Network · AS2856

AS2856 British Telecommunications PLC

AS2856 (British Telecommunications PLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS2856

OwnerBritish Telecommunications PLC
KindInternet service provider
Servers, not peopleno
IPv4 addresses13,845,504
IPv4 ranges526
IPv6 ranges5

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

86.128.0.0/10
81.128.0.0/11
109.144.0.0/12
95.144.0.0/13
31.48.0.0/13
31.112.0.0/13
31.120.0.0/14
31.100.0.0/14
217.40.0.0/14
213.120.0.0/14
147.148.0.0/14
62.6.0.0/15

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-21.

Check an IP address →

Detect it in code

Spot AS2856 traffic at signup.

Send the visitor's IP. The response includes the ASN, the owner and flags.hosting.

curl https://veqen-app.com/v1/ip/check \
  -H "Authorization: Bearer $VEQEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.7"}'

import os, requests

r = requests.post(
    "https://veqen-app.com/v1/ip/check",
    headers={"Authorization": f"Bearer {os.environ['VEQEN_API_KEY']}"},
    json={"ip": "203.0.113.7"},
    timeout=10,
)
result = r.json()
print(result["risk"]["verdict"], result["risk"]["reasons"])

const res = await fetch("https://veqen-app.com/v1/ip/check", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VEQEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"ip": "203.0.113.7"}),
});
const result = await res.json();
console.log(result.risk.verdict, result.risk.reasons);

Questions

About AS2856

Is AS2856 a datacenter or VPN network?

AS2856 (British Telecommunications PLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS2856?

AS2856 is registered to British Telecommunications PLC. It announces about 13,845,504 IPv4 addresses.

How do I detect traffic from AS2856?

Call the Veqen IP check with the visitor's address. The response includes the ASN, the owner and whether the network is a datacenter, VPN network, relay or ISP.