DOMAINS CHANGES SERVICES CERTS API

atcoder.jp

Observed 2026-06-13T08:25:38.677Z (3h ago). Every field below was attested with an Ed25519 signature at scan time.

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Ed25519 Receipt

Receipt ID
4163d6cc-c941-4e41-9dd5-a9ec0bc46560
Output Hash
dc4f7bd4512d922dcd5909bc523ceba33ccc639725675b3127e17723ee79d854
Signature
ed25519:8a7732cde197a9dbc78044134011e1d7f899318cd0076586dfaeb432f31a20aeb8c125c07ccbe714108270b78ca16895ebf31757349ceecdc263cd7dce761709
Public Key
ed25519:d3f6015a95abdad7e8166ad80938a5885500170bb75f8cdb425b8fd2772bec29
Parent
(genesis)
Plane
fast
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DNS Records

A 4

  • 13.226.209.19
  • 13.226.209.57
  • 13.226.209.113
  • 13.226.209.24

MX 7

  • {"priority":10,"exchange":"aspmx.l.google.com"}
  • {"priority":20,"exchange":"alt1.aspmx.l.google.com"}
  • {"priority":20,"exchange":"alt2.aspmx.l.google.com"}
  • {"priority":30,"exchange":"aspmx2.googlemail.com"}
  • {"priority":30,"exchange":"aspmx3.googlemail.com"}
  • {"priority":30,"exchange":"aspmx4.googlemail.com"}
  • {"priority":30,"exchange":"aspmx5.googlemail.com"}

TXT 9

  • 1password-site-verification=H3CJM364F5GI5P3VXH2PYFGCKI
  • MS=ms90685883
  • cloudflare_dashboard_sso=f62aac0af9122a7fff211950f317b6df
  • google-site-verification=IIyyB5yMWakA7SnvZLuqk-eBDlEj647aY0Rq-c80uIg
  • google-site-verification=iiXXCv8YJjdE0FWPz6zq0ispBt688ytJaOQfOpwuU3A
  • pardot884953=58ccd91e72a6f94be7450fef89ee32f712f9e18afb5273954e7d09781c220ec1
  • stripe-verification=e726551d53f6bea6b1a960e876e9fd88c34f32b723a3b2ecb1a91dfc32fa531d
  • v=spf1 a:atcoder.jp include:_spf.google.com include:aspmx.pardot.com include:amazonses.com ~all
  • v=DMARC1;p=none;rua=mailto:dmarcreports@atcoder.jp

NS 4

  • ns-1144.awsdns-15.org
  • ns-1543.awsdns-00.co.uk
  • ns-890.awsdns-47.net
  • ns-96.awsdns-12.com

SOA 1

  • {"mname":"ns-96.awsdns-12.com","rname":"awsdns-hostmaster.amazon.com","serial":1,"refresh":7200,"retry":900,"expire":1209600,"minimum":86400}

TLS Certificates (3)

Common NameIssuerExpires
atcoder.jp C=US, O=Amazon, CN=Amazon RSA 2048 M01 Fri, 16 Oct 2026 23:59:59 +0000
Amazon RSA 2048 M01 C=US, O=Amazon, CN=Amazon Root CA 1 Fri, 23 Aug 2030 22:21:28 +0000
Amazon Root CA 1 C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2 Thu, 31 Dec 2037 01:00:00 +0000

Subdomains (0)

None observed.