diff --git a/geocoder/ip-addresses/README.md b/geocoder/ip-addresses/README.md
index af7d897..9c585d7 100644
--- a/geocoder/ip-addresses/README.md
+++ b/geocoder/ip-addresses/README.md
@@ -11,7 +11,7 @@ SELECT geocode_ip(Array['1.0.16.0', '::ffff:1.0.16.0'])
 ```
 
 # Creation steps
-1. Create the `ip_address_locations` table
+1. Create the `ip_address_locations` table (see `40_ipaddr.sql` file)
 2. Obtain the file from http://geolite.maxmind.com/download/geoip/database/GeoLite2-City-CSV.zip
 3. Uncompress it and upload the `GeoLite2-City-Blocks-IPv4.csv` file
 4. Rename the uploaded table as `latest_ip_address_locations`
diff --git a/geocoder/ip-addresses/sql/build_data_table.sql b/geocoder/ip-addresses/sql/build_data_table.sql
index ec42d0e..92b7c80 100644
--- a/geocoder/ip-addresses/sql/build_data_table.sql
+++ b/geocoder/ip-addresses/sql/build_data_table.sql
@@ -4,5 +4,23 @@
 -- Clear table
 DELETE FROM ip_address_locations;
 -- Updates table with new source data
-INSERT INTO ip_address_locations (the_geom, network_start_ip) SELECT the_geom, network_start_ip::inet FROM latest_ip_address_locations;
+INSERT INTO ip_address_locations (the_geom, network_start_ip) SELECT the_geom, ('::ffff:' || split_part(network, '/', 1))::inet FROM latest_ip_address_locations;
 DROP TABLE latest_ip_address_locations;
+
+-- Update table
+
+-- Assumptions (read https://github.com/CartoDB/data-services/tree/master/geocoder/ip-addresses#creation-steps)
+-- - latest_ip_address_locations is the GeoLite2-City-Blocks-IPv4.csv table
+-- - latest_ip6_address_locations is the GeoLite2-City-Blocks-IPv6.csv table
+-- - For option B (exported file), export from valid `ip_address_locations` table with
+--      \copy (select * from ip_address_locations) TO /tmp/ip_address_locations.dump;
+
+CREATE TABLE ip_address_locations_backup as select * from ip_address_locations;
+TRUNCATE ip_address_locations;
+
+-- OPTION A) From scratch
+INSERT INTO ip_address_locations (the_geom, network_start_ip) SELECT the_geom, ('::ffff:' || split_part(network, '/', 1))::inet FROM latest_ip_address_locations;
+INSERT INTO ip_address_locations (the_geom, network_start_ip) SELECT the_geom, split_part(network, '/', 1)::inet FROM latest_ip6_address_locations;
+
+-- OPTION B) From exported file (took 9 minutes in staging)
+\copy ip_address_locations from /tmp/ip_address_locations.dump
\ No newline at end of file