How do I look up my IP address with curl or the API?

Getting your IP on one line with curl

Running curl ipnow.kr in a terminal prints just your current public IP on one line instead of an HTML page. curl ipnow.kr/ip returns the same single-line IP.

Both endpoints are designed to be captured directly into a variable in a script, which makes them handy for server health checks or confirming a remote server's public IP.

Getting detailed data from the JSON API

Running curl -s ipnow.kr/json returns a JSON response. If jq is installed, curl -s ipnow.kr/json | jq pretty-prints it for easier reading.

The JSON includes fields such as ip, ip_version, country_code, country, region, city, latitude, longitude, asn, isp, as_org, user_agent, browser, browser_version, os, device, is_bot, is_ai, bot_name, accept_language, protocol and time.

Forcing an IPv4 or IPv6 lookup

curl -4 ipnow.kr forces an IPv4 connection to check your IPv4 public address, while curl -6 ipnow.kr forces IPv6. If the two results differ, that device or server is running a dual-stack setup with both address families.

Looking it up in Windows PowerShell

In PowerShell, (Invoke-WebRequest ipnow.kr/ip).Content returns just the IP string, while irm ipnow.kr/json (an alias for Invoke-RestMethod) returns the JSON response already parsed into an object you can work with field by field.

Pulling your IP automatically in a script

In bash, MYIP=$(curl -s ipnow.kr/ip) stores the IP in a variable that a deployment script or firewall rule can use directly.

In JavaScript, you can call fetch("https://ipnow.kr/json").then(r => r.json()).then(data => console.log(data.ip)), and since CORS is allowed for every origin, this works from a browser without being blocked.

How do I look up my IP address with curl or the API?: step by step

1. Get just the IPRun curl ipnow.kr or curl ipnow.kr/ip in a terminal to print the public IP directly.
2. Get detailed JSONRun curl -s ipnow.kr/json, and pipe it through | jq for readable formatting if you have jq installed.
3. Force IPv4 or IPv6Use curl -4 ipnow.kr or curl -6 ipnow.kr to check only the address family you want.
4. Query it in PowerShellRun (Invoke-WebRequest ipnow.kr/ip).Content or irm ipnow.kr/json.
5. Wire it into a scriptStore it in a bash variable with $(curl -s ipnow.kr/ip), or call /json with fetch in JavaScript to pull specific fields.