Public information, by definition, is not private.
KOCHKIN, ALEKSEY was born 12 March 1985, received Social Security number 043-86-5920 (indicating Connecticut) and, Death Master File says, died 10 May 2013
Source: Death Master File (public domain). Check
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for ALEKSEY KOCHKIN. [$]
KOCHKIN, MARION was born 26 June 1925, received Social Security number 218-18-0755 (indicating Maryland) and, Death Master File says, died 6 February 1993
Source: Death Master File (public domain). Check
Archives.com
for MARION KOCHKIN. [$]
KOCHKIN, SERGEI was born 15 December 1919, received Social Security number 055-18-9123 (indicating New York) and, Death Master File says, died March 1978
Source: Death Master File (public domain). Check
Archives.com
for SERGEI KOCHKIN. [$]
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