Postal Code Datasets used for geonames
- Andorra (AD) : Olivier Moreno
- Argentina (AR) : www.correoargentino.com.ar/
- Austria (AT) : www.post.at
- Australia (AU) : www.auspost.com.au
- Bangladesh (BD) : www.bangladeshpost.gov.bd
- Belgium (BE) : www.post.be
- Canada, FSA only (CA) : en.wikipedia.org
- Switzerland (CH) : www.post.ch
- Czech Republic (CZ) : www.cpost.cz
- Germany (DE) : sourceforge.net/projects/opengeodb
- Denmark (DK) : www.postdanmark.dk
- Spain (ES) : inmadrid.enredados.com/, www.arrakis.es/~pocha/
- Finland (FI) : www.verkkoposti.com/e3/postinumeroluettelo
- France (FR): www.unice.fr/cgi-bin/codePostal
- Croatia (HR) : www.posta.hr
- Hungary (HU) : www.posta.hu
- India (IN) : www.indiapost.gov.in
- Iceland (IS) : www.postur.is
- Italy (IT) : www.poste.it, easyreserve
- Liechtenstein (LI) : www.post.ch
- Luxembourg (LU) : www.ept.lu
- Moldova (MD) : posta.org.md, www.ungheni-labs.com
- Mexcio (MX) : www.sepomex.gob.mx
- Macedonia (MK) : www.posta.com.mk
- Monaco (MC) : Lucien Giordani
- The Netherlands (NL) : nl.wikipedia.org
- New Zealand (NZ) : www.nzpost.co.nz
- Norway (NO) : www.posten.no
- Pakistan (PK) : www.pakpost.gov.pk
- Poland (PL) : www.poczta-polska.pl
- Portugal (PT) : www.ctt.pt
- Sweden (SE) : www.pellesoft.se/upload/program/prg00745.zip
- Slovenia (SI) : www.posta.si
- Slovakia (SK) : www.slposta.sk
- San Marino (SM) : www.poste.it
- Sri Lanka (LK) : www.lacnet.org/slnews/postal_codes.html
- Thailand (TH) : www.thailandpost.com
- United Kingdom (UK) (partial): www.npemap.org.uk,www.brainstorm.co.uk, www.jibble.org,www.freethepostcode.org
- United States (US): us census
- South Africa (ZA) : www.sapo.co.za
