| Full name | BT Group plc |
| ASN | AS2856 |
| Type | Tier-1 ISP / Telecom |
| Country | United Kingdom |
| Headquarters | London, UK |
| Founded | 1846 |
| Website | bt.com |
| Registry | RIPE |
| Total IPs | ~8 million (IPv4) |
| Upstream | Tier-1 in the UK — peers with all major European and global backbones |
| IPv6 | 2a00:23c0::/26 |
| RIR | RIPE |
| Abuse email | abuse@bt.com |
| Abuse form | Report abuse → |
AS2856 is BT Group's primary ASN — the UK's largest ISP by subscriber count and a major Tier-1 network in Europe. BT operates both consumer broadband (BT Broadband) and wholesale infrastructure (Openreach) that other ISPs lease to provide broadband services. BT also owns the EE mobile brand. The 2.2.2.2 IP address falls within BT's allocated ranges.
Every time you visit a website, your IP address — and therefore your ISP (BT Group plc) — is visible to that site. BT Group plc as your ISP can see all unencrypted traffic passing through their network, including the domains you visit. This is standard practice for all ISPs and is typically used for network management, legal compliance, and in some cases targeted advertising.
If your device is assigned an IP in BT Group plc’s ranges, websites you visit will identify your connection as coming from BT Group plc. To prevent this, a VPN replaces your ISP-assigned IP with the VPN server’s IP, making your traffic appear to come from a different provider entirely.
AS2856 is registered with RIPE — the Regional Internet Registry responsible for IP allocations in Europe, the Middle East, and Central Asia. The ASN is used to announce IP prefixes to the global BGP routing table, allowing other networks to route traffic to BT Group plc’s infrastructure.
BT Group plc peers with major transit providers and internet exchanges to ensure global reachability. BGP peering relationships determine how traffic flows between BT Group plc and the rest of the internet.
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