IP Timezone, now free: the IANA timezone of every IP range

IP Timezone is now one of our Open databases: free to download with any account under CC BY-SA 4.0. It's every IPv4 and IPv6 range with its IANA timezone and its country, the zone of the city IP Geolocation places it in, with neighbors in the same zone merged into one row.

One zone per range

A zone is its IANA name, so the offset on any date, summer time included, comes from the tz database your language already ships.

What's in it

The October 16 build holds 2,454,960 ranges, 1,740,662 IPv4 and 714,298 IPv6, in 400 IANA timezones and 248 countries and territories. They cover 3,702,256,205 IPv4 addresses, all of IP Geolocation's but 1,458 in Bouvet Island and Heard Island. Ranges in the United States fall in 28 zones, in Russia 23, in Canada 20 and in Brazil 15.

IP Country, free too, carries the same zone beside the range's continent and country and the country's currency and flag.

Getting access

Sign up, and IP Timezone is in the console with a download button, already licensed to your organization: nothing to request. With an API key, the CLI and the client libraries download it as they do any database:

internetdata db download ip_timezone_v1

In BigQuery, subscribe to the free InternetData Open listing, or InternetData Open EU, and look addresses up inline (BigQuery has the details):

SELECT
    l.ip,
    l.created_at,
    internetdata_open.ip_timezone_v1(l.ip).timezone AS timezone
FROM mydataset.logins AS l

CC BY-SA 4.0 asks two things: credit InternetData with a link to internetdata.io, and share what you build from the data under the same license. Building it into something you sell without sharing alike takes a redistribution license. Its docs page has the schema.