~/ whoami --network
Your IT Toolkit for Network & Config Verification
// the .it stands for Information Technology
Free, no-login network diagnostics for sysadmins, network engineers and developers. Look up your public IP, check email deliverability, calculate subnets, query our JSON API.
version: IPv4
// geolocation
city
Columbus
region
Ohio
country
US
continent
NA
postal
43215
timezone
America/New_York
// tools
Subnet Calculator →
CIDR, netmask, broadcast, hosts, binary — all client-side.
What Is My IP →
IPv4 vs IPv6, public vs private, NAT explained.
IP Geolocation →
Geolocate any external IP. Registered users only — coming soon.
Email Deliverability Checker →
SPF, DKIM, DMARC, reverse DNS, blacklist scoring.
// advanced lookup
[locked] ASN, organization, network range, request headers and browser fingerprint are available to registered users.
sign-up coming soon — free, no tracking.
// network tools reference guide
> CIDR & Subnet Calculators
Subnetting divides a larger network into smaller, manageable sub-networks (subnets). Our CIDR calculator performs all IP routing mathematics locally inside your browser. By inputting an IPv4 address and a prefix length (such as /24), the calculator computes the subnet mask (e.g. 255.255.255.0), the network base address, the usable host range (first and last valid host IPs), the broadcast address, and total usable hosts. It also parses IP classifications, identifying whether a network is public, private (RFC 1918), loopback, CGNAT (RFC 6598), or multicast.
> Public IP & Geolocation Lookup
Your public IP address is a unique identifier assigned by your Internet Service Provider (ISP) to route internet traffic to your local network gateway. Using request headers sent during your page load, we detect your current IPv4 or IPv6 protocol, along with geographic mapping data like your city, region, country, continent, and timezone. We also resolve the Autonomous System Number (ASN) and organization routing your network blocks.
> Email Deliverability Checks (SPF, DKIM, DMARC)
Ensuring your emails arrive safely in the recipient's inbox requires correct DNS configurations to prevent spoofing and domain abuse. SPF (Sender Policy Framework) lists the authorized sending servers for your domain. DKIM (DomainKeys Identified Mail) adds a cryptographic signature to email headers, proving the message wasn't modified in transit. DMARC (Domain-based Message Authentication) defines how receivers handle messages that fail SPF or DKIM checks, instructing them to monitor, quarantine, or reject failures. Our checker parses incoming SMTP metadata, verifying compliance, DNS records, and email server blacklist reputations.
> Programmatic JSON and Markdown APIs
For command-line developers and sysadmins, myconf.it is fully queryable via terminal utilities like curl, wget, and HTTPie. Requesting the homepage via command line returns a clean, plain text IP address. Additionally, adding the ?format=md query parameter or an Accept: text/markdown header returns complete Markdown versions of all tools, making our system exceptionally friendly for automated scripts, DevOps pipelines, and AI agents.