seodata.dev

keyword

united states postal service zip code plus 4

Monthly search volume and cost-per-click data for "united states postal service zip code plus 4" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=united+states+postal+service+zip+code+plus+4&country=us" +--------------+------------------+ | volume | 5,400 | | cpc | $0.01 | | competition | 0 | | country | US | | updated | 2026-05-19 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
usps zip code find 90,500 $0.62 20/20
zip4 usps 18,100 $0.12 20/20
zip code plus 4 lookup 14,800 $0 20/20
9 digit zip code lookup 8,100 $3.84 20/20
9-digit zip code lookup 8,100 $0 20/20
get 9 digit zip code 8,100 $0 20/20
plus 4 zip code 6,600 $0 20/20
zip code plus 4 6,600 $0 20/20
full zip code 9 digit 5,400 $1.57 20/20
zip code 9 digits 5,400 $1.57 20/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=united+states+postal+service+zip+code+plus+4&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt