28800 is a postalcode and its consensus geometry is derived from figov.
{"mz:is_ceased":0,"geom:latitude":61.552238,"figov:nimi":"Pihlava","wof:name":"28800","counts:names_total":0,"wof:placetype":"postalcode","wof:hierarchy":[{"continent_id":102191581,"country_id":85633143,"macroregion_id":404227405,"postalcode_id":421474769,"region_id":85683095}],"mz:is_deprecated":0,"lbl:latitude":61.555787,"geom:area":0.003751,"geom:longitude":21.581974,"wof:id":421474769,"counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1469577639,"wof:belongsto":[102191581,85633143,85683095,404227405],"wof:concordances":{"gp:id":"12828877"},"wof:repo":"whosonfirst-data-postalcode-fi","src:geom":"figov","wof:country":"FI","counts:names_preferred":0,"gp:parent_id":"571609","wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"FI","counts:names_languages":0,"geom:bbox":"21.5230621012,61.5294893839,21.6570614627,61.5817099788","src:lbl:centroid":"mapshaper","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":21.581955,"wof:geomhash":"0aa20ba0ae6cd814d4d0dc543b6c3c90","wof:parent_id":85683095,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}