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Transfer codes explained

ABA Routing Number: How to Use It for International Transfers

Last updated: 2026-10-16

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On this page
  1. What is an ABA routing number?
  2. What does one look like?
  3. Where can you find the right number?
  4. When do you need an ABA routing number—and when don’t you?
  5. How do you use it when sending with Coinepay?
  6. What if the routing number is wrong?
  7. FAQ
  8. Related guides

Sending money to a U.S. bank account from another country? You may be asked for an ABA routing number. It identifies a U.S. financial institution, but it is not the recipient’s account number—and it is not required for every international transfer. Here is how to recognize it, confirm the right number and enter it when a Coinepay Global Remittance payout calls for one.

What is an ABA routing number?

An ABA routing number, also called a routing transit number or RTN, is a nine-digit identifier for a U.S. financial institution. It helps direct checks and electronic payments to the institution responsible for receiving, paying or crediting them. The routing number identifies the institution; the recipient’s account number identifies the account within it. A bank-account payment may need both.

“ABA number” does not automatically mean “the right number for this transfer.” An institution can have more than one routing number, and its instructions may specify different numbers for ACH payments and wire transfers. The right choice depends on the recipient’s account and the payment method being used. A routing number’s existence also does not, by itself, show that the bank participates in a particular payment service.

What does one look like?

An ABA routing number contains exactly nine digits. The first four form a Federal Reserve routing symbol, the next four identify the institution, and the ninth is a check digit used in validation. It contains no letters, spaces or country prefix when entered as a number.

For a format illustration only, 0000 0000 0 shows the four-four-one grouping. It is a deliberately fictional placeholder, not a routing number to use for a payment. Do not copy an example from an article into transfer instructions. Obtain the actual number from the recipient or their bank.

On a standard U.S. paper check, the nine-digit routing number is usually in the line of numbers at the bottom left, ahead of the account number. A check may also show a differently formatted, fractional routing number near its upper right. Neither position tells you whether that check’s number is appropriate for an incoming international payment.

Where can you find the right number?

The safest starting point is the recipient’s bank instructions for the specific account and transfer type. The recipient can check their bank’s app, online banking or account documentation, or ask the bank which details to provide for the expected payment. If you are receiving money into your own U.S. account, use your bank’s instructions rather than relying solely on an old check or a search result.

  • For an ACH-style bank payment: Ask for the routing number designated for ACH or electronic payments, along with the recipient’s account number and required account-holder details.
  • For a wire: Ask the receiving bank for its incoming-wire instructions. Its wire routing number may differ from its ACH number; an international wire may call for other bank information as well.
  • If an account has moved or details are unclear: Reconfirm with the bank. A routing number can depend on where an account was opened, not where its holder lives today.

For example, Bank of America publishes different electronic-payment and wire-routing numbers for California. That is why finding a number associated with the correct bank name—or even the correct state—is not enough to establish that it suits your transfer. The ABA offers an individual routing-number lookup, while the Federal Reserve maintains separate FedACH and Fedwire participant searches. Such directories can help check an institution or payment-system listing, but the recipient bank’s account-specific instructions remain essential.

When do you need an ABA routing number—and when don’t you?

You may need an ABA routing number when funds are being deposited into a U.S. bank account through a payment route that asks for one. U.S. direct deposits and many bill payments, for instance, use ACH and require a routing number plus an account number. For a cross-border transfer, follow the details requested for the available payout method rather than assuming that every bank deposit uses the same set of codes.

You generally would not enter a U.S. ABA routing number for a payout to a mobile wallet or for cash pickup. A bank account outside the United States will ordinarily have its own applicable account and bank identifiers instead. Even when the recipient is in the United States, a form requesting different bank details should not be filled with an ABA number unless its instructions say to do so.

IdentifierWhat it identifiesWhen to check for it
ABA routing number / RTNA U.S. financial institution for an applicable payment routeWhen U.S. bank-payment instructions request a nine-digit routing number
Account numberThe recipient’s particular bank accountAlongside bank identifiers for an account deposit
SWIFT/BICA bank in an international banking messageWhen the receiving bank’s international-transfer instructions request it
IBANA bank account in countries that use the IBAN formatWhen the destination account’s instructions specify an IBAN

These identifiers are not interchangeable. In particular, a SWIFT/BIC is not a nine-digit ABA number, and neither replaces the recipient’s account details. Use the fields and instructions for the actual destination and payout method.

How do you use it when sending with Coinepay?

Coinepay Global Remittance supports cross-border transfers for individuals and businesses, with bank-account deposit, mobile-wallet and cash-pickup payout methods. To send to a U.S. bank account, sign in through the Coinepay self-service dashboard or the Coinepay mobile app, choose the available destination and payout method, and review the recipient-detail fields shown for that transfer. If the bank-deposit flow requests an ABA routing number, enter the number the recipient has confirmed for that account and payment method. Enter the account number and recipient details in their separate fields; do not put them in the routing-number field.

  1. Get instructions from the recipient. Ask them to verify their legal account-holder name, account number and the routing number appropriate for the expected deposit.
  2. Match each detail to its field. Check all nine routing digits, then independently check the account number. Do not assume a bank name appearing after entry proves the entire recipient record is correct.
  3. Review before confirming. Coinepay shows the applicable exchange rate and fees before you confirm a transfer. Check the payout details at the same time.
  4. Track the transfer. After submission, use its status tracking. If you spot a mistake, contact Coinepay support immediately rather than waiting for the status to change.

If you do not yet have access, you can register with Coinepay. Transfer availability and required details depend on the destination, payout method and applicable rules. Transfers are subject to identity verification, sanctions screening and local regulations; Coinepay may request documents explaining the payment’s purpose or source of funds. Coinepay does not serve sanctioned persons or residents of jurisdictions under comprehensive sanctions, and it does not send transfers to those jurisdictions.

What if the routing number is wrong?

A wrong number can cause a payment to be rejected, returned or delayed. A number may have nine digits yet still be invalid for the payment system or wrong for that account’s instructions. For ACH payments, return code R13 indicates that the receiving institution or gateway identifier is not a valid ACH routing number. Other problems may involve the account rather than the routing number: R03 indicates that no matching account can be located, while R04 concerns an invalid account-number structure. These are ACH codes, not promised Coinepay error messages.

More seriously, a mistyped detail can pass an initial check but direct money incorrectly. Do not rely on matching the bank name alone: verify the routing number, account number and recipient name together. If you notice an error after confirming a Coinepay transfer, contact support promptly with the transfer details. Ask what action, if any, is still possible; correction or recovery is not guaranteed once funds have been sent.

The practical rule is simple: treat an ABA routing number as one part of verified U.S. bank instructions, not as a universal international-transfer code. Confirm it for the recipient’s account and the requested payment method every time the details are uncertain.

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FAQ

Is an ABA routing number the same as an account number?

No. The nine-digit ABA routing number identifies a U.S. financial institution; the account number identifies the recipient’s account at that institution.

Can I use the routing number printed on a check for an international transfer?

Not without checking. A bank may use different routing numbers for ACH and wires. Ask the recipient’s bank which number applies to the specific account and payment method.

Do I need an ABA routing number for a mobile-wallet or cash-pickup transfer?

Generally no. Follow the recipient-detail fields for the payout method you select rather than entering U.S. bank details where they are not requested.

What should I do if I entered the wrong routing number in Coinepay?

Contact Coinepay support immediately with the transfer details. A transfer may be rejected or returned, but correction or recovery after funds are sent is not guaranteed.

Related guides

  • Purpose of Remittance Codes in India: What They Are and How to Use Them
  • SEPA Transfers: What It Is and How to Use It for Transfers
  • Intermediary and Correspondent Banks: A Transfer Guide
  • Wire Transfer vs ACH: What’s the Difference for International Transfers?
  • CNAPS Code: What It Is and How to Use It for Transfers
  • Canadian Transit and Institution Number: What It Is and How to Use It
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