Thursday 18 September 2014

ZIP codes of the form RRRRD

In my previous post I did US ZIP codes of the forms Rw and DRw, finding that relative to the possible number they were much more common than usual, though recent work shows only one true repdigit ZIP code still in use for Newtown Falls, Ohio, as USPS has merged the two others and several other near-repdigit ZIP codes.

This post will see me do ZIP codes of the form RwD. Compared to previous repdigit and near-repdigit ZIP codes, this list is extremely easy because if any ZIP codes with the same first four digits exist, they will be in similar localities, as seen with the one extant and two recently merged repdigit ZIP codes.
ZIP Code City State Notes
11110Unassigned
11112
11113
11114
11115
11116
11117
11118
11119
22220
22221
22223
22224
22225ArlingtonVirginiain vincinity of Pentagon
22226ArlingtonVirginiabounded by Washington Boulevard, North Monroe Street and North Fairfax drive
Includes George Mason University
22227ArlingtonVirginiabetween 23rd and 26th Street South and bounded by Crystal Drive and South Clark Street
Includes DeVry University
22228Unassigned22229 formerly assigned to Arlington
22229
33330Fort LauderdaleFloridabetween Sheridan Street, Southwest 26th Street, South Hiatus Road and southwest 148th Avenue
33331Fort LauderdaleFloridawest of 142nd Avenue and 148th Avenue to 185th Way
33332Fort LauderdaleFloridasouthwest of Weston Hills Country Club
33334Fort LauderdaleFloridaOakland Park region between Northeast 18th Avenue and North Andrews Avenue
33335Fort LauderdaleFloridaPO Boxes only
33336Unassigned
33337Fort LauderdaleFloridaPO Boxes only
33338Fort LauderdaleFlorida
33339Fort LauderdaleFlorida
44440Mineral RidgeOhioin Mahoning and Truble Counties, part of Youngstown metropolitan area
44441NegleyOhiobirthplace of eccentric anarchist and pacifist Ammon Hennacy
in Columbiana County on Pennsylvania border
44442New MiddletownOhioin Mahoning County on Pennsylvania border; part of Youngstown metropolitan area
44443New SpringfieldOhioin Mahoning County
44445New WaterfordOhioin Columbiana County southwest of Turnpike
44446NilesOhioin Trumbull County; part of Youngstown metropolitan area
44447Unassigned
44448Unassigned
44449North BentonOhiorural area of Mahoning County south of Berlin Lake and Route 62, due east of Akron.
55550Young AmericaMinnesotaPO Boxes only
55551Young AmericaMinnesota
55552Young AmericaMinnesota
55553Young AmericaMinnesota
55554Young AmericaMinnesota
55556Young AmericaMinnesota
55557Young AmericaMinnesota
55558Young AmericaMinnesota‘Young America Corporation’ only
55559Young AmericaMinnesotaPO Boxes only
66660Unassigned
66661
66662
66663
66664
66665
66667TopekaKansasPO Boxes only
66668Unassigned
66669
77770
77771
77772
77773
77774
77775
77776
77778
77779
88880UnassignedNo extant ZIP codes begin with “888”
88881
88882
88883
88884
88885
88886
88887
88889
99990UnassignedHighest ZIP code is 99950 for Ketchikan, Alaska
99991
99992
99993
99994
99995
99996
99997
99998
This result shows that 27 of 90 RwD ZIP codes are in use, or exactly thirty percent. This, in fact, does suggest that the US Postal Service avoids repdigits to some extent in a manner the DRw ZIP codes from the previous post did not.

RwD ZIP codes in use are only found in five of the possible nine regions (there are no ZIP codes from ‘00000’ to ‘00499) and for street addresses in only three – mainly in Arlington, Virginia and Fort Lauderdale, Florida. The number in use could easily fall as PO Boxes are used less, too.

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