Incoming mail for at.strabag.com is handled by four mailservers. All of them are on the same IP network. domino.at.strabag.com and atdaviem1601.at.strabag.com are subdomains to this hostname. strabag.com is a domain controlled by three nameservers at telekom.at. All of them are on different IP networks. Incoming mail for strabag.com is handled by four mailservers. All of them are on the same IP network. strabag.com has one IP number.