| Base | Record | Name | IP | Reverse | Route | AS |
| classtrain.com | a | 216.183.224.147 United States | (none) | 216.183.224.0/19 Norlight Telecommunications, Inc. | AS7260 NORLIGHT Telecommunications, Inc. Routing policy for Norlight Internet Norlight prefers BGP community for filtering purpose |
| ns-soa | dns1.kalmbach.com | 198.97.56.70 United States | 198.97.56.0/24 | AS4323 TWTC Autonomous system for tw telecom . |
| ns | dns2.kalmbach.com | 216.183.224.12 United States | (none) | 216.183.224.0/19 Norlight Telecommunications, Inc. | AS7260 NORLIGHT Telecommunications, Inc. Routing policy for Norlight Internet Norlight prefers BGP community for filtering purpose |
| dns1.kalmbach.com | 198.97.56.70 United States | 198.97.56.0/24 | AS4323 TWTC Autonomous system for tw telecom . |
| mx | 2 | classtrain.com.s8a1.psmtp.com | 64.18.7.10 United States | s8a1.psmtp.com | 64.18.7.0/24 LLNW cust | AS26910 Postini Network |
| 4 | classtrain.com.s8a2.psmtp.com | 64.18.7.11 United States | s8a2.psmtp.com |
| 6 | classtrain.com.s8b1.psmtp.com | 64.18.7.13 United States | s8b1.psmtp.com |
| 8 | classtrain.com.s8b2.psmtp.com | 64.18.7.14 United States | s8b2.psmtp.com |
| com | ns-soa | a.gtld-servers.net | 192.5.6.30 United States | 192.5.6.0/24 VeriSign Route | AS36625 VERISIGN-AS VeriSign, Inc |
| ns | a.gtld-servers.net | 192.5.6.30 United States |
| b.gtld-servers.net | 192.33.14.30 United States | 192.33.14.0/24 VeriSign Route | AS26415 VERISIGN-AS VeriSign, Inc |
| c.gtld-servers.net | 192.26.92.30 United States | 192.26.92.0/24 VeriSign Route | AS36625 VERISIGN-AS VeriSign, Inc |
| d.gtld-servers.net | 192.31.80.30 United States | 192.31.80.0/24 VeriSign Route | AS36617 VERISIGN-AS VeriSign, Inc |
| e.gtld-servers.net | 192.12.94.30 United States | 192.12.94.0/24 VeriSign Route | AS36629 VERISIGN-AS VeriSign, Inc |
| f.gtld-servers.net | 192.35.51.30 United States | 192.35.51.0/24 VeriSign Route | AS36620 VERISIGN-AS VeriSign, Inc |
| g.gtld-servers.net | 192.42.93.30 United States | 192.42.93.0/24 VeriSign Route | AS36624 VERISIGN-AS VeriSign, Inc |
| h.gtld-servers.net | 192.54.112.30 United States | 192.54.112.0/24 VeriSign Route | AS36623 VERISIGN-AS VeriSign, Inc |
| i.gtld-servers.net | 192.43.172.30 United States | 192.43.172.0/24 VeriSign Route | AS36625 VERISIGN-AS VeriSign, Inc |
| j.gtld-servers.net | 192.48.79.30 United States | 192.48.79.0/24 VeriSign Route | AS36626 VERISIGN-AS VeriSign, Inc |
| k.gtld-servers.net | 192.52.178.30 United States | 192.52.178.0/24 VeriSign Route | AS36622 VERISIGN-AS VeriSign, Inc |
| l.gtld-servers.net | 192.41.162.30 United States | 192.41.162.0/24 VeriSign Route | AS36628 VERISIGN-AS VeriSign, Inc |
| m.gtld-servers.net | 192.55.83.30 United States | 192.55.83.0/24 VeriSign Route | AS36618 VERISIGN-AS VeriSign, Inc |