Question:

What is the limit of shaving the pubic hairs? Where are its boundaries?

Answer:

From the navel until the roots of the thighs. And where ever possible around the front and back private parts.

And Allah knows best.

(Hazrat Mufti Maulana) Yusuf Ludhyanvi As-Shaheed (May Allah have mercy on him)

Aap ke Masail aur Unka Hall Vol.3 Pg.120

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والعانة الشعر القريب من فرج الرجل والمرأة ومثلها شعر الدبر بل هو أولى بالإزالة لئلا يتعلق به شيء من الخارج عند الاستنجاء بالحجر

رد المحتار 2:481

Also see here.