vcalc.com

Observed Jul 27, 2026, 18:42 UTC (6d 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.

Verify this receipt yourself + Watch this domain

Up right now

Email byGoogle Workspace

Secured byLet's Encrypt

Also usesGoogle Search Console

2 subdomains · tranco

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat vcalc.com actually stands on - every host below is a signed observation

vcalc.com

A / AAAA

146.20.60.138

unattributedserves the site

dns1.stabletransit.comdns2.stabletransit.com

stabletransit.comanswers its DNS

alt3.aspmx.l.google.comalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

www.vcalc.com

Let's Encryptissued its certificate

DNS Records

A 1

146.20.60.138

MX 5

10alt3.aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com
1aspmx.l.google.com
10alt4.aspmx.l.google.com

TXT 4

google-site-verification=gdNPxAGHhgPFCZGGHZGQ4UULF8t3dsicbcZY2yXA9uk
google-site-verification=o1-mizdoDCRoekmlr-0kbHuiERLCFL0WyZHi6CDkQbE
v=spf1 include:_spf.google.com ~all
v=DMARC1; p=reject; rua=mailto:sysadmin@vcalc.com

NS 2

dns1.stabletransit.com
dns2.stabletransit.com

SOA 1

ns.rackspace.com adam.siegel.vcalc.com

TLS Certificates (3)

Common Name	Issuer	Expires
`www.vcalc.com`	C=US, O=Let's Encrypt, CN=YR1	Wed, 14 Oct 2026 11:39:53 +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)

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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for vcalc.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/vcalc.com">
  <img src="https://domaindrift.io/badge/vcalc.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for vcalc.com">
</a>

Ed25519 Receipt

Receipt ID: rcpt_a7d75e65a717d264
Output Hash: 87946e204f03312fd83e4fceb35a7926a9f223a801d04ef5def26ed6458b09cf
Signature: ed25519:4f9b3c3f89863f4f9f4f8877289c8b47a2ffa3b09fa0831620e37dab703f75bec15df192322b896346914c5e6947d738c968a0535a100b2393b291eea08e420b
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/vcalc.com