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Sorry, we have no information about web.plasa.com. plasa.com is a domain controlled by five nameservers at plasa.com themselves. Two of them are on the same IP network. Incoming mail for plasa.com is handled by two mailservers at mail.plasa.com. They are on the same IP network. plasa.com has one IP number.

plasa.com
a records
 
+ 202.134.0.12 202.134.0.0/21 AS17974  
+ ---  
ns-soa records
 
+   AS?  
+ ---  
ns records
dns1.plasa.com
+ 202.134.0.62 202.134.0.0/21 AS17974 dns1.telkom.net.id
+ --- dns1.telkom.net.id
dns2.plasa.com
+ 222.124.18.62 222.124.18.0/24 AS17974 dns2.telkom.net.id
+ --- dns2.telkom.net.id
ns1.plasa.com
+ 203.130.196.6 203.130.192.0/18 AS17974 ns1.telkom.net.id
+ --- ns1.telkom.net.id
ns2.plasa.com
+ 222.124.204.34 222.124.204.0/24 AS17974 ns2.telkom.net.id
+ --- ns2.telkom.net.id
ns3.plasa.com
+ 202.134.1.5 202.134.0.0/21 AS17974 ns3.telkom.net.id
+ --- ns3.telkom.net.id
mx records
mx1.mail.plasa.com
+ 222.124.18.71 222.124.18.0/24 AS17974 -
+ --- -
mx2.mail.plasa.com
+ 222.124.18.72 222.124.18.0/24 AS17974 -
ip numbers using ptr to this host
202.134.0.11
202.134.0.12