ns2.steffann.eu [136.144.204.85] [2a01:7c8:d000:43e::1]
dwcon.org go6.si go6lab.si idwcon.org ipv6-lab.net nat64check.org nety.net nistco.eu nog.community nogalliance.org onderwijs.net simplyunderstand.com sintact.nl steffann.nl vames.nl