Keyword | CPC | PCC | Volume | Score |
---|---|---|---|---|
when did zip codes start in usa | 0.82 | 0.7 | 1478 | 52 |
when did the usa start using zip codes | 0.02 | 1 | 4325 | 89 |
when did we start using zip codes in usa | 0.72 | 0.4 | 2496 | 55 |
when did the us start using zip codes | 1.32 | 0.4 | 7904 | 33 |
when did zip code start | 0.97 | 0.1 | 7973 | 10 |
when was zip codes introduced | 1.88 | 0.2 | 706 | 63 |
what year did zip code start | 0.61 | 0.3 | 1660 | 33 |
when were zip codes first used | 1.3 | 1 | 4577 | 96 |
when were zip codes created | 0.29 | 0.3 | 1712 | 46 |
what year were zip codes introduced | 1.85 | 0.2 | 2362 | 33 |
zip codes started in what year | 0.01 | 0.1 | 5627 | 84 |
zip codes introduced in what year | 1.6 | 0.4 | 8464 | 84 |
zip codes began in what year | 0.38 | 0.5 | 554 | 82 |