hellas online hellas online is one of the leading integrated broadband telecommunications services providers in Greece offering a broad range of retail, business and wholesale services. hellas online owns and operates the second largest core backbone network in Greece. Products: Fixed telephony services (hol telephony), internet, a combination of the above (hol double-play) for residential customers, and IPTV (hol tv). hellas online offers a series of services for corporate clients ranging from small privately-owned businesses to multinational companies and large organizations, such as: telephony services, ADSL Internet, Virtual Private Networks – VPN, SDH and metro Ethernet leased lines, web hosting, data centers, wholesale provision to other providers and cloud services. Infrastructure Network: Fiber core network based on Dense Wavelength Division Multiplexing (DWDM) technology. >5,300 Km. of fiber-optics in Greece, which reaches 50 districts and 141 cities. Clients: 535,000+ Residential (LLU) 5,000+ Corporate (1,500 through FTTB solutions)