支付宝上不能直接查询到完整的银行卡卡号，只能查询到银行卡后四位尾号。
可以通过给别的银行卡转账的方式，利用电子回单来查看完整卡号。
查看后四位尾号的方法如下：
1、打开支付宝首页界面后，点击右下角我的。
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2、选择里面的【银行卡】选项。
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3、所绑定的全部银行卡都在这里，四位尾号都可以看到。
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利用电子回单查看银行卡号方法如下：
1、用支付宝账号和密码或者用手机支付宝APP扫码登录到主页，单击“交易记录”。
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2、找到转账的订单，选中详情，单击“电子回单”。
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3、输入各种验证信息，然后点击“确认申请”。
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4、验证成功选择“下载电子版”。
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5、然后电子回单就下载保存到电脑文件夹里了。
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6、双击打开此份电子回单即可查看交易详情及对方的完整银行卡号了。
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