SSN号码是唯一的吗？

FAQ: SSN号码是唯一的吗？会不会存在两个人的SSN号码是一样的，区分在于last name.

求有经验的人告知下。

sunnyegg

不会
是unique的

ljr91-us

Just how many? Out of the 280 million Social Security numbers the firm studied across its network of databases,

* More than 20 million people have more than one number associated with their name.
* More than 40 million numbers are associated with more than one person.
* More than 100,000 Americans have 5 or more numbers associated with their name.
* More than 27,000 Social Security numbers are associated with 10 or more people.

参考链接：
http://www.dailyfinance.com/2010/08/12/your-social-security-number-may-not-be-unique-to-you/
http://www.cbsnews.com/news/for-20-million-americans-one-social-security-numbers-not-enough/

ljr91-us

小胖爱琪琪 发表于 2016-5-5 15:09
9开头的是税号，不是SSN，又一亿组号码没有了，只剩下9亿号码理论上存在
...

一直好奇credit check他们是怎么查的，只看SSN肯定是不够锁定一个人，至少也要last name感觉

ivi

dinobot

小胖爱琪琪 发表于 2016-5-5 14:09
9开头的是税号，不是SSN，又一亿组号码没有了，只剩下9亿号码理论上存在
...

”还有1936年以后开始发行ssn到现在期间过世的人。怎么说也超过10亿了吧“    你再仔细想想你的逻辑？


自己去看一下维基吧。现在只发行了4.5亿。剩下的还能用好几代人。
            ------提示：现在人口3.2亿，那么要用完3.2亿，平均要80几年（人的平均寿命）

留学生什么的，完全可以忽略不计，太小的零头了

dinobot

ljr91-us 发表于 2016-5-5 14:13
一直好奇credit check他们是怎么查的，只看SSN肯定是不够锁定一个人，至少也要last name感觉

...

够的。每个人SSN是唯一，死了也不会回收

Rorin

有，看过节目，有俩大妈离得贼远，活了半辈子才发现有另个大妈和自己用一个ssn, 所以，理论上应该人人1个号，但不排除Z*F机构的迟钝，出错会出现一个人俩号或俩人一号的情况。

天才Zebra

理论上说必须是唯一的 但是论坛里出过 被“合用”的情况
ssn和驾照号码国内身份证号码那些一样啦。。重复才有鬼

johnason91

迟点加一两个数字就能玩一辈子了。。。

杀不死的Abby

突然觉得大家都说的好有道理。。

yhj9999999

如果只是ssn的话，不会重复。但是如果把ein加进来的话就会有重复了。至少我工作的单位用税号查找一个客户的时候，是号码加类型一起搜索。
来自: iPhone客户端

dinobot 发表于 2016-5-5 15:46
够的。每个人SSN是唯一，死了也不会回收

Over 20 million Americans have more than a single social security number associated with their names.

"The majority of these cases are likely due to data entry errors which occur somewhere along the food chain of these credit applications and then they propagate in the system," according to Stephen Coggeshall, chief technology officer, ID Analytics, the consumer risk management company, which published a recent study disclosing its findings. Among other things, ID Analytics found the following:

• 6.1 percent of Americans have at least two SSNs
• More than 100,000 Americans have five or more SSNs
• More than 15 percent of SSNs are associated with two or more people
• More than 140,000 SSNs are associated with five or more people
• More than 27,000 SSNs are associated with 10 or more people