Applet - IP based in Soud part of Sofia
BGNET - IP in east part of Sofia - 705187, 731120, root@bgnet.bg
ICN - IP in the Centrum Sofia - National Palace of Culture (NDK)
Mobiltel - IP in the Centrum of the city
NetBG - IP in the east part of Sofia complex Mladost
Techno - link - IP based nearest highway Sofia-Plovdiv, front kompl. Mladost 1A
EUnet - Digital systems