{"kind":"host","input":"usps.com","report":{"host":"usps.com","checkedAt":"2026-10-31T19:44:18.966Z","a":{"status":"found","values":["56.0.134.100"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.usps.com","a":{"status":"found","values":["23.34.125.31"],"ttl":16,"via":"Cloudflare","cname":["wildcard.usps.com.edgekey.net","e6531.dsca.akamaiedge.net"]},"aaaa":{"status":"found","values":["2600:1408:c400:38e::1983","2600:1408:c400:381::1983","2600:1408:c400:38f::1983"],"ttl":20,"via":"Cloudflare","cname":["wildcard.usps.com.edgekey.net","e6531.dsca.akamaiedge.net"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"usps.com has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.usps.com has 3 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:c400:38e::1983","result":"answers","port":443},{"address":"2600:1408:c400:381::1983","result":"answers","port":443},{"address":"2600:1408:c400:38f::1983","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mxb-0038fd02.gslb.gpphosted.com","ipv6":false},{"host":"mxa-0038fd02.gslb.gpphosted.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"n2-a8.aka-ns.net","ipv6":true},{"host":"n2-a28.aka-ns.net","ipv6":true},{"host":"n2-a22.aka-ns.net","ipv6":true},{"host":"n2-a9.aka-ns.net","ipv6":true},{"host":"n2-a13.aka-ns.net","ipv6":true},{"host":"n2-a1.aka-ns.net","ipv6":true}]}]},"receiptId":"5atMhcKgyL"}