seodata.dev

keyword

plus 4 zip code

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

$ curl "https://app.seodata.dev/v1/keyword?q=plus+4+zip+code&country=us" +--------------+------------------+ | volume | 6,600 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-20 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
zip code plus 4 lookup 14,800 $0 20/20
9 digit zip code lookup 8,100 $3.84 20/20
get 9 digit zip code 8,100 $0 20/20
9 digit zip code 6,600 $0 20/20
9-digit zip code 6,600 $0 20/20
zip code 9 digit 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
united states postal service zip code plus 4 4,400 $0.44 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=plus+4+zip+code&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