As follows you will find an overview of the current nameserver locations:
ns.inwx.com / ns.domrobot.com
IPv4 address: 192.174.68.104
IPv6-address: 2001:67c:1bc::104
Location: Anycast DNS ¹
ns2.inwx.com / ns.domrobot.net
IPv4 address: 176.97.158.104
IPv6-address: 2001:67c:10b8::104
Location: Anycast DNS ²
ns3.inwx.eu / ns.domrobot.org
IPv4 address: 45.87.158.53
IPv6 address: 2a02:d500::53
Location: Berlin, DE
Locations Anycast DNS ¹
Amsterdam, Atlanta, Chicago, Dallas, Dublin, Frankfurt, Hongkong, Johannesburg, London, Los Angeles, Madrid, Miami, Moscow, Mumbai, New York, Paris, Reykjavik, Salzburg, Sao Paulo, Seattle, Singapore, Stockholm, Sydney, Tokyo, Warsaw, Vienna, Zurich
Locations Anycast DNS ²
Amsterdam, Athens, Chicago, Dallas, Dubai, Frankfurt, Genf, Hong Kong, Johannesburg, Ljubljana, London, Miami, Reston, San Jose, Sao Paulo, Seattle, Seoul, Sydney, Toronto, Vienna