whois-available returns whois information and checks whether domains are available
npm install whois-available
whoisAvailable = require 'whois-available'
whoisAvailable 'google.com', (err, whoisResponse, isAvailable) -> # ...ac, ae, aero, af, ag, ai, am, arpa, as, asia, at, au, ax, be, bg, bi, biz, bj, br, by, ca, cat, cc, ch, cl, cn, co, com, coop, cx, cz, de, dk, dm, ec, edu, ee, eu, fi, fo, fr, gd, gg, gi, gl, gov, gs, gy, hk, hn, hr, ht, hu, ie, il, im, in, info, int, io, iq, ir, is, it, je, jobs, jp, ke, kg, ki, kr, kz, la, li, lt, lu, lv, ma, md, me, mo, mobi, ms, mu, museum, mx, my, na, name, nc, net, ng, nl, no, nu, nz, om, org, pe, pl, pm, post, pr, pro, pt, pw, qa, re, ro, rs, ru, sa, sb, se, sg, sh, si, sk, sm, so, st, sx, sy, tc, tel, tf, th, tk, tl, tm, tn, to, tr, travel, tv, tz, ua, ug, uk, us, uy, uz, ve, wf, ws, xn--fiqs8s, xn--fiqz9s, xn--mgbaam7a8h, xn--ygbi2ammx, xxx, yt