rtwboston.org
Observed Aug 16, 2026, 08:42 UTC (12h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.
Up right now
Email byGoogle Workspace
Google WorkspaceSecured byLet's Encrypt
Let's EncryptRegistered withInternet Domain Service BS Corp
domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat rtwboston.org actually stands on - every host below is a signed observation
rtwboston.org
A / AAAA
35.212.56.225
unattributedserves the site
NS
ns1.siteground.netns2.siteground.net
siteground.netanswers its DNS
MX
alt3.aspmx.l.google.comalt2.aspmx.l.google.comalt1.aspmx.l.google.comaspmx.l.google.com+1 more
Google Workspacereceives its email
TLS
*.rtwboston.org
Let's Encryptissued its certificate
DNS Records
A 1
35.212.56.225
MX 5
10alt3.aspmx.l.google.com5alt2.aspmx.l.google.com5alt1.aspmx.l.google.com1aspmx.l.google.com10alt4.aspmx.l.google.com
TXT 1
v=spf1 +a +mx +ip4:35.212.94.247 include:rtwboston.org.spf.auto.dnssmarthost.net ~all
NS 2
ns1.siteground.netns2.siteground.net
SOA 1
ns1.siteground.net admins.siteground.com
DMARC_RECORDS 1
v=DMARC1; p=none; aspf=r; adkim=r;
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
*.rtwboston.org |
C=US, O=Let's Encrypt, CN=YR2 | Mon, 26 Oct 2026 04:59:05 +0000 |
YR2 |
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 (0)
None observed.
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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_adac413bd785f7cd- Output Hash
e8d17f9576bb30050c76bf3d9db4f4f639ab0eb8132e0d8e1f2f03222a6edf67- Signature
ed25519:41d5d6e417ed77b79a6e379daf98bd850befad7401e581afddd3be3f6e2f69125421897fc504cbef3ee1c22f011be9b03f94f29403e6f106d9637ea0a35d2d0c- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast