Tracing to ns2.123vietnam.vn[a] 
208.88.224.54 (208.88.224.54) Got answer
 |\___ ns1.pavietnam.vn
[123vietnam.vn] (112.213.89.3) Got authoritative
answer
 |\___
nsbak.pavietnam.vn [123vietnam.vn] (112.213.89.3)
(cached)
  \___
ns2.pavietnam.vn [123vietnam.vn] (210.245.120.10)
Got authoritative answer

ns2.pavietnam.vn (210.245.120.10)      
ns2.123vietnam.vn -> 112.213.89.38
ns1.pavietnam.vn (112.213.89.3)        
ns2.123vietnam.vn -> 112.213.89.38
208.88.224.54 (208.88.224.54)          
ns2.123vietnam.vn -> 112.213.89.38

QUESTION SECTION:
ns2.123vietnam.vn.	IN	ANY

ANSWER SECTION:
ns2.123vietnam.vn.	359	IN	A	112.213.89.38

AUTHORITY SECTION:
123vietnam.vn.	31836	IN	NS	ns1.pavietnam.vn.
123vietnam.vn.	31836	IN	NS	nsbak.pavietnam.vn.
123vietnam.vn.	31836	IN	NS	ns2.pavietnam.vn.

ADDITIONAL SECTION:
nsbak.pavietnam.vn.	55	IN	A	112.213.89.3
ns1.pavietnam.vn.	55	IN	A	112.213.89.3
ns2.pavietnam.vn.	55	IN	A	210.245.120.10

Query time: 0 msec
SERVER: secureserver#53(secureserver)
WHEN: Tue Aug 23 15:47:48 2011
MSG SIZE  rcvd: 165

HOST: Ubuntu-1104-natty-64-minimal              
Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- static.193.37.46.78.clients.your-server.de
 0.0%     1   
4.0   4.0   4.0   4.0   0.0
  2.|-- hos-tr3.juniper2.rz10.hetzner.de
           0.0%     1    0.2  
0.2   0.2   0.2   0.0
  3.|-- hos-bb1.juniper1.ffm.hetzner.de
            0.0%     1    4.8  
4.8   4.8   4.8   0.0
  4.|-- r1fra1.core.init7.net
                      0.0%     1    5.1  
5.1   5.1   5.1   0.0
  5.|-- r1lon1.core.init7.net
                      0.0%     1   16.5 
16.5  16.5  16.5   0.0
  6.|-- 195.66.236.167                            
 0.0%     1  
18.8  18.8  18.8  18.8   0.0
  7.|-- vnpt.ge5-4.br01.hkg04.pccwbtn.net
          0.0%
    1  318.6 318.6 318.6 318.6   0.0
  8.|-- 111.91.232.74                             
 0.0%     1 
352.6 352.6 352.6 352.6   0.0
  9.|-- ???                                       
100.0     1    0.0
  0.0   0.0   0.0   0.0
 10.|-- 112.213.80.13                             
 0.0%     1 
352.7 352.7 352.7 352.7   0.0
 11.|-- 112.213.80.66                             
 0.0%     1 
326.2 326.2 326.2 326.2   0.0
 12.|-- 112.213.80.83                             
 0.0%     1 
353.7 353.7 353.7 353.7   0.0
 13.|-- 112.213.80.2                              
 0.0%     1 
363.7 363.7 363.7 363.7   0.0
 14.|-- 112.213.82.26                             
 0.0%     1 
326.6 326.6 326.6 326.6   0.0
 15.|-- 112.213.80.59                             
 0.0%     1 
310.8 310.8 310.8 310.8   0.0
 16.|-- ns8938.dotvndns.vn                        
 0.0%     1 
372.8 372.8 372.8 372.8   0.0

(ns2.123vietnam.vn, 112.213.89.38): ISC BIND
9.2.3rc1 -- 9.4.0a0