疑問 - 有關tw.yahoo.com的名稱解析問題

[rezard]

大家好：
小弟今天在辦公室測試Hinet的DNS 168.95.192.1與Seednet的南部DNS 139.175.10.20二個設定解析tw.yahoo.com網址，發現二個解出來的對應IP不一樣，Hinet解出202.43.195.52，Seednet解出203.84.202.164，透過TWNIC反查註冊單位，結果分別剪貼如下：

Hinet解出的202.43.195.52：
http://wq.apnic.net/apnic-bin/whois....=202.43.195.52

inetnum: 202.43.192.0 - 202.43.223.255
netname: YAHOO-ASIA-1
descr: Internet Content Crovider
country: US
admin-c: YI12-AP
tech-c: YI12-AP
status: ALLOCATED PORTABLE
mnt-by: APNIC-HM
mnt-lower: MAINT-AP-YAHOO-INC
remarks: -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
remarks: This object can only be modified by APNIC hostmaster
remarks: If you wish to modify this object details please
remarks: send email to hostmaster@apnic.net with your organisation
remarks: account name in the subject line.
remarks: -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
changed: hm-changed@apnic.net 20030807
changed: hm-changed@apnic.net 20041013
changed: hm-changed@apnic.net 20050311
source: APNIC

route: 202.43.192.0/21
descr: Yahoo Taiwan
country: TW
origin: AS10229
mnt-by: MAINT-AP-YAHOO-INC
changed: gnelson@yahoo-inc.com 20030813
source: APNIC

role: YAHOO INC
address: 701 First Avenue
address: Sunnyvale, CA 94089
country: US
phone: +1 408 349 3300
fax-no: +1 408 349 3301
e-mail: netblockadmin@yahoo-inc.com
trouble: send spam and abuse reports to abuse@yahoo.com
trouble: or visit http://abuse.yahoo.com
admin-c: KW133-AP
tech-c: KW133-AP
tech-c: SD210-AP
nic-hdl: YI12-AP
notify: netops@yahoo-inc.com
mnt-by: MAINT-AP-YAHOO-INC
changed: kirkw@yahoo-inc.com 20061211
source: APNIC

--------------------------------------------------（分隔線）

Seednet解出的203.84.202.164：
http://wq.apnic.net/apnic-bin/whois....203.84.202.164

inetnum: 203.84.192.0 - 203.84.223.255
netname: YAHOO-ASIA-3
descr: Internet Content Provider
country: AP
admin-c: YI12-AP
tech-c: YI12-AP
mnt-by: APNIC-HM
mnt-lower: MAINT-AP-YAHOO-INC
status: ALLOCATED PORTABLE
remarks: -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
remarks: This object can only be updated by APNIC hostmasters.
remarks: To update this object, please contact APNIC
remarks: hostmasters and include your organisation's account
remarks: name in the subject line.
remarks: -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
changed: hm-changed@apnic.net 20050121
changed: hm-changed@apnic.net 20050121
changed: hm-changed@apnic.net 20050311
changed: hm-changed@apnic.net 20050830
source: APNIC

route: 203.84.200.0/22
descr: Yahoo TPC
country: TW
origin: AS24031
mnt-by: MAINT-AP-YAHOO-INC
changed: stephend@yahoo-inc.com 20051114
source: APNIC

role: YAHOO INC
address: 701 First Avenue
address: Sunnyvale, CA 94089
country: US
phone: +1 408 349 3300
fax-no: +1 408 349 3301
e-mail: netblockadmin@yahoo-inc.com
trouble: send spam and abuse reports to abuse@yahoo.com
trouble: or visit http://abuse.yahoo.com
admin-c: KW133-AP
tech-c: KW133-AP
tech-c: SD210-AP
nic-hdl: YI12-AP
notify: netops@yahoo-inc.com
mnt-by: MAINT-AP-YAHOO-INC
changed: kirkw@yahoo-inc.com 20061211
source: APNIC

--------------------------------------------------（分隔線）
經過tracer route，發現Seednet解出來的目的IP非但節點較多，且還經過p4-7-1-0-3.r20.tokyjp01.jp.bb.gin.ntt.net [129.250.8.5] 這個看似出國後又繞回來的路由節點。

想請教諸位大大：
一、請問你們那頭測試結果（分設二家DNS）是否一樣？（小弟是用windows xp pro的電腦，nslookup指令與tracert指令，ISP是GSN）
二、這是Yahoo自身的問題嗎？