"The number gained about 70,000 a month this year on average, or upside of 400,000 in the first half alone. The overall figure is on pace to approach 15 million late this year," he said.

In and around Seoul, almost every household is connected to broadband service, with the combined penetration rate even over 100 percent.

Experts said the seamless increase of high-speed Internet was due to the emergence of the country's number three broadband operator LG Powercomm and other small-sized companies.