Whois / DNS Peek

customsaas.co.uk

Overview

One click reveals DNS records and registration data for the current site.

One click reveals DNS records and domain registration data for the website you're currently on. Whois / DNS Peek is a small diagnostic utility for anyone who needs to inspect a domain quickly — developers debugging DNS, sysadmins checking propagation, or anyone curious about a site they've landed on. Click the toolbar icon and the popup shows: - DNS records — A, AAAA, CNAME, MX, NS, TXT — for the current tab's hostname, resolved over DNS-over-HTTPS - Registration data — registrar, creation date, last updated, expiration, status flags, and authoritative nameservers — via RDAP, the modern replacement for legacy whois - Reverse lookup (PTR) when the active tab is an IP address - Click any value to copy it, or use "Copy all" to grab the full report as plain text How it works: DNS queries go to Google's public DNS-over-HTTPS endpoint, with Cloudflare DNS as an automatic fallback if Google fails. Registration lookups go to rdap.org, the public RDAP gateway operated by ARIN, which routes the request to the correct registry per TLD. All requests are made over HTTPS, and only at the moment you click the icon. What it does not do: - No accounts, no sign-up, no settings page - No analytics, no telemetry, no usage tracking - No background activity — nothing happens until you click the icon - No content scripts injected into pages - No reading of page content, cookies, history, or anything beyond the hostname of the current tab - Nothing stored on disk — when the popup closes, everything is discarded Built on Manifest V3. Single purpose, no bloat. Open the popup, read the answer, move on.

0 out of 5
No ratings
Learn more about results and reviews.

Details

Version
0.1.0
Updated
June 2, 2026
Flag concern
Size
20.08KiB
Languages
English (United Kingdom)
Developer
Custom Saas Labs
The Bradfield Centre Cambridge CB4 0GA GB
Website
Email
hello@customsaas.co.uk
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization

The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

Support

NextDNS — Quick Tools

0.0

Manage your NextDNS DNS-filtering profile from the toolbar — allowlist, denylist, flush cache, logs, analytics & connection status.

NsLookup - Find DNS Records

1.3

A simple and powerful tool for querying DNS records

IP Tracker

5.0

One-click fast IP address finder with IP Tracker for instant IP information lookup, location insights, and quick network checks.

Domain Age Checker - Site Age Checker, Check Age of Website Online

3.3

Check age of website online with our easy-to-use Domain Age Checker. See website history and registration date in just one click.

DNS Checker Pro

5.0

DNS Info Viewer for the current website

Secure Kit

4.7

Make your browser anonymous on the web in 1 click

Squarespace DNS Exporter

5.0

Export DNS records from Squarespace domain settings to a JSON file with one click.

Clear Cache

5.0

Clear your cache and browsing data with a single click of a button.

Domo - domain name info: WHOIS, RDAP, DNS & history lookup

4.6

Super detailed info for any domain name: registration status & dates, WHOIS, RDAP, DNS records, Name Servers, and more

Country Flags & IP Whois

4.5

Displays country flag of website's server location, Whois and Geo info

Clear Current Tab Cache

0.0

One-click cache clearing for the current tab's domain only

DNS Checker - SEO and Domain Analysis

4.5

SEO and Domain Analysis Tool by DNS Checker. Provides SEO Report, Meta Redirects and 404s, Client IP, Domain IP & Geo Location, etc