DomainTools Reverse Who.is

[utomo]

anybody try reverse who.is ?
I have some question:
1. Any alternative way ? or cheaper ?
2. do they accurate and worth ?
3. Anybody have the discount coupon ?

Thanks

 

[alanchau]

Whoisology.com has a similar function, although slightly less accurate.

 

[utomo]

Thanks,

Finally I use whois xml api