diff --git a/geocoder/ip-addresses/README.md b/geocoder/ip-addresses/README.md
index 5702d3c..f7ee266 100644
--- a/geocoder/ip-addresses/README.md
+++ b/geocoder/ip-addresses/README.md
@@ -5,11 +5,14 @@ IP address geocoder
 
 ### Creation steps
 
-1. upload a new dataset to the geocoder table, call it latest_ip_address_locations
+1. Upload a new dataset to the geocoder table, call it latest_ip_address_locations
 2. Run the sql/build_data_table script to update the table
 
 ### Data Sources
 
+GeoLite2 open source database [Created by MaxMind](http://www.maxmind.com) - 
+http://dev.maxmind.com/geoip/geoip2/geolite2/ Download the CSV [Geolite2 City](http://geolite.maxmind.com/download/geoip/database/GeoLite2-City-CSV.zip)
+
 ### Preparation details
 
 
diff --git a/geocoder/ip-addresses/sql/build_data_table.sql b/geocoder/ip-addresses/sql/build_data_table.sql
index dbf5dc3..93fc454 100644
--- a/geocoder/ip-addresses/sql/build_data_table.sql
+++ b/geocoder/ip-addresses/sql/build_data_table.sql
@@ -1,5 +1,5 @@
 
----- Postal Code Polygon table ---
+---- IP addresses table ---
 --- ---
 
 -- Clear table
diff --git a/geocoder/postal-codes/README.md b/geocoder/postal-codes/README.md
index dd49dc9..9b3c89e 100644
--- a/geocoder/postal-codes/README.md
+++ b/geocoder/postal-codes/README.md
@@ -3,8 +3,14 @@ Postal code geocoder (polygons)
 
 ### Function
 
+By following the next steps a table is populated with zipcodes from Australia, Canada, USA and France (identified by iso3) related with their spatial location in terms of polygons.
+
 ### Creation steps
 
+1. Import the four files attached in the section "Datasources".
+
+2. Run sql/build_data_table.sql. Notice that table "postal_code_polygons" should exist in advance with columns: _the_geom_, _adm0_a3_ and _postal_code_.
+
 ### Data Sources
 
 Australian polygons - http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/2033.0.55.0012011?OpenDocument
@@ -20,6 +26,58 @@ French polygons - http://www.data.gouv.fr/dataset/fond-de-carte-des-codes-postau
 
 ### Preparation details
 
+The names of the imported files are:
+
+- doc for Australia table
+- gfsa000a11a_e for Canada table
+- tl_2013_us_zcta510 for USA table
+- codes_postaux for France table
+
 # Postal code geocoder (points)
 
-todo
+### Function
+
+By following the next steps a table is populated with zipcodes of different countries (identified by iso3) related with their spatial location in terms of points.
+
+This dataset includes data for the following countries:
+
+````
+CH, ES, GU, ZA, MX, SJ, NL, RU, AX, TH, AR, MY, RE, LK, GB, IS, GL, JE, DK, IN,
+SI, GP, MQ, BR, SM, BG, NZ, MP, CZ, DO, MD, PK, TR, VI, BD, GG, LT, PM, MC, US,
+IT, LU, SK, LI, PR, IM, NO, PT, PL, FI, JP, CA, DE, HU, PH, SE, VA, YT, MK, FR,
+MH, RO, FO, GF, AD, HR, DZ, GT, AU, AS, BE, AT
+````
+
+### Creation steps
+
+1. Download the allCountries.zip file from [GeoNames](www.geonames.org). Import and rename the table as tmp_zipcode_points. You can follow the manual process explained below instead.
+
+
+The columns that are loaded are the following ones:
+field_1: corresponding to ISO2
+field_10: corresponds to latitude
+field_11: corresponds to longitude
+field_2: corresponds to ZIP code
+
+2. Georeference the table using field11 as longitude and field10 as latitude in order to construct the_geom.
+
+3. Add column iso3 (text) and run sql/build_zipcode_points_table.sql.
+
+
+**Alternative manual process**
+
+Open the allCountries.txt file with Excel an add a new row on top. Delete columns C-I and L.
+
+In the first row, add the following columns: iso2, zipcode, lat, long.
+
+Import the file ignoring step 2.
+
+### Data Sources
+
+All countries points [GeoNames](www.geonames.org) - http://download.geonames.org/export/zip/allCountries.zip
+
+### Preparation details
+
+_The big size of the dataset may cause interruptions in the processing of the coordinates after uploading the file, manipulating the file before importing is a faster workaround._
+
+
diff --git a/geocoder/postal-codes/sql/build_zipcode_points_table.sql b/geocoder/postal-codes/sql/build_zipcode_points_table.sql
new file mode 100644
index 0000000..30ea6db
--- /dev/null
+++ b/geocoder/postal-codes/sql/build_zipcode_points_table.sql
@@ -0,0 +1,26 @@
+
+---- Postal Code Points table ---
+
+-- Clear table
+
+DELETE FROM zipcode_points;
+
+-- Insert points
+
+DELETE FROM zipcode_points;
+
+INSERT INTO zip_code_points (the_geom, zipcode, iso3) 
+SELECT the_geom, zipcode,
+		(
+		SELECT country_decoder.iso3 FROM country_decoder 
+		WHERE tmp_zipcode_points.iso2 = country_decoder.iso2
+		)
+FROM tmp_zipcode_points
+);
+
+
+-- Drops temporary table
+
+DROP TABLE tmp_zipcode_points;
+
+