nsidc.org

Observed 2026-07-13T12:37:22.527Z (5h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byZendesk

6 subdomains · tranco_40k

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

INFRASTRUCTURE MAPwhat nsidc.org actually stands on - every host below is a signed observation

nsidc.org

A / AAAA

128.138.135.43

Cloudflareserves the site

ns4.p201.dns.oraclecloud.netns2.p201.dns.oraclecloud.netns1.p201.dns.oraclecloud.netns3.p201.dns.oraclecloud.net

oraclecloud.netanswers its DNS

mx2-us1.ppe-hosted.commx1-us1.ppe-hosted.com

Zendeskreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://nsidc.org/home

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time441 ms

DNS resolutionNOERROR

Redirect chain

https://nsidc.org/home

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

DNS Records

A 1

128.138.135.43

MX 2

15mx2-us1.ppe-hosted.com
15mx1-us1.ppe-hosted.com

TXT 2

v=spf1 ip4:128.138.135.55 include:colorado.edu include:mail.zendesk.com -all
v=DMARC1; p=none

NS 4

ns4.p201.dns.oraclecloud.net
ns2.p201.dns.oraclecloud.net
ns1.p201.dns.oraclecloud.net
ns3.p201.dns.oraclecloud.net

SOA 1

ns1.p201.dns.oraclecloud.net hostmaster.nsidc.org

TLS Certificates (0)

None.

Subdomains (6)

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 nsidc.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: bc846317-45b3-4709-b4d7-f4051a57e8bb
Output Hash: db1971674f3b108754ee9f8b36be21a6373ff8671090c91065e3fc497f6713a9
Signature: ed25519:6aae602164f6a184a8f12c3cfd2a6f82265a0bfbdaf96b2ab95e5c0028d04f1383dd7ea9dd1e7befebe9e7a0c6a0329d881f126f4ff83df3093ee9e19b363b07
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/nsidc.org