Autonomous system
AS51185 MAINSTREAMING-AS
Mobile APNIC
Summary
Tesco Mobile UK
isp mobile eyeball
Tesco Mobile — a UK mobile virtual network operator (MVNO) that runs on O2's radio network but holds its own ASN for its data services.
What it's used for
- Mobile data for UK Tesco Mobile subscribers, carried over the O2 (Virgin Media O2) network.
Notable
- A consumer "eyeball" network — addresses map to mobile handsets, typically behind carrier-grade NAT.
- An MVNO: Tesco Mobile owns no radio spectrum of its own and rides O2's infrastructure, but operates its own IP network under this ASN.
Interesting
- Tesco Mobile is a joint venture between the Tesco supermarket group and O2, one of the UK's most successful MVNO brands.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 22 exchanges in 12 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.212.228 |
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.195.143 |
| LINX LON1 | London, United Kingdom | 195.66.227.90 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.210.163 |
| Neutral Internet Exchange | Amsterdam, Netherlands | 193.239.119.22 |
| France-IX Paris | Paris, France | 37.49.236.122 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.160 |
| Milan Internet Exchange | Milan, Italy | 217.29.66.66 |
Transit providers
55 upstream, 0 downstream and 76 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 6.14K addresses IPv6 19 prefixes
| Country | Name | Prefixes |
|---|---|---|
| IT | Italy | 29 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS51185- Registry name
- MAINSTREAMING-AS
- Registrant
- MAINSTREAMING-MNT
- Abuse contact
- abuse@mainstreaming.tv
- Registered
- 2010-06-16
- Last changed
- 2024-08-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 45 valid, 0 with no ROA
- ROAs
- 54 authorising AS51185
- ASPA
- no ASPA record
- IRR
- 100% registered · 45 of 45 announcements
- Route objects
- 55 naming AS51185
Reputation
Classification and threat
Mobile Cellular carrier. Addresses are shared by many handsets via CGNAT.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 432 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere