The ZIP Code API
Built for Scale
40 million+ ZIP codes. Instant lookup. Distance calculation. Redis-cached for blazing-fast responses. Free tier included.
Simple. Powerful. Fast.
One API call gets you city, state, lat/lng, and timezone. Add your API key and you're live in minutes.
curl https://api.thezipcodes.com/api/v1/zipcode/10001/ \
-H "X-API-Key: tzc_your_key_here"
// Response:
{
"success": true,
"data": {
"zip_code": "10001",
"city": "New York",
"state": "NY",
"country": "US",
"latitude": 40.748817,
"longitude":-73.985428
}
}Everything you need
Two powerful endpoints. Zero friction.
ZIP Code Lookup
Instantly resolve any US ZIP code to city, state, latitude, and longitude. Indexed on 40M+ rows.
Distance Calculator
Get the exact distance between any two ZIP codes in KM and miles using the Haversine formula.
Redis Caching
Frequent lookups are served from Redis cache in under 5ms. Database queries stay lean with .only() field selection.
API Key Auth
Secure, hashed API keys per user. Pass via header or query param. Revoke anytime from the dashboard.
Usage Dashboard
Track API calls by day with a live chart. See remaining quota and upgrade your plan instantly.
Rate Limiting
Per-user monthly quotas enforced by Redis. Transparent headers tell you exactly how many calls remain.
Simple pricing
Start free. Scale as you grow.
Free
Free
Perfect for personal projects and evaluation.
- ✓ 1000 requests/month
- ✓ ZIP code lookup
- ✓ Distance calculation
- ✓ Email support
Basic
$5/mo
For growing applications and small businesses.
- ✓ 10,000 requests/month
- ✓ ZIP code lookup
- ✓ Distance calculation
- ✓ Bulk export
- ✓ Priority email support
Pro
$10/mo
Unlimited power for high-traffic applications.
- ✓ 100,000 requests/month
- ✓ ZIP code lookup
- ✓ Distance calculation
- ✓ Bulk export
- ✓ SLA guarantee
- ✓ Dedicated support
- ✓ Custom integrations
No credit card required for Free tier. Compare all features →
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