pragprog.com

Observed Jul 24, 2026, 03:39 UTC (10h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation — watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Runs onDigitalOcean

Secured byLet's Encrypt

Registered with1API GmbH

Also usesGoogle Search Console

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

DigitalOceanserves the site

ns-1266.awsdns-30.orgns-1538.awsdns-00.co.ukns-275.awsdns-34.comns-960.awsdns-56.net

awsdns-30.org + awsdns-00.co.uk + moreanswers its DNS

mx1.emailsrvr.commx2.emailsrvr.com

emailsrvr.comreceives its email

TLS

pragprog.com

Let's Encryptissued its certificate

DNS Records

A 1

64.23.242.214

MX 2

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

TXT 4

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

NS 4

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

SOA 1

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

CAA 1

issue "letsencrypt.org"

TLS Certificates (4)

Common Name	Issuer	Expires
`pragprog.com`	C=US, O=Let's Encrypt, CN=YE1	Sun, 11 Oct 2026 08:05:06 +0000
`YE1`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	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 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: rcpt_c4bc7231359a6f21
Output Hash: 9635579f08b5a49cbd5d3c898014516837c98ce796874b348604542955da26be
Signature: ed25519:37f6c2ec6b30387d2369ad4b03b21c3a6d85b150ad6b14b97b640bf66b94233ae1f0b64ab9e86033d079267c0989421760530ecdd015ad050013325e5e4d850d
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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