ZIP codes of the form RRRRD

In my previous post I did US ZIP codes of the forms R_w and DR_w, 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 R_wD. 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
11110	Unassigned
11112
11113
11114
11115
11116
11117
11118
11119
22220
22221
22223
22224
22225	Arlington	Virginia	in vincinity of Pentagon
22226	Arlington	Virginia	bounded by Washington Boulevard, North Monroe Street and North Fairfax drive Includes George Mason University
22227	Arlington	Virginia	between 23rd and 26th Street South and bounded by Crystal Drive and South Clark Street Includes DeVry University
22228	Unassigned		22229 formerly assigned to Arlington
22229
33330	Fort Lauderdale	Florida	between Sheridan Street, Southwest 26th Street, South Hiatus Road and southwest 148th Avenue
33331	Fort Lauderdale	Florida	west of 142nd Avenue and 148th Avenue to 185th Way
33332	Fort Lauderdale	Florida	southwest of Weston Hills Country Club
33334	Fort Lauderdale	Florida	Oakland Park region between Northeast 18th Avenue and North Andrews Avenue
33335	Fort Lauderdale	Florida	PO Boxes only
33336	Unassigned
33337	Fort Lauderdale	Florida	PO Boxes only
33338	Fort Lauderdale	Florida
33339	Fort Lauderdale	Florida
44440	Mineral Ridge	Ohio	in Mahoning and Truble Counties, part of Youngstown metropolitan area
44441	Negley	Ohio	birthplace of eccentric anarchist and pacifist Ammon Hennacy in Columbiana County on Pennsylvania border
44442	New Middletown	Ohio	in Mahoning County on Pennsylvania border; part of Youngstown metropolitan area
44443	New Springfield	Ohio	in Mahoning County
44445	New Waterford	Ohio	in Columbiana County southwest of Turnpike
44446	Niles	Ohio	in Trumbull County; part of Youngstown metropolitan area
44447	Unassigned
44448	Unassigned
44449	North Benton	Ohio	rural area of Mahoning County south of Berlin Lake and Route 62, due east of Akron.
55550	Young America	Minnesota	PO Boxes only
55551	Young America	Minnesota
55552	Young America	Minnesota
55553	Young America	Minnesota
55554	Young America	Minnesota
55556	Young America	Minnesota
55557	Young America	Minnesota
55558	Young America	Minnesota	‘Young America Corporation’ only
55559	Young America	Minnesota	PO Boxes only
66660	Unassigned
66661
66662
66663
66664
66665
66667	Topeka	Kansas	PO Boxes only
66668	Unassigned
66669
77770
77771
77772
77773
77774
77775
77776
77778
77779
88880	Unassigned		No extant ZIP codes begin with “888”
88881
88882
88883
88884
88885
88886
88887
88889
99990	Unassigned		Highest ZIP code is 99950 for Ketchikan, Alaska
99991
99992
99993
99994
99995
99996
99997
99998

This result shows that 27 of 90 R_wD 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 DR_w ZIP codes from the previous post did not.

R_wD 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.