Not to be confused with Teheran.

Teheranno (alternatively Teheran-ro, translation “Tehran

Tehran

Tehran , sometimes spelled Teheran, is the capital of Iran and Tehran Province. With an estimated population of 8,429,807; it is also Iran's largest urban area and city, one of the largest cities in Western Asia, and is the world's 19th largest city.In the 20th century, Tehran was subject to...

 Boulevard”) is a street in the Gangnam district

Gangnam District

Gangnam, Seocho and Songpa are three "gu" in Seoul, South Korea, individually known as Gangnam-gu, Seocho-gu and Songpa-gu and often collectively referred to as "Gangnam". These districts are known for their expensive real estate. Media reports frequently refer to this area when they cover stories...

 of Seoul

Seoul

Seoul , officially the Seoul Special City, is the capital and largest metropolis of South Korea. A megacity with a population of over 10 million, it is the largest city proper in the OECD developed world...

, South Korea

South Korea

The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...

. It runs from Gangnam Station through Yeoksam-dong

Yeoksam-dong

Yeoksam-dong is a ward of Gangnam-gu, Seoul, South Korea. Teheranno runs through Yeoksam-dong and holds many of the tallest buildings in Seoul in a collection of corporate headquarters and high-rise office buildings....

 and into Samseong-dong

Samseong-dong

Samseong-Dong is a ward of Gangnam-gu in Seoul, South Korea.-See also:*COEX Convention & Exhibition Center*POSCO*Bongeunsa*Dong of Gangnam-gu*Kimchi Field Museum-External links:...

. It is colloquially known as “Teheran Valley” (after Silicon Valley

Silicon Valley

Silicon Valley is a term which refers to the southern part of the San Francisco Bay Area in Northern California in the United States. The region is home to many of the world's largest technology corporations...

) due the number of internet

Internet

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite to serve billions of users worldwide...

-related companies operating there, including Yahoo!

Yahoo!

Yahoo! Inc. is an American multinational internet corporation headquartered in Sunnyvale, California, United States. The company is perhaps best known for its web portal, search engine , Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Groups, Yahoo! Answers, advertising, online mapping ,...

, and Korean rivals Daum and Naver. Semiconductor

Semiconductor

A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...

 powerhouses (and rivals) Samsung

Samsung

The Samsung Group is a South Korean multinational conglomerate corporation headquartered in Samsung Town, Seoul, South Korea...

 and Hynix

Hynix

Hynix Semiconductor Inc. chips and flash memory chips. Founded in 1983, Hynix is the world's second-largest memory chipmaker, the largest being Samsung Electronics. Formerly known as Hyundai Electronics, the company has manufacturing sites in Korea, the U.S., China and Taiwan...

 both operate offices here as well. Various Korean and international financial and business institutions including POSCO

POSCO

POSCO is a multinational steel-making company headquartered in Pohang, South Korea. It is the world's third-largest steelmaker by market value and the most profitable Asia-based steelmaker....

, Standard Chartered and Citibank

Citibank

Citibank, a major international bank, is the consumer banking arm of financial services giant Citigroup. Citibank was founded in 1812 as the City Bank of New York, later First National City Bank of New York...

 also maintain offices here. Some of Korea's tallest skyscrapers and most expensive real estate are on Teheranno, while Seoul Metropolitan Government estimates that more than half of Korea's venture capital, some 200,000,000,000 won (approximately $200,000,000), is invested in Teheran Valley.

Teheranno is a 3.5 km section of Korean Highway 90, and runs eastwards from Gangnam Station

Gangnam Station

Gangnam Station is a station in the Gangnam district of Seoul, on the Seoul Subway Line 2. As of 2007, it is the busiest subway station in the whole Seoul Metropolitan Subway system, with approximately 123,000 daily passengers using it on average....

 to Samseong Station

Samseong Station

Samseong Station is a station on the Seoul Subway Line 2. It serves the eastern area of Teheranno. Some of the more famous buildings near the station include World Trade Center Seoul, COEX Mall, Korea Electric Power headquarters, Korea Air City Terminal , and Gangnam main police and fire...

 and the COEX

COEX

COEX may refer to:*COEX Convention & Exhibition Center, a commercial facility in Seoul, South Korea*COEX Mall, an underground shopping center in Seoul, South Korea...

/KWTC complex. Yeoksam

Yeoksam Station

Yeoksam Station is a station on the Seoul Subway Line 2.It is located in Yeoksam-dong, Gangnam-gu, Seoul.-Vicinity:*Exit 4 : Kukkiwon *Exit 7 : Cha Hospital, LG Arts Center-References:...

 and Seolleung

Seolleung Station

Seolleung Station is a Seoul Subway station, on Line 2 and the Bundang Line. The station is named after the nearby Seonjeongneung, the Joseon Dynasty royal tombs Seolleung and Jeongneung ....

 stations are also on Teheranno. All stations are on Seoul Subway Line 2

Seoul Subway Line 2

Seoul Subway Line 2 is a circular line of the Seoul Metropolitan Subway. The line running clockwise is called the "inner circle line" and the counter-clockwise line is called the "outer circle line." This is Seoul's most heavily used line, and the longest circular subway line in the world...

.

Name

In 1976, the Seoul Metropolitan Government suggested that the city of Seoul and Tehran

Tehran

Tehran , sometimes spelled Teheran, is the capital of Iran and Tehran Province. With an estimated population of 8,429,807; it is also Iran's largest urban area and city, one of the largest cities in Western Asia, and is the world's 19th largest city.In the 20th century, Tehran was subject to...

, Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

 exchange the names of streets on the occasion of the visit to Korea of the Mayor of Tehran. The following year, the street previously named Samneungno was renamed Teheranno, which ran through a relatively underdeveloped area recently annexed into Seoul (in 1963). In the following years, the district of Gangnam-gu

Gangnam-gu

Gangnam-gu is one of the 25 gu which make up the city of Seoul, South Korea. It is one of the most affluent areas of Seoul and is located in the southeast of the city...

 experienced phenomenal growth and waves of construction that continues even today, with Teheranno becoming one of the busiest streets in South Korea. Seoul St. in Tehran runs in the north of that city, close to the Evin

Evin

Evin is a neighbourhood in the north of Tehran.The district consists of an old section, filled with orchards and gardens of old houses, and a new section, with towering high rises and gleaming skyscrapers....

district.