ns1.recol.es has one IP number , which also has a corresponding reverse pointer. ns1.losdelmonte.net point to the same IP. rcp.es, rea.es, cop.es, fys.es, reaf.es and at least 100 other hosts use this as a nameserver. recol.es is a domain controlled by two nameservers at recol.es themselves. They are on the same IP network. Incoming mail for recol.es is handled by two mailservers also at recol.es. They are on the same IP network. ns1.recol.es is hosted on a server in Spain.