Icanhazip: A simple IP address tool survived a deluge of users (2021)

• myip

  7 39 3.7 Makefile

  Get your external IP address using multiple STUN servers

Why not use protocols which are purposely designed to report mapped IP address like STUN? It's faster as UDP exchange is shorter than 3-way TCP handshake (or even TCP+TLS handshake).

Here is an implementation which uses parallel STUN queries to report address reliably as fast as possible: https://github.com/Snawoot/myip

• cli

  262 1,641 9.3 Go

  Official Command Line Interface for the IPinfo API (IP geolocation and other types of IP data) (by ipinfo)

  

Note that if you leave off the `@service.authoritative.nameserver` portion of all of the above, you get the IP address of the recursive resolver that your machine is configured to use. If you pass this to a service like https://ipinfo.io/, you can use this to figure out what company's DNS service is currently configured, be it your ISPs, or an internet company like Cloudflare/Google/Quad9.

Arguably, that is the only valid reason to be using an IP address echoer via DNS, as if you truly wanted your own IP, you could fetch it far easier from a service like icanhazip.com.

Personally, Akamai's offering is by far the most useful and convenient--it's an A record, so you won't accidentally forget to add "txt" to your dig invocation, and has a very easy to remember name. Google's works too, though it requires remembering the strange domain name. Cloudflare tries to be cute and uses the Chaosnet DNS class, which while being an incredibly cool reference to internet history, unfortunately is not propagated by most public recursive resolvers. OpenDNS simply does not seem to work for me over IPv4, only returning IPv6 responses, and somehow still blocks requests that pass through a recursive resolver.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• dns.toys

  29 2,435 4.7 Go

  A DNS server that offers useful utilities and services over the DNS protocol. Weather, world time, unit conversion etc.

In addition to the others, there is also https://www.dns.toys/

• echoip

  4 3,909 0.0 Go

  IP address lookup service

great callout! A more advanced self hosted option can be https://github.com/mpolden/echoip

Suggest a related project