pragprog.com

Observed 2026-07-15T00:03:16.491Z (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Registered with1API GmbH

Also usesGoogle Search Console

9 subdomains · tranco_40k

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

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

pragprog.com

A / AAAA

64.23.242.214

Cloudflareserves the site

ns-1538.awsdns-00.co.ukns-275.awsdns-34.comns-960.awsdns-56.netns-1266.awsdns-30.org

awsdns-00.co.uk + awsdns-34.com + moreanswers its DNS

mx2.emailsrvr.commx1.emailsrvr.com

emailsrvr.comreceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time137 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

64.23.242.214

MX 2

20mx2.emailsrvr.com
10mx1.emailsrvr.com

TXT 5

google-site-verification=aaQupeaj2Y1RYRFl6M599QBYIuP6pCOihDLS9t0cLYY
v=DMARC1; p=quarantine; rua=mailto:ead94e32@in.mailhardener.com
v=spf1 include:spf0.pragprog.com ~all
v=DMARC1; p=quarantine; rua=mailto:ead94e32@in.mailhardener.com
v=DKIM1; (detected)

NS 4

ns-1538.awsdns-00.co.uk
ns-275.awsdns-34.com
ns-960.awsdns-56.net
ns-1266.awsdns-30.org

SOA 1

ns-960.awsdns-56.net awsdns-hostmaster.amazon.com

CAA 1

issue letsencrypt.org

TLS Certificates (0)

None.

Subdomains (9)

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

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

Ed25519 Receipt

Receipt ID: cdfb0ace-a17d-4864-8076-ae228bfd3db9
Output Hash: 056ec8e871ac832dae35c08e5da36dfc0db5dad068878701d3cbdebb89137501
Signature: ed25519:d3619f878d14b01348e8a7a8807de3ce5132be3f6573c1481426833c6a1bccfd0e6b48b4f52b934d8b90093d628e6fac79266fd8fe5d435d0f6e3580d7ffb50f
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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