regex101.com

Observed 2026-07-17T13:47:42.984490378+00:00 (19h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onHetzner Online

Email byGoogle Workspace

Secured byLet's Encrypt

Registered withNameCheap, 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 regex101.com actually stands on - every host below is a signed observation

regex101.com

A / AAAA

78.47.220.1952a01:4f8:1c1c:13a4::1

Hetzner Onlineserves the site

dns1.registrar-servers.comdns2.registrar-servers.com

registrar-servers.comanswers its DNS

smtp.google.com

Google Workspacereceives its email

TLS

regex101.com

Let's Encryptissued its certificate

DNS Records

A 1

78.47.220.195

AAAA 1

2a01:4f8:1c1c:13a4::1

MX 1

1smtp.google.com

TXT 1

google-site-verification=e3kdGikhQf2oBB_SquqmSxSnG-lMK1_3i2dGXNBZprA

NS 2

dns1.registrar-servers.com
dns2.registrar-servers.com

SOA 1

dns1.registrar-servers.com hostmaster.registrar-servers.com

TLS Certificates (4)

Common Name	Issuer	Expires
`regex101.com`	C=US, O=Let's Encrypt, CN=YE1	Wed, 23 Sep 2026 23:35:38 +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 (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 regex101.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/regex101.com">
  <img src="https://domaindrift.io/badge/regex101.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for regex101.com">
</a>

Ed25519 Receipt

Receipt ID: 609fbbc8-e9cb-411a-a25a-52fd06428dbe
Output Hash: 84768d9dd30a0f6e44315b308e035b794d97359d534e0363885d810d1dc1f69b
Signature: ed25519:f7b8cfc9efcbd08cf4809cad8b30b2ebda04fe90dccb2741a37942a7bf7dd9551a2ce9d07b3a017acde98f2ce6bcf6d92a5f7a7456fc9b46380bee995793970a
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/regex101.com