SUPPLEMENT DATED MAY 21, 2021

To the following variable annuity prospectuses:

Allianz Index Advantage^®
Allianz Index Advantage ADV^®
Allianz Index Advantage NF^®
Allianz Index Advantage Income^®
Dated April 30, 2021

ISSUED BY

Allianz Life Insurance Company of North America and Allianz Life^® Variable Account B

This supplement updates certain information contained in the prospectus and should be

attached to the prospectus and retained for future reference.

Allianz Index Advantage^® and Index Advantage Income^®

Index Performance Strategy 3-year Term with 20% Buffer available to Contracts issued before April 30, 2021

• For Contracts issued in New Hampshire that have a Contract number starting with AV, these will become available on the first Index Anniversary that occurs on or after June 21, 2021.

Index Performance Strategy 3-year and 6-year Terms with Participation Rate available to Contracts issued on or after April 30, 2021

• Not available to Contracts issued in Hawaii or Louisiana.

• For Contracts issued in New Hampshire, these first became available to newly issued Contracts on April 30, 2021.

• For Contracts issued in Montana, New Jersey, Utah, and Virginia, these will first become available to newly issued Contracts on June 21, 2021.

Allianz Index Advantage ADV^® and Index Advantage NF^®

Index Performance Strategy 3-Year Term

• For Contracts issued in New Hampshire, these become available to newly issued Contracts on April 30, 2021.

• For Contracts issued in New Hampshire before April 30, 2021, these will become available on the first Index Anniversary that occurs on or after June 21, 2021.

PRO-005-0421

(IXA-003, IXA-003-ADV, IXA-003-NF, IAI-003)