a16z.com

Observed 2026-07-15T11:11:11.988Z (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byGoogle Workspace

Registered withMarkMonitor Inc.

Also usesHubSpotStripeAtlassianZoomGoogle Search Console1Password

4 subdomains · push_legacy

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

INFRASTRUCTURE MAPwhat a16z.com actually stands on - every host below is a signed observation

a16z.com

A / AAAA

75.2.60.5

Cloudflareserves the site

ha1.markmonitor.zoneha2.markmonitor.zoneha4.markmonitor.zoneha3.markmonitor.zone

markmonitor.zoneanswers its DNS

aspmx.l.google.comalt1.aspmx.l.google.comaspmx2.googlemail.comalt2.aspmx.l.google.com+1 more

Google Workspacereceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time375 ms

DNS resolutionNOERROR

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

75.2.60.5

MX 5

10aspmx.l.google.com
20alt1.aspmx.l.google.com
40aspmx2.googlemail.com
30alt2.aspmx.l.google.com
50aspmx3.googlemail.com

TXT 33

hubspot-domain-verification=MWVlYzc1MzAtMzY4MC00MzNkLTk0NGQtOWU2Y2I3MTJiZDI2
ccisso=ccd758c0-2760-47f8-a10d-e5fc116fddae
v=spf1 include:_spf.google.com include:_spf.salesforce.com include:spf.happyfox.com include:mktomail.com include:sendgrid.net ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:199.15.214.45/32 ip4:199.15.214.46/32 ip4:199.15.214.47/32 ip4:199.15.214.48/32 ip4:199.15.214.49/32 ip4:199.15.214.50/32 ip4:199.15.214.199/32 ip4:199.15.214.201/32 ip4:199.15.214.202/32 ip4:199.15.215.77/32 ip4:199.15.215.78/32 ip4:199.15.215.79/32 ip4:199.15.215.80/32 ip4:199.15.215.81/32 ip4:199.15.215.82/32 ip4:192.254.121.248/32 ip4:148.105.12.0/24 ip4:167.89.98.146/32 ip4:167.89.89.46/32 ip4:54.149.36.89/32 ip4:44.236.219.44/32 -all
gamma-domain-verification-gp4vsa=J4Meie8RekYZa4fxKQ5kuayqy
serval-domain-verification-nadw7s=JIQXhfD5M5kFQCtvXTVU0q9Zu
elevenlabs=27i8sF6BnzYwPsZ5yq5TdjVJ000nf-OvqH4jBvfEnAQ
anthropic-domain-verification-afe4hb=TrYvFm4pI5i7OwaiQnLdjFmZi
domain-verification=1bfe2ca1d5037d223770e532e8422f430ab27da4347b03cf1c29122512653205
stripe-verification=FC0027ACED84DA245559E90AA0BE435C9D507EE24C5CF17AFD11316B98087577
a5ml0q2qredqkscjd0cnd3rs5o

NS 4

ha1.markmonitor.zone
ha2.markmonitor.zone
ha4.markmonitor.zone
ha3.markmonitor.zone

SOA 1

ha1.markmonitor.zone hostmaster.markmonitor.com

CAA 5

issue pki.goog
issue amazon.com
issue digicert.com
issue godaddy.com
issue letsencrypt.org

TLS Certificates (0)

None.

Subdomains (4)

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 a16z.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/a16z.com">
  <img src="https://domaindrift.io/badge/a16z.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for a16z.com">
</a>

Ed25519 Receipt

Receipt ID: 08de3c37-f40f-498e-a7d4-1e97ab787a90
Output Hash: 216437d1e2d3437f9d3ebf7336108783d880ce76e90ad191ffcf5ec7a9d706fa
Signature: ed25519:258a41002a330d82240d2090787b917173609b7cd35e336553e2c3d4c5326078332a19d1d565720fe119c02e5c00fcabfd2a5a96fc4b49e974008357057e2e05
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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