{"kind":"host","input":"portal.strava.com","report":{"host":"portal.strava.com","checkedAt":"2026-11-01T13:42:36.661Z","a":{"status":"found","values":["185.199.108.153","185.199.109.153","185.199.110.153","185.199.111.153"],"ttl":300,"via":"Cloudflare","cname":["strava.github.io"]},"aaaa":{"status":"found","values":["2606:50c0:8000::153","2606:50c0:8001::153","2606:50c0:8002::153","2606:50c0:8003::153"],"ttl":300,"via":"Cloudflare","cname":["strava.github.io"]},"verdict":"dual-stack"},"readiness":{"grade":"A","summary":"Website, mail and DNS all work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"portal.strava.com has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:50c0:8000::153","result":"answers","port":443},{"address":"2606:50c0:8001::153","result":"answers","port":443},{"address":"2606:50c0:8002::153","result":"answers","port":443},{"address":"2606:50c0:8003::153","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record."},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns-145.awsdns-18.com","ipv6":true},{"host":"ns-1461.awsdns-54.org","ipv6":true},{"host":"ns-1806.awsdns-33.co.uk","ipv6":true},{"host":"ns-610.awsdns-12.net","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to github.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://portal.strava.com/","address":"2606:50c0:8000::153","status":302,"tls":"valid"},{"url":"https://github.com/pages/auth?nonce=c29e0ce6-7fb6-4bcb-9b75-c9a45fece186&page_id=73263905&path=Lw","note":"redirects to github.com, which has no IPv6 address"}]},"receiptId":"pBYnndRrPa","reused":true,"measuredAt":"2026-11-01T13:42:36.719Z"}