API Number Lookup Tool
Search oil and gas well permits using the 14-digit API numbering system. Find operator details, drilling status, and production data for any well in the United States.
Search by API Number
Look up any well using its 14-digit API number (format: XX-XXX-XXXXX-XX-XX). Get operator details, drilling status, location, and production data.
Free tier: 1,000 requests/month. No credit card required.
What is an API Number?
The API number (American Petroleum Institute number) is a unique 14-digit identifier assigned to every oil and gas well drilled in the United States. This standardized numbering system ensures consistent tracking across state and county boundaries.
14-Digit Format Breakdown
SSCCCNNNNNSSEEExample: 42-329-34567-00-00
Texas (42), Midland County (329), Well #34567, Original bore (00), First completion (00)
Why Use API Number Lookup?
500,000+ Wells
Access detailed information for over half a million well permits across 27 US states.
Instant Results
Lookup API numbers in milliseconds with our optimized database and API infrastructure.
Official Sources
Data sourced directly from state oil and gas regulatory commissions and updated daily.
Complete Details
Get operator, location, permit dates, well type, formation, depth, and production data.
Batch Lookups
Submit multiple API numbers in one request for efficient bulk data retrieval.
Standardized Format
Nationwide consistency with API numbering system ensures reliable well identification.
Who Uses API Number Lookup?
Landowners & Mineral Rights Owners
Verify well details from lease documents. Track production and royalty payments using API numbers from operator statements.
Energy Analysts & Investors
Research operator portfolios, validate drilling claims, and analyze well economics using permit and production data.
Petroleum Engineers
Access technical well data including formations, depths, completion dates, and regulatory filings.
Compliance & Legal Teams
Verify regulatory compliance, check permit status, and review official well records for legal proceedings.
Access This Data via API
Look up well permit details programmatically. Query by API number, operator, location, or date range. Supports batch lookups and advanced filtering.
/v1/ei/well-permits/:api_numbercurl -X GET "https://api.oilpriceapi.com/v1/ei/well-permits/:api_number"
Sample Response
{
"status": "success",
"data": {
"well_permit": {
"api_number": "42-329-34567-00-00",
"state_code": "TX",
"state_name": "Texas",
"county": "Midland",
"operator_name": "ConocoPhillips",
"well_name": "UNIVERSITY 42-3 #1H",
"permit_date": "2026-01-10",
"permit_type": "New Drill",
"well_type": "Oil",
"latitude": 31.97,
"longitude": -102.08,
"target_formation": "Wolfcamp",
"measured_depth_ft": 21450,
"completion_date": "2026-01-28",
"status": "Active"
}
}
}Frequently Asked Questions About API Number Lookup
An API number (American Petroleum Institute number) is a unique 14-digit identifier assigned to every oil and gas well drilled in the United States. The API numbering system ensures every well can be tracked consistently across state and county boundaries. The format is: SS-CCC-NNNNN-SS-EE where SS is state code, CCC is county code, NNNNN is unique well number, SS is sidetrack code, and EE is event sequence number.
A 14-digit API number breaks down as follows: The first 2 digits identify the state (e.g., 42 = Texas). The next 3 digits identify the county within that state. The next 5 digits are a unique well number assigned sequentially. The next 2 digits indicate sidetrack or directional holes drilled from the same surface location. The final 2 digits track event sequences like completions or recompletions. Example: 42-329-34567-00-00 is a well in Texas (42), Midland County (329), well number 34567.
API numbers are public record and can be found on: state oil and gas commission websites, well permit applications, drilling completion reports, production records, mineral lease documents, and well file databases. If you know the well location, you can search geographic databases. If you know the operator name, you can filter their permits. Our tool allows you to search by API number or browse permits by location.
With an API number lookup, you can retrieve: operator name and contact, well name and location (latitude/longitude), county and state, permit date and status, well type (oil, gas, or both), target formation and depth, completion date, drilling rig information, and production history. Our API returns comprehensive well permit data including recent activity and regulatory filings.
Yes, the API numbering system is standardized nationwide. While each state assigns the numbers through their regulatory agency, the format is consistent. The first 2 digits always identify the state using the same codes everywhere. This ensures a Texas well (42-xxx-xxxxx-xx-xx) can never be confused with an Oklahoma well (40-xxx-xxxxx-xx-xx), even if they have similar county and well numbers.
Yes, our API supports batch lookups. You can submit multiple API numbers in a single request and receive detailed information for each well. This is useful for analysts tracking a portfolio of wells, landowners managing multiple properties, or researchers studying drilling patterns across regions. Free tier allows up to 1,000 requests per month.
We update well permit data from state regulatory agencies daily for major producing states (Texas, Oklahoma, New Mexico, Colorado, North Dakota, Louisiana, California) and weekly for other states. When a new well is permitted, the API number is assigned by the state and appears in our database within 24-48 hours. Production data and completion reports may take longer depending on state reporting schedules.
Yes, you can use our web-based API number lookup tool for free with no signup required. For programmatic access via our REST API, we offer a free tier with 1,000 requests per month. Paid plans start at $49/month for higher volumes, batch lookups, and advanced filtering options. All data comes from official state sources.