May one look up an address in a phone book on Shabbos?<a href="#_ftn1" name="_ftnref1">[1]</a>
Yes, if done for the sake of Shabbos, such as to look up an address of a host and the like.<a href="#_ftn2" name="_ftnref2">[2]</a>
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<a href="#_ftnref1" name="_ftn1">[1]</a> See Ketzos Hashulchan 107 footnote 40; Derech Sicha Yisro p. 279; SSH”K 29 footnote 117;&nbsp; Piskeiy Teshuvos 307:22 footnote 173
<a href="#_ftnref2" name="_ftn2">[2]</a> The reason: As this is similar to reading newspapers which have a need of the body.

Shulchan Aruch HaRav | May one look up an address in a phone book on Shabbos?

May one look up an address in a phone book on Shabbos?[1] Yes, if done for the sake of Shabbos, such as to look up an address of a host and the like.[2] ___________________________________ [1] See Ketzos Hashulchan 107 footnote 40; Derech Sicha Yisro p. 279; SSH”K 29 footnote 117