US ABA/RTN Validation

Validate US routing transit numbers for ACH, wire, and bank routing workflows. This page follows the same clean UI as the main site while giving developers a focused validation guide.

A code can be checked before a payment is created, helping teams prevent failed transfers, manual repair work, delays, and support tickets.

For example, use 021000021:

• 0210 - Federal Reserve routing symbol
• 0002 - institution identifier
• 1 - check digit

How to validate

Start by creating an API key. Pass this key with the x-api-key HTTP header or with the api_key query parameter.

curl 'https://api.ibankdata.com/v1/rtn/021000021' \
--header 'X-Api-Key: your-api-key-here' \
--header 'Accept: application/json'

<?php
$response = file_get_contents('https://api.ibankdata.com/v1/rtn/021000021', false, stream_context_create([
'http' => ['header' => "X-Api-Key: your-api-key-here
Accept: application/json"]
]));
echo $response;

import requests

response = requests.get(
'https://api.ibankdata.com/v1/rtn/021000021',
headers={'X-Api-Key': 'your-api-key-here', 'Accept': 'application/json'}
)
print(response.json())

const response = await fetch('https://api.ibankdata.com/v1/rtn/021000021', {
headers: { 'X-Api-Key': 'your-api-key-here', 'Accept': 'application/json' }
});
console.log(await response.json());

fetch('https://api.ibankdata.com/v1/rtn/021000021', {
headers: { 'X-Api-Key': 'your-api-key-here', 'Accept': 'application/json' }
})
.then(response => response.json())
.then(console.log);

The response should be:

{
"success": true,
"data": {
"id": "021000021",
"bank": {
"name": "Example National Bank",
"code": "EXNB",
"country_id": "US"
},
"branch_name": "Main Office",
"city": { "name": "New York" },
"address": "100 Finance Avenue",
"postcode": "10001"
}
}

You can find full documentation here.