sierra.com

Observed 2026-07-13T09:30:24.726Z (7h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byProofpoint

Registered withMarkMonitor Inc.

Also usesGoogle Search Console

IPv6 · 4 subdomains · tranco_40k

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

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

sierra.com

A / AAAA

23.216.149.14523.216.149.1472600:1406:2e00:28::17cb:a60f2600:1406:2e00:28::17cb:a62f

Cloudflareserves the site

a5-65.akam.neta1-117.akam.neta18-67.akam.neta14-66.akam.net+2 more

akam.netanswers its DNS

mx0a-00081a02.pphosted.commxa-00081a02.gslb.pphosted.commx0b-00081a02.pphosted.commxb-00081a02.gslb.pphosted.com

Proofpointreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.sierra.com/

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time178 ms

DNS resolutionNOERROR

Redirect chain

https://www.sierra.com/

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

DNS Records

A 2

23.216.149.145
23.216.149.147

AAAA 2

2600:1406:2e00:28::17cb:a60f
2600:1406:2e00:28::17cb:a62f

MX 4

20mx0a-00081a02.pphosted.com
10mxa-00081a02.gslb.pphosted.com
20mx0b-00081a02.pphosted.com
10mxb-00081a02.gslb.pphosted.com

TXT 6

yahoo-verification-key=YsGxRHqFSre2qGQ8PmxHnXX0wxSjrjT28BMBnJJHLFE=
_3lnpisy0k1vhbs5c2wgv5j6edfwa9cd
_kbjv48zzq25pmo06y45ibslm7qrplaf
v=spf1 ip4:205.220.171.102 ip4:205.220.182.205 ip4:205.220.173.171 ip4:205.220.161.171 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
google-site-verification=6fDczSvMJO9oJmJNVn12LSPzijhyTUHTlEMSfmHb1r4
v=DMARC1; p=reject; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com; fo=1;

NS 6

a5-65.akam.net
a1-117.akam.net
a18-67.akam.net
a14-66.akam.net
a22-64.akam.net
a7-66.akam.net

SOA 1

a1-117.akam.net hostmaster.sierra.com

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

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

Ed25519 Receipt

Receipt ID: 1224ecce-b572-4058-a608-48d01b44d64c
Output Hash: d9400aa057de3dc2d7fae96b12a082f6d8c3b844f792060eeef5bb79b45d67b5
Signature: ed25519:71b4267dcfd5674e680e0ddd6658c8cf6b76e0cd0d9eed29db4cc27b30ba36fda0e99d1108ca9d858793f0b631836f915ea6ac70e148dbbc849527be67ffb308
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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