How to perform reverse DNS. I got list of IP's want to know hostnames

[Sachinart]

Hello, I am not sure if it has feature or not.

Is there any way to perform reverse DNS? IP's to hostnames.

Thank You!

• Chirag

[forgedhallpass]

Check out dnsx

Example:

echo 173.0.84.0/24 | dnsx -silent -resp-only -ptr

cors.api.paypal.com
trinityadminauth.paypal.com
cld-edge-origin-api.paypal.com
appmanagement.paypal.com
svcs.paypal.com
trinitypie-serv.paypal.com
ppn.paypal.com
pointofsale-new.paypal.com
pointofsale.paypal.com
slc-a-origin-pointofsale.paypal.com
fpdbs.paypal.com

[Sachinart]

I already know that, That's not much faster & lack of output :)
For an example:
echo 17.0.0.0/9 | dnsx -silent -resp-only -ptr -t 1000 -r ~/dns.txt

Only these comes as output:

usrno1-bb-cr1.corp.apple.com
uslax1-bb-cr2.corp.apple.com
usden5-bb-cr1.corp.apple.com
usden5-bb-cr2.corp.apple.com
uschi5-bb-cr1.corp.apple.com
usrno1-bb-cr2.corp.apple.com
usatl4-bb-cr2.corp.apple.com
ussea4-bb-cr2.corp.apple.com
hkhkg1-bbisp-gw1.corp.apple.com
usnkq1-bb-cr2.corp.apple.com
usnkq1-bb-cr1.corp.apple.com
gbmnc1-bbisp-gw1.corp.apple.com
usuqo1-bb-cr2.corp.apple.com
ussea4-bbisp-gw1.corp.apple.com
usnyc5-bb-cr1.corp.apple.com
inbom2-bbisp-gw1.corp.apple.com
usprz2-bb-pe1.corp.apple.com
usrno3-bb-pe1.corp.apple.com
sgsin8-bbisp-gw2.corp.apple.com
ussjc2-bbisp-gw2.corp.apple.com
usmes1-bbisp-gw1.corp.apple.com
usqas3-bb-pe3.corp.apple.com
usuqo4-bbisp-gw1.corp.apple.com
usmsc2-bb-pe4.corp.apple.com
dkcph4-bbisp-gw2.corp.apple.com
usnyc5-bb-cr2.corp.apple.com
usnyc3-bbisp-gw1.corp.apple.com
ausyd2-bbisp-gw2.corp.apple.com
usqas2-bbisp-gw2.corp.apple.com
usscz2-bbisp-gw2.corp.apple.com
uschi6-bb-pe4.corp.apple.com
usrno3-bb-cr2.corp.apple.com
defra1-bbisp-gw2.corp.apple.com
usqas3-bb-pe2.corp.apple.com
usrno3-bb-cr1.corp.apple.com
usrno1-bb-pe1-new.corp.apple.com
inmaa1-bbisp-gw1.corp.apple.com
usmsc2-bb-cr1.corp.apple.com
iedub1-bbisp-gw1.corp.apple.com
hkhkg3-bbisp-gw1.corp.apple.com
inbom2-bbisp-gw2.corp.apple.com
usmsc2-bb-cr2.corp.apple.com
ieork1-bbisp-gw2.corp.apple.com
usscz2-bbisp-gw1.corp.apple.com
usqas3-bb-pe1.corp.apple.com
frcch1-bbisp-gw1.corp.apple.com
usscz2-bb-cr1.corp.apple.com
ussea4-bbisp-gw2.corp.apple.com
usprz2-bb-pe2.corp.apple.com
usuqo1-bb-pe1.corp.apple.com
usatl4-bb-cr1.corp.apple.com
usmes1-bbisp-gw2.corp.apple.com
usrno1-bb-pe2-new.corp.apple.com
usuqo4-bbisp-gw2.corp.apple.com
usscz2-bb-cr2.corp.apple.com
usxqm1-bb-cr1.corp.apple.com
dedus1-bbisp-gw1.corp.apple.com
usprz3-bb-cr1.corp.apple.com
usprz3-bb-pe1.corp.apple.com
defra3-bbisp-gw2.corp.apple.com
uschi5-bb-cr2.corp.apple.com
defra1-bbisp-gw1.corp.apple.com
usmia1-bbisp-gw2.corp.apple.com
usprz3-bb-cr2.corp.apple.com
usmsc2-bb-cr4.corp.apple.com
ausyd2-bbisp-gw1.corp.apple.com
usewr1-bb-cr1.corp.apple.com
ussea4-bb-cr1.corp.apple.com
frcch1-bbisp-gw2.corp.apple.com
usprz3-bb-pe2.corp.apple.com
defra3-bbisp-gw1.corp.apple.com
dedus1-bbisp-gw2.corp.apple.com
gbmnc1-bbisp-gw2.corp.apple.com
usewr1-bb-cr2.corp.apple.com
sgsin8-bbisp-gw1.corp.apple.com
usuqo4-bb-cr1.corp.apple.com
usmsc2-bb-cr3.corp.apple.com
usuqo1-bb-cr1.corp.apple.com
usuqo4-bb-cr2.corp.apple.com
usdal4-bb-cr1.corp.apple.com
dkcph4-bbisp-gw1.corp.apple.com
uschi6-bb-pe3.corp.apple.com
ieork1-bbisp-gw1.corp.apple.com
usprz2-bb-cr2.corp.apple.com
usprz2-bb-cr1.corp.apple.com
usrno3-bb-pe2.corp.apple.com
usqas2-bbisp-gw1.corp.apple.com
usuqo1-bb-pe2.corp.apple.com
hkhkg1-bbisp-gw2.corp.apple.com
iedub1-bbisp-gw2.corp.apple.com
usqas3-bb-pe4.corp.apple.com
usxqm1-bb-cr2.corp.apple.com

But using - hakrevdns, I am able to get more than 11K output

I want faster & proper working tool for IP to hostname resolve :)

Thank you!