99558 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":62.638203,"wof:name":"99558","counts:names_total":0,"wof:placetype":"postalcode","wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081905,"locality_id":85915797,"postalcode_id":554784991,"region_id":85688573}],"mz:is_deprecated":0,"lbl:latitude":62.630995,"geom:area":0.00328,"geom:longitude":-160.217849,"wof:id":554784991,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1480825327,"wof:belongsto":[85688573,102191575,85633793,85915797,102081905],"wof:concordances":{"gp:id":"12799630"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12587579","geom:area_square_m":1.8642583130707E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-160.245609,62.60589,-160.17744,62.679766","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-160.213726,"wof:geomhash":"9593a2437101eb6201d3f2c3b363a80c","wof:parent_id":85915797,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}