Summary
baltimore1.l3.net is a domain controlled by one nameserver.
mediaplane.net,
dal1.level3.net,
sea1.level3.net,
voice.level3.net,
3.8.in-addr.arpa and at least 53 other hosts share nameservers with this domain.
l3.net is delegated to two nameservers, however two extra nameservers are listed in the zone. There are two duplicated IP numbers. Some of them are on the same IP network. Incoming mail for
l3.net is handled by two mailservers having a total of eight IP numbers. There are five duplicated IP numbers. Some of them are on the same IP network.
l3.net has one IP number.