domainSummaryctb.com ("CTB/McGraw-Hill - Publisher of standardized achievement tests and custom assessments including TerraNova, Fox in a Box, SUPERA, LAS, TABE, TestMate, NEDT, CDRT, and CDMT. The mission is to help the teacher help the child.") is delegated to three nameservers, however all three delegated nameservers are missing in the zone and two other nameservers are listed. There are two duplicated IP numbers. All of them are on the same IP network. Incoming mail for ctb.com is handled by four mailservers at mcgraw-hill.com. Some of them are on the same IP network. ctb.com has one IP number. mhkids.com, www.ctb.com and bmsqa.ctb.com point to the same IP. breakthr.com, mcgraw-hill.es, wrightgroup.com and mayfieldpub.com share both nameservers and mailservers with this domain. mhls.net, mhln.net, mhln.com, mhhe.com, eppg.com and at least 26 other hosts share nameservers with this domain. mgh.com, kgtv.com, rtv6.com, jdpa.com, kero.com and at least 26 other hosts share mailservers with this domain. ftp.ctb.com, www.ctb.com, oas.ctb.com, www5.ctb.com, www6.ctb.com and at least ten other hosts are subdomains to this hostname. ctb.com is ranked #714810 world wide and is hosted on a server in United States. It is listed in Reference/Education/Instructional_Technology/Evaluation.Trustworthiness, vendor reliability and privacy of this site is good. Child safety is excellent. (more on reputation). 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DNS Records| base | record | name | ip | reverse | route | as | | ctb.com | a | 204.8.133.144 United States | (none) | 204.8.132.0/22 PNAP-PHI mcgrawhill routes | AS4546 MCGRAW-AS McGraw-Hill | | ns-soa | ctb.com | 204.8.133.144 United States | (none) | | ns | ns1.eppg.com (only in zone) | 12.26.55.187 United States | (none) | 12.26.55.0/24 | | ns1.mhedu.com (only in delegation) | 12.26.55.187 United States | | ns2.eppg.com (only in zone) | 198.45.22.9 United States | 198.45.22.0/24 PNAP-PHI mcgrawhill route | | ns2.mhedu.com (only in delegation) | 198.45.22.9 United States | ns2.eppg.com | | ns3.mhedu.com (only in delegation) | 208.68.164.194 United States | gesserit.eppg.com | 208.68.160.0/21 | AS14935 MONTICELLO Monticello Networks - NetConnect | | mx | 20 | corp148mr3.mcgraw-hill.com | 198.45.18.165 United States | 198.45.18.0/24 | AS4546 MCGRAW-AS McGraw-Hill | | 30 | corp55wmr3.mcgraw-hill.com | 198.45.19.154 United States | 198.45.19.0/24 | | 20 | corp148mr4.mcgraw-hill.com | 198.45.18.181 United States | 198.45.18.0/24 | | 20 | corp55wmr4.mcgraw-hill.com | 198.45.19.170 United States | 198.45.19.0/24 | | 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 |
net gtld-servers.net mcgraw-hill.com eppg.com mhedu.com Thumbnails powered by Thumbshotsshareddomains sharing mailservers under another namemgh.com
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