CONTINUOUS INTERNET TELEMETRY24H DRIFT48,244 material changesacross 46,548 domains · 24h to ~6h ago · +13,627 vs yesterdayROTATION56 domains moved DNS from magpiedns.com to koaladns.com, 56 moved backa rotation loop, not a migration · 24hNOW536 curated domains not reachablelast probe, steadySITE ERRORS33,814 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 134,598 sites429 rate-limit / 403 bot-block, a posture signal

vcalc.com

Observed Aug 2, 2026, 21:47 UTC (3d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of vcalc.com was taken 3d ago

vcalc.com is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting vcalc.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 vcalc.com Watching a domain needs a DRM3 account. The reading above stays free and public either way.
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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
NS
dns1.stabletransit.comdns2.stabletransit.com
stabletransit.comanswers its DNS
MX
alt1.aspmx.l.google.comalt3.aspmx.l.google.comalt4.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

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

TXT 3

  • google-site-verification=o1-mizdoDCRoekmlr-0kbHuiERLCFL0WyZHi6CDkQbE
  • v=spf1 include:_spf.google.com ~all
  • google-site-verification=gdNPxAGHhgPFCZGGHZGQ4UULF8t3dsicbcZY2yXA9uk

NS 2

  • dns1.stabletransit.com
  • dns2.stabletransit.com

SOA 1

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

DMARC_RECORDS 1

  • v=DMARC1; p=reject; rua=mailto:sysadmin@vcalc.com

TLS Certificates (3)

Common NameIssuerExpires
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; the only network request the check makes is for the published public keys.

Verify this receipt

Ed25519 Receipt

Receipt ID
rcpt_46a9f223bf7457d3
Output Hash
d08575c924cd3d57ba984b01927c6be3a919e286ba7c09bf1362f9b739c20f2f
Signature
ed25519:459207edded4e794dc433121e30bd4b46d40f7dce1891ec70f679527e6c7f7d59e9e9a7e7550ad3b5243123c030c0a6879dfb51e2e4373edc1084d6d05158904
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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