mathblog.com
Observed Aug 12, 2026, 05:33 UTC (3d ago). Every field below was attested with an Ed25519 signature at scan time.
mathblog.com is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting mathblog.com under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.
Watch mathblog.com Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Google (SPF sender)
Let's Encrypt
Forward EmailDNS Records
A 1
207.244.74.236
MX 2
10mx1.forwardemail.net20mx2.forwardemail.net
TXT 2
forward-email=i.alexandru@gmail.comv=spf1 a mx include:spf.forwardemail.net include:sendgrid.net include:_spf.google.com ~all
NS 4
ns-1113.awsdns-11.orgns-1841.awsdns-38.co.ukns-440.awsdns-55.comns-841.awsdns-41.net
SOA 1
ns-1113.awsdns-11.org awsdns-hostmaster.amazon.com
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
mathblog.com |
C=US, O=Let's Encrypt, CN=YR1 | Thu, 01 Oct 2026 09:15:21 +0000 |
YR1 |
C=US, O=ISRG, CN=Root YR | Sat, 02 Sep 2028 23:59:59 +0000 |
Root YR |
C=US, O=Internet Security Research Group, CN=ISRG Root X1 | Thu, 02 Sep 2032 23:59:59 +0000 |
Subdomains (2)
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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_86bf2b3b1a019764- Output Hash
cfaea293da03c11603373a65a019d2e8335155e7a7e6cacd27e37c9ac13df5df- Signature
ed25519:f476691e2957be739da234e1a026ed2f30e9cba309d01387afcc8ea6fffa887c76f4aa9a01755294475ab7e5d73082a72f1ce10887e774315d6755789633f606- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast