Geo::UK::Postcode - Object and class methods for working with British postcodes.


    # See Geo::UK::Postcode::Regex for parsing/matching postcodes

    use Geo::UK::Postcode;

    my $pc = Geo::UK::Postcode->new("wc1h9eb");

    $pc->raw;             # wc1h9eb - as entered
    $pc->as_string;       # WC1H 9EB - output in correct format
    "$pc";                # stringifies, same output as '->as_string'
    $pc->fixed_format;    # 8 characters, the incode always last three

    $pc->area;            # WC
    $pc->district;        # 1
    $pc->subdistrict;     # H
    $pc->sector;          # 9
    $pc->unit;            # EB

    $pc->outcode;         # WC1H
    $pc->incode;          # 9EB

    $pc->strict;          # true if matches strict regex
    $pc->valid;           # true if matches strict regex and has a valid outcode
    $pc->partial;         # true if postcode is for a district or sector only

    $pc->non_geographical;    # true if outcode is known to be
                              # non-geographical

    $pc->bfpo;                # true if postcode is for a BFPO address

    my @posttowns = $pc->posttowns;    # list of one or more 'post towns'
                                       # associated with this postcode

    # Sort Postcode objects:
    use Geo::UK::Postcode qw/ pc_sort /;

    my @sorted_pcs = sort pc_sort @unsorted_pcs;


An object to represent a British postcode.

For matching and parsing postcodes in a non-OO manner without the Moo dependency (for form validation, for example), see Geo::UK::Postcode::Regex or Geo::UK::Postcode::Regex::Simple.

For geo-location (finding latitude and longitude) see "GEO-LOCATING POSTCODES".



The exact string that the object was constructed from, without formatting.





    # or:


Stringification of postcode object, returns postcode with a single space between outcode and incode.


    my $fixed_format = $postcode->fixed_format;

Returns the full postcode in a fixed length (8 character) format, with extra padding spaces inserted as necessary.

area, district, subdistrict, sector, unit

Return the corresponding part of the postcode, undef if not present.


The first half of the postcode, before the space - comprises of the area and district.


The second half of the postcode, after the space - comprises of the sector and unit. Returns an empty string if not present.

outward, inward

Aliases for outcode and incode.


    if ($pc->valid) {

Returns true if postcode has valid outcode and matches strict regex.


    if ($pc->partial) {

Returns true if postcode is not a full postcode, either a postcode district ( e . g . AB10 ) or postcode sector (e.g. AB10 1).


    if ($pc->strict) {

Returns true if postcode matches strict regex, meaning all characters are valid ( although postcode might not exist ) .


    if ($pc->non_geographical) {

Returns true if the outcode is known to be non-geographical. Note that geographical outcodes may have non-geographical postcodes within them.

(Non-geographical postcodes are used for PO Boxes, or organisations receiving large amounts of post).


    if ($pc->bfpo) {

Returns true if postcode is mapped to a BFPO number (British Forces Post Office).


    my (@posttowns) = $postcode->posttowns;

Returns list of one or more 'post towns' that this postcode is assigned to.

Post towns are rarely used today, and are no longer required in a postal address but are included with the postcode data, so provided here.



    my @sorted_pcs = sort pc_sort @unsorted_pcs;

Exportable sort function, sorts postcode objects in a useful manner. The sort is in the following order: area, district, subdistrict, sector, unit (ascending alphabetical or numerical order as appropriate).


Postcodes can be geolocated by obtaining the Ordnance Survey 'Code-Point' data (or the free 'Code-Point Open' data).

For full details of using this class with Code-Point data, see: Geo::UK::Postcode::Manual::Geolocation.



Bugs / Feature Requests

Please report any bugs or feature requests through the issue tracker at You will be notified automatically of any progress on your issue.

Source Code

This is open source software. The code repository is available for public review and contribution under the terms of the license.

    git clone git://


Michael Jemmeson <>


Copyright 2014- Michael Jemmeson


This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.