united states zip codes history

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
united states zip codes history	1.91	1	5050	42	31
united	1.36	0.5	1584	30	6
states	0.56	0.6	3470	75	6
zip	1.35	0.9	1021	21	3
codes	1.84	0.2	567	48	5
history	0.67	0.3	5778	33	7

Keyword	CPC	PCC	Volume	Score
history of zip codes in the united states	1.37	0.4	8407	33
year zip codes began	0.95	0.9	9615	74
year zip codes started	1.49	0.8	3855	17
when did they start zip codes	0.1	0.4	7502	73
when did zip codes start in usa	1.44	0.7	3604	3
what was the first zip code usa	1.79	1	7310	79
when zip codes began	1.37	0.2	474	97
when were zip codes started	0.79	0.7	6964	39
when were zip codes established	1.75	0.3	7834	50
what year did zip codes begin	0.88	0.6	1057	42
when did the zip code begin	1.71	0.3	2881	33
when did the zip code start	0.58	0.3	4751	92
origin zip code usa	1.4	0.5	6155	87
when was the zip code introduced	0.07	0.9	2518	92
first zip code in the us	1.58	0.6	58	1
what year was the zip code introduced	0.99	0.3	9461	61
where was the first zip code issued	0.44	0.1	4360	96
zip codes began in what year	0.05	0.9	1290	13
zip codes started in what year	0.99	1	7281	99
when did usa start using zip codes	1.06	0.5	901	81
when was the first zip code used	0.45	0.8	2543	30