Top tier 1 networks


Networks hosting DNS root servers

Verisign (A), Los Nettos (B), Cogent (C), Uni. Maryland (D), NASA (E), ISC (F), U.S. DOD (G), U.S. Army (H), Netnod (I), Verisign (J), RIPE (K), ICANN (L), WIDE (M)


Other networks