A simple service for looking up your IP address. This is the code that powers https://ifconfig.co.

Just the business, please:

$ curl ifconfig.co 127.0.0.1 $ http ifconfig.co 127.0.0.1 $ wget -qO- ifconfig.co 127.0.0.1 $ fetch -qo- https://ifconfig.co 127.0.0.1 $ bat -print=b ifconfig.co/ip 127.0.0.1 

Country and city lookup:

$ curl ifconfig.co/country Elbonia $ curl ifconfig.co/country-iso EB $ curl ifconfig.co/city Bornyasherk $ curl ifconfig.co/asn AS59795 $ curl ifconfig.co/asn-org Hosting4Real 

As JSON:

$ curl -H 'Accept: application/json' ifconfig.co # or curl ifconfig.co/json { "city": "Bornyasherk", "country": "Elbonia", "country_iso": "EB", "ip": "127.0.0.1", "ip_decimal": 2130706433, "asn": "AS59795", "asn_org": "Hosting4Real" } 

Port testing:

$ curl ifconfig.co/port/80 { "ip": "127.0.0.1", "port": 80, "reachable": false } 

Pass the appropriate flag (usually -4 and -6) to your client to switch between IPv4 and IPv6 lookup.

• Easy to remember domain name
• Fast
• Supports IPv6
• Supports HTTPS
• Supports common command-line clients (e.g. curl, httpie, ht, wget and fetch)
• JSON output
• ASN, country and city lookup using the MaxMind GeoIP database
• Port testing
• All endpoints (except /port) can return information about a custom IP address specified via ?ip= query parameter
• Open source under the BSD 3-Clause license

• To scratch an itch
• An excuse to use Go for something
• Faster than ifconfig.me and has IPv6 support

Compiling requires the Golang compiler to be installed. This package can be installed with:

go install github.com/mpolden/echoip/...@latest

For more information on building a Go project, see the official Go documentation.

A Docker image is available on Docker Hub, which can be downloaded with:

docker pull mpolden/echoip

To utilise MaxMind GeoIP/GeoLite database to enhance the information provided to end users, you can download the relevant binary databases (.mmdb format) directly from MaxMind using the above links.

Please Note: This has only been tested using the free, GeoLite database.

$ echoip -h Usage of echoip: -C int	Size of response cache. Set to 0 to disable -H value	Header to trust for remote IP, if present (e.g. X-Real-IP) -a string	Path to GeoIP ASN database -c string	Path to GeoIP city database -f string	Path to GeoIP country database -l string	Listening address (default ":8080") -p	Enable port lookup -r	Perform reverse hostname lookups -t string	Path to template directory (default "html")