61800 is a postalcode and its consensus geometry is derived from frgov.
{"mz:is_ceased":0,"geom:latitude":48.750735,"wof:name":"61800","counts:names_total":0,"wof:placetype":"postalcode","frgov:DEP":"61","frgov:ID":"61800","frgov:_COL6":3597.6531,"mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633147,"county_id":102070283,"empire_id":136253037,"localadmin_id":404363137,"macrocounty_id":404227931,"macroregion_id":1108826393,"postalcode_id":421305047,"region_id":85683527}],"mz:is_deprecated":0,"frgov:SURF":154.6516,"geom:area":0.01897,"geom:longitude":-0.72173,"wof:id":421305047,"frgov:LIB":"Tinchebray","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1496506918,"wof:belongsto":[85683527,102191581,85633147,404363137,404227931,1108826393,136253037,102070283],"wof:concordances":{"gp:id":"12726322"},"wof:repo":"whosonfirst-data-postalcode-fr","src:geom":"frgov","wof:country":"FR","counts:names_preferred":0,"frgov:POP2010":8465,"gp:parent_id":"12597150","geom:area_square_m":1.54662474553096E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"FR","counts:names_languages":0,"geom:bbox":"-0.851774280897,48.6629424834,-0.625136113769,48.8462317516","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"3939bb8eb89e81d3a5cc9edc6d46d61a","wof:parent_id":404363137,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}