# Resolv.getname

**URL:** <https://www.ruby-forum.com/t/resolv-getname/142857>\
**Category:** Rails\
**Created:** [July 12, 2008, 6:28am UTC](https://www.ruby-forum.com/t/resolv-getname/142857 "2008-07-12T06:28:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![giorgio](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/cab0a1/32.png) [@giorgio](https://www.ruby-forum.com/u/giorgio)\
**Post date:** [July 12, 2008, 6:28am UTC](https://www.ruby-forum.com/t/resolv-getname/142857/1 "2008-07-12T06:28:10Z")

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Hi,

I have been using Resolv.getname to verify that a callback has come  
from our secure payments processor.

If I do:  
nslookup 155.136.68.24

I get:

Non-authoritative answer:  
24.68.136.155.in-addr.arpa name = [wcc2.worldpay.com](http://wcc2.worldpay.com).

However if I do:  
Resolv::getname(‘155.136.68.24’)

I get:  
irb(main):005:0\> Resolv.getname(‘155.136.68.24’)  
Resolv::ResolvError: no name for 155.136.68.24

Can anyone shed any light or suggest a better way of verifying the ip  
address?

Cheers  
George