K256AS (99.1 FM, "Star 99.1") is a relay transmitter in Honolulu, Hawaii. Owned by iHeartMedia, the station serves as an analog simulcast of KUCD-HD2, KUCD's HD Radio subchannel, carrying an alternative rock format.

Relays KUCD-HD2, Pearl City
Broadcast areaOahu
Frequency99.1 MHz
BrandingStar 99.1
FormatAlternative rock
AffiliationsCompass Media Networks
Premiere Networks
First air date
Technical information
Facility ID152379
ERP250 watts
HAAT31.7 meters (104 ft)
WebcastListen Live

Station History


The license to this station was granted on July 30, 2007, as a retranslator for KDNN, airing traditional Hawaiian music as "Hawai’i No Ka Oi" (translated as "Indeed the Best"). Local radio personalities Lanai and Augie (previously of main KDNN station) hosted their own morning talk show Weekdays from 6 to 9AM.

On June 27, 2014, the format was replaced by the iHeartRadio EDM/Dance platform "Evolution" and switched its HD2 subchannel carrier from KDNN to KHJZ.[1] The station follows the Dance/EDM "Evolution" format, but is customized for Honolulu with local traffic reports and liners targeting its competitors. "Hawai’i No Ka Oi" continues on KDNN's HD2 sub channel and as an iHeartRadio platform.

On September 9, 2016, K256AS dropped the "Evolution" format to take KHJZ's displaced Rhythmic AC/Classic Hip-Hop format, and rebranded as "99.1 Jamz." The move was to allow KUBT to incorporate the Dance/EDM crossovers into its relaunched Rhythmic Top 40 direction.[2]

On November 22, 2019, K256AS dropped the "Jamz" format (which continued on KUBT-HD2 and on its own iHeart stream, rebranded as "Jamz Hawaii") and flipped to an Asian CHR format as PoP! 99.1. The station's new format predominantly features K-pop (including collaborations with U.S. artists), as well as other Chinese, Filipino, and Japanese acts.[3]

On May 16, 2023, iHeartMedia announced that KUCD and K256AS/KUCD-HD2 would swap formats at 10AM the following Thursday, the 18th, with K256AS set to inherit the alternative rock format of 101.9 as "Star 99.1".[4]


  1. ^ Evolution Comes to Honolulu
  2. ^ "Jamz Quickly Return To Honolulu" from Radio Insight (September 15, 2016)
  3. ^ "Pop 99.1 Debuts In Honolulu With International Hits". RadioInsight. 2019-11-24. Retrieved 2020-02-20.
  4. ^ Pop 99.1, Star 101.9 Honolulu to Swap Frequencies

21°18′49″N 157°51′43″W / 21.3137°N 157.8619°W / 21.3137; -157.8619