Free ACH Number Search Engine
We offer a free basic API.
To use the API, simply pull the following URL, replacing [ABA NUMBER] with the ABA number you are looking up:
http://abanumberlookup.com/api/lookup_aba_number/php/[ABA NUMBER]
The API will return a serialized PHP array. Use PHP's unserialize function to convert the serialized array into a normal array.
If the ABA number is found, you will get an array that looks like this:
Array
(
[query] => 121202211
[output] => php
[result] => Array
(
[routing_number] => 121202211
[office_code] => O
[servicing_frb_number] => 121000374
[record_type_code] => 1
[change_date] => 080905
[new_routing_number] => 000000000
[customer_name] => CHARLES SCHWAB BANK NA
[address] => 5190 NEIL ROAD SUITE 300
[city] => RENO
[state_code] => NV
[zipcode] => 89502-0000
[telephone] => 888-403-9000
[institution_status_code] => 1
[data_view_code] => 1
)
)
If the ABA number is not found, you will get an array that looks like this:
Array
(
[query] => 12120221
[output] => php
[error] => Array
(
[number] => 404
[message] => ABA number was not found in our database.
)
)