IFSC Code AUBL0002771 — Mahim Mumbai, AU Small Finance Bank, Ubi

Q: What is IFSC code AUBL0002771 and which branch does it identify?

IFSC code AUBL0002771 is the 11-character alphanumeric code assigned by the Reserve Bank of India to the Mahim Mumbai branch of AU Small Finance Bank in Ubi, Maharashtra. The first four characters (AUBL) identify the bank across the entire RBI NEFT network, the fifth character is always zero (0), and the last six characters (002771) identify this specific branch. No other branch in India shares this exact 11-character combination. Use AUBL0002771 for NEFT, RTGS, IMPS transfers and to link this account to UPI apps like PhonePe, Google Pay, and BHIM.

Q: How do I use IFSC AUBL0002771 to link my AU Small Finance Bank account to UPI?

To link your AU Small Finance Bank Mahim Mumbai account to UPI, open any UPI app — PhonePe, Google Pay, Paytm, or BHIM — and select "Add bank account". Choose AU Small Finance Bank from the bank list. The app will auto-detect your registered mobile number and retrieve your account. During verification, the app validates your account against IFSC AUBL0002771 in the background — you do not need to enter the code manually. Once linked, your UPI VPA (such as yourname@ausmallfinancebank) is used for daily payments. The IFSC is only needed during this initial account registration step, not for individual UPI transactions.

Q: What is the NEFT settlement time using IFSC AUBL0002771? Is RTGS faster?

NEFT transfers to Mahim Mumbai using IFSC AUBL0002771 settle in half-hourly batches — available 24 hours a day, 7 days a week including public holidays. A transfer sent at 2:10 PM is batched at 2:30 PM and credited shortly after. There is no minimum or maximum amount for NEFT. RTGS is faster but has a ₹2 lakh minimum. RTGS settles in real time during RBI operating hours (7:00 AM to 6:00 PM on working days). For transfers below ₹2 lakh that need to arrive instantly — including on weekends and bank holidays — use IMPS with IFSC AUBL0002771, which settles within seconds, 24×7, year-round.

Q: How long is the beneficiary cooling period when I add IFSC AUBL0002771 to net banking?

When you add a new beneficiary using IFSC AUBL0002771 in net banking or mobile banking, most banks enforce a cooling period of 30 minutes to 24 hours before the first transfer is permitted. During this window, the bank sends a confirmation OTP or push notification and blocks outgoing transfers to the new beneficiary. This is a fraud-prevention measure. After the cooling period, per-transaction and per-day limits apply based on your bank's policy and your account type. If you need to transfer money urgently to a AU Small Finance Bank Mahim Mumbai account, add the beneficiary at least one business day in advance. UPI payments bypass beneficiary cooling periods entirely — they can be initiated to a new UPI ID without any wait.

Q: Has AU Small Finance Bank's IFSC code changed due to a bank merger? Is AUBL0002771 still active?

Bank mergers in India can deactivate IFSC codes. When the RBI merges two banks, it typically issues new IFSC codes for the surviving entity's branches and deactivates old codes from the absorbed bank — sometimes immediately, sometimes on a scheduled date. If AU Small Finance Bank was involved in a merger, branches of the absorbed bank received new IFSC codes under the surviving bank's code prefix. IFSC AUBL0002771 is listed as active in our database as of Jun 2026. However, before initiating a large RTGS or NEFT transfer, we recommend verifying on the RBI's official IFSC lookup to confirm the code remains valid.

Q: Why does the 5th character of IFSC AUBL0002771 have to be zero (0) and not the letter O?

The 5th character of every IFSC code — including AUBL0002771 — is always the digit zero (0), not the letter O. The RBI mandated this design: position 5 is permanently reserved for future use and is always set to the numeral 0. In many printed fonts and small screens, the digit 0 and the letter O look nearly identical, but they are entirely different ASCII characters. If you type the letter O instead of 0, the payment system will reject the transfer immediately with an "invalid IFSC" error — no transfer will be processed and no money will leave your account. If a transfer to this branch fails IFSC validation, check position 5 of the code first: it must be the digit 0.

IFSC Code for Mahim Mumbai — AU Small Finance Bank

The IFSC code for Mahim Mumbai branch of AU Small Finance Bank in Ubi, Maharashtra is AUBL0002771. Use this for NEFT, RTGS, IMPS transfers and UPI account linking.

About IFSC Code AUBL0002771 — Mahim Mumbai, AU Small Finance Bank

IFSC code AUBL0002771 is the official 11-character alphanumeric identifier assigned by the Reserve Bank of India to the Mahim Mumbai branch of AU Small Finance Bank located in Ubi, Maharashtra. This code is used exclusively by India's electronic payment networks — NEFT, RTGS, IMPS, and UPI — to route digital fund transfers to the exact bank branch where the recipient's account is held. IFSC codes are not used for cheque clearing or paper-based instruments; those processes use the MICR code printed on cheque leaves. Without the correct IFSC code, no digital transfer to this branch can be processed.

How to Read IFSC Code AUBL0002771

The 11-character code AUBL0002771 is structured in three segments the RBI uses to route every NEFT and RTGS transfer: AUBL is the bank identifier — a four-letter code that identifies AU Small Finance Bank in the RBI's settlement network. 0 is the reserved zero at position 5 — always the digit 0 (never the letter O), mandated by the RBI for future use. 002771 is the branch identifier — six alphanumeric characters assigned exclusively to the Mahim Mumbai branch. No other branch in India carries this exact combination, which is what allows NEFT and RTGS systems to credit funds to one specific branch out of more than 1.6 lakh branches nationwide.

NEFT, RTGS, IMPS, and UPI — When to Use IFSC AUBL0002771

IFSC code AUBL0002771 is required every time money moves digitally to or from the Mahim Mumbai branch.

NEFT — Any Amount, Half-Hourly Batches: Settles in half-hourly batches, available 24×7. The sender enters your account number + IFSC AUBL0002771.
RTGS — Minimum ₹2 Lakh, Real-Time Settlement: Funds arrive in real time. Operates 7:00 AM to 6:00 PM on RBI working days.
IMPS — Instant Transfers, 24×7 Including Holidays: Settles within seconds. Up to ₹5 lakh per transaction using account number + IFSC.
UPI Account Linking — One-Time Registration: The app validates IFSC AUBL0002771 in the background during account setup.
Net Banking Beneficiary Registration: Add using account number + IFSC AUBL0002771. Allow 30 min–24 hour cooling period.

IFSC, MICR, and BSR Codes for Mahim Mumbai, AU Small Finance Bank

The Mahim Mumbai branch is assigned three distinct RBI codes — each used by a completely separate banking system. These codes cannot be interchanged.

IFSC AUBL0002771 — NEFT, RTGS, IMPS, and UPI account linking.
MICR 400765043 — Cheque clearing, ECS, NACH, SIP mandates. View MICR code →

Step-by-Step: How IFSC AUBL0002771 Routes a NEFT Transfer

Initiation: Sender enters account number and IFSC AUBL0002771.
Validation: Sender's bank validates the IFSC against the RBI NEFT master list.
Bank routing: AUBL identifies AU Small Finance Bank as the receiving bank.
Branch routing: 002771 routes to Mahim Mumbai specifically.
Settlement: At the next NEFT batch, RBI credits AU Small Finance Bank who credits the beneficiary account.

Common Mistakes to Avoid with IFSC AUBL0002771

Using MICR or BSR instead of IFSC — they serve completely different systems and will be rejected.
Typing letter O instead of digit 0 at position 5 — will fail IFSC validation immediately.
Using a deactivated IFSC after a bank merger — always verify before large RTGS transfers.
Using the wrong branch IFSC — funds route to the branch identified, not any branch of the same bank.
Not accounting for beneficiary cooling period — add beneficiaries at least one business day in advance.

Need this branch's MICR code? View MICR code for Mahim Mumbai →

For TDS challan filing use the BSR Code Lookup. Plan loan repayments with our EMI Calculator.

Frequently Asked Questions

What is IFSC code AUBL0002771 and which branch does it identify?

How do I use IFSC AUBL0002771 to link my AU Small Finance Bank account to UPI?

What is the NEFT settlement time using IFSC AUBL0002771? Is RTGS faster?

How long is the beneficiary cooling period when I add IFSC AUBL0002771 to net banking?

Has AU Small Finance Bank's IFSC code changed due to a bank merger? Is AUBL0002771 still active?

Why does the 5th character of IFSC AUBL0002771 have to be zero (0) and not the letter O?