Telefónica SA); operating entity Telefonica UK Limited. It routes traffic through 2 autonomous systems (AS29180, AS56460), which announced 24 prefixes at our last probe, and its SIMs carry MCC/MNC 234-10, 234-11, 234-02.

ASNs
2
Prefixes
24
Reviewed
September 2026
Country
United Kingdom (GB)
Parent group
Virgin Media O2 (50:50 joint venture of Liberty Global and Telefónica SA); operating entity Telefonica UK Limited
ASNs
AS29180, AS56460
MCC / MNC
234-10, 234-11, 234-02
Network generations
4G LTE, 5G
ASNs confirmed
2 of 2
Announced prefixes
24 at probe on 2026-09-06
Official site
www.o2.co.uk

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.
O2 autonomous systems
ASNHolder (RIPEstat)RoleAnnouncedIPv4 prefixesIPv6 prefixesEvidence
AS29180O2-ONLINE-AS Telefonica UK LimitedMobile networkconfirmedyes220source · RIPEstat
AS56460O2-WIFI-AS Telefonica UK LimitedPeeringDB: O2 Wifi · Cable/DSL/ISPFixed-lineconfirmedyes20source · 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.
O2 MCC and MNC
MCC-MNCMCCMNCSource
234-1023410en.wikipedia.org/wiki/Mobile_network_codes_in_IT
234-1123411en.wikipedia.org/wiki/Mobile_network_codes_in_IT
234-0223402en.wikipedia.org/wiki/Mobile_network_codes_in_IT

About O2

O2 is a mobile network operator in the United Kingdom, run by Telefonica UK Limited under the Virgin Media O2 joint venture between Liberty Global and Telefónica SA. AS29180 is the ASN documented as carrying its mobile traffic. O2 uses MCC 234 with MNC 02, 10 and 11.

The registry lists two ASNs for O2, both held by Telefonica UK Limited. AS29180 is the mobile one, and at the last probe it announced 22 IPv4 prefixes and no IPv6 prefixes, all inside 82.132.0.0/16, the O2 UK mobile customer range. It has no PeeringDB record, so the registry rests on RIPE data for it. AS56460 announced 2 IPv4 prefixes and no IPv6; PeeringDB names it O2 Wifi with the type Cable/DSL/ISP, the public hotspot service rather than the cellular network.

An address whose origin ASN is AS29180 is routed by O2's mobile network, and the registry documents that role, so it supports a mobile classification. An address originating from AS56460 belongs to the O2 Wifi hotspot service and is not cellular. Neither ASN announces IPv6 prefixes, so an IPv6 address cannot be traced to O2 through this registry. O2 runs 4G LTE and 5G.

Research note. AS29180 O2-ONLINE-AS: RIPEstat holder Telefonica UK Limited (ORG-TOUL2-RIPE, 500 Brook Drive, Reading), whois descr 'ripe@o2.com', announcing 22 IPv4 prefixes all within 82.132.0.0/16 (O2 UK mobile customer space); no PeeringDB record exists (API returns 404 / empty), so confirmation rests on RIPEstat + RIPE org object. AS56460 O2-WIFI-AS: PeeringDB name 'O2 Wifi' (org 8588, type Cable/DSL/ISP), RIPEstat holder Telefonica UK Limited (ORG-TOUL3-RIPE), 2 prefixes - this is the O2 Wifi public hotspot service, not the cellular network; role given as fixed for lack of a better enum. Parent: news.virginmediao2.co.uk/about-us - 'We are the corporate brand of the 50:50 joint venture between Liberty Global and Telefónica SA'; o2.co.uk/5g footer '©2026 Telefonica UK Limited' and 'Virgin Media O2 Joint Venture'. MCC/MNC: 234-10 and 234-11 Operational for O2 (UK)/Telefónica with LTE and 5G bands; 234-02 Operational, used for satellite direct-to-cell on LTE band 3 (Wikipedia note) - kept since it is an O2 code. Generations: o2.co.uk/coveragechecker - 'O2 Coverage Checker - 4G, 5G, 5G+ & Satellite', 'Select a location to see 2G, 4G, 5G, 5G+ and O2 Satellite coverage'; o2.co.uk/5g - 'Our 5G network covers thousands of towns and cities across the UK and over 85% of the population'.

Check whether an IP belongs to O2

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 AS29180
whois -h whois.radb.net -- '-i origin AS29180' | grep ^route

Questions

What is O2's ASN?
The registry records AS29180, O2-ONLINE-AS, held by Telefonica UK Limited, as the ASN carrying O2 mobile traffic in the United Kingdom. A second ASN, AS56460, belongs to the same company but serves O2 Wifi, the public hotspot network, not the cellular one.
What is the MCC/MNC of O2 UK?
O2 uses mobile country code 234 with mobile network codes 10 and 11 for its cellular network. The registry also records 234-02 as an O2 code, used for satellite direct-to-cell service.
Is an IP from AS29180 a mobile IP?
AS29180 is documented as O2's mobile ASN, and its announced prefixes sit inside 82.132.0.0/16, recorded as O2 UK mobile customer space. An address originating there is routed by that mobile network, though the registry does not certify any individual address.

Where O2 meets other networks

PeeringDB records no public exchange presence for O2, which says nothing about how it reaches other networks privately. These are the United Kingdom cities where the registry does record exchange and facility capacity.

Network cities in the United Kingdom: London, Manchester, Slough, Edinburgh, Leeds.

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.o2.co.uk/5g
  2. [2]https://www.o2.co.uk/coveragechecker
  3. [3]https://news.virginmediao2.co.uk/about-us/
  4. [4]https://stat.ripe.net/data/as-overview/data.json?resource=AS29180
  5. [5]https://stat.ripe.net/data/whois/data.json?resource=AS29180
  6. [6]https://stat.ripe.net/data/announced-prefixes/data.json?resource=AS29180
  7. [7]https://rest.db.ripe.net/ripe/organisation/ORG-TOUL2-RIPE.json
  8. [8]https://www.peeringdb.com/api/net?asn=56460
  9. [9]https://stat.ripe.net/data/as-overview/data.json?resource=AS56460
  10. [10]https://en.wikipedia.org/wiki/Mobile_network_codes_in_ITU_region_2xx_(Europe)
  11. [11]https://stat.ripe.net/docs/02.data-api/
  12. [12]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.