greylock.com

Observed Jul 18, 2026, 12:25 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onGoogle

Email byMimecast

Secured byLet's Encrypt

Registered withMarkMonitor Inc.

Also usesDocuSignGoogle Search ConsoleNotion

push_legacy

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

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

greylock.com

A / AAAA

216.150.1.1

Googleserves the site

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

markmonitor.zoneanswers its DNS

us-smtp-inbound-2.mimecast.comus-smtp-inbound-1.mimecast.com

Mimecastreceives its email

TLS

greylock.com

Let's Encryptissued its certificate

DNS Records

A 1

216.150.1.1

MX 2

10us-smtp-inbound-2.mimecast.com
5us-smtp-inbound-1.mimecast.com

TXT 8

apple-domain-verification=YOxBdbTu98aGJgKR
docusign=0eee69a7-e0c8-4f2e-a371-1b161973cd0c
anthropic-domain-verification-x8v6xm=g5L0TQf8WThMKKdzWyWb13xNw
google-site-verification=-jytkeyd2bnnrUL2lynZoTZUR76DIFxaUTBaje0YphU
notion-domain-verification=G1sEfl0Q3kRAnKcxwq2mL0BE5wxQNRRm713rE0UrmZF
greylock.com: xyl52tfX/mMkDLA/xj12Asdaw/3PCArsKe83IedFnt5dEgbvhzBWGXW9BH/MCk3+mrz6Li99xGNGKDKTZlvRIg==
v=spf1 include:us._netblocks.mimecast.com include:_spf.google.com include:mail.zendesk.com include:_spf.salesforce.com include:_spf.createsend.com ip4:208.117.50.199 include:sendgrid.net ~all
v=DMARC1; p=reject; rua=mailto:8uclwzgp@ag.us.dmarcian.com; ruf=mailto:8uclwzgp@fr.us.dmarcian.com; fo=1

NS 4

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

SOA 1

ha1.markmonitor.zone hostmaster.markmonitor.com

TLS Certificates (3)

Common Name	Issuer	Expires
`greylock.com`	C=US, O=Let's Encrypt, CN=YR2	Sun, 11 Oct 2026 23:53:56 +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; nothing leaves your machine.

Verify this receipt

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

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

Ed25519 Receipt

Receipt ID: ffe54c94-1673-4447-9ba3-20b2bc4d80d5
Output Hash: 7df8b7679cc19cec4ebb540a4862ab27ac813f9af265e417e57571df539da9f5
Signature: ed25519:f27f665ab50df178528855f9b82d0ba3f2ab8b8013bd901a58b057780bd20200d97e87336558bf47767ab1f4389745c6d61eaa4c26144d592f0c14a53317090d
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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