CONTINUOUS INTERNET TELEMETRY24H DRIFT1,560 material changesacross 1,410 domains · -76 vs yesterdayDNS DRIFT16 domains changed DNS providertop destination commonmx.com · -1 vs yesterdayEMAIL DRIFT8 domains switched email providertop destination outlook.comNOW15,780 curated domains not answering+1,357 vs yesterdayERRORS8,524 responded with an errorlast probe · 5xx / 404 / TLSTHROTTLED2,335 throttled or blocked our scanner429 rate-limit / 403 bot-block24H DRIFT1,560 material changesacross 1,410 domains · -76 vs yesterdayDNS DRIFT16 domains changed DNS providertop destination commonmx.com · -1 vs yesterdayEMAIL DRIFT8 domains switched email providertop destination outlook.comNOW15,780 curated domains not answering+1,357 vs yesterdayERRORS8,524 responded with an errorlast probe · 5xx / 404 / TLSTHROTTLED2,335 throttled or blocked our scanner429 rate-limit / 403 bot-block

bt.co

Observed 2026-07-15T05:04:40.991Z (20h ago). Every field below was attested with an Ed25519 signature at scan time.

Not responding
Runs onCloudflare
Also usesGoogle Search Console
2 subdomains · tranco_5k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat bt.co actually stands on - every host below is a signed observation
bt.co
NS
ns-87.awsdns-10.comns-746.awsdns-29.netns-1450.awsdns-53.orgns-1696.awsdns-20.co.uk
awsdns-10.com + awsdns-29.net + moreanswers its DNS
MX
inbound-smtp.us-east-1.amazonaws.com
amazonaws.comreceives its email

HTTPS probe

server_error Server error (5xx) 530 Server Error
HTTP status530
Servercloudflare
TLS protocolHTTP/2
TLS issuernot observed
Behind Cloudflareyes
Response time213 ms
DNS resolutionNOERROR

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

MX 1

  • 10inbound-smtp.us-east-1.amazonaws.com

TXT 1

  • google-site-verification=dticW5prGehkdBWVl_SNS1MqC2AFRKzrzD5gtFFJHfI

NS 4

  • ns-87.awsdns-10.com
  • ns-746.awsdns-29.net
  • ns-1450.awsdns-53.org
  • ns-1696.awsdns-20.co.uk

SOA 1

  • ns-1450.awsdns-53.org awsdns-hostmaster.amazon.com

TLS Certificates (0)

None.

Subdomains (2)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for bt.co. It updates itself. It attests a signed observation - not that the site is safe.

DomainDrift signed-observation badge for bt.co <a href="https://domaindrift.io/t/bt.co"> <img src="https://domaindrift.io/badge/bt.co.svg" width="300" height="64" alt="DomainDrift signed observations for bt.co"> </a>

Ed25519 Receipt

Receipt ID
6902dd29-0608-4ae7-aae9-7c4c928472d5
Output Hash
03b0e2d1e08afe5bb9487a16ace3ab14d356eb338cb3d34dfd4838d1c8847f84
Signature
ed25519:fb00a3946ac4dfcf2022fe944e8d2fad53622cf2877f581719256b46480bf5cf231d691f85d47714de30d3a4b1208c54540b8f96e6869effe95d3925ca057502
Public Key
ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent
(genesis)
Plane
fast
Verify this in your browser