KNBR is a San Francisco, California AM radio station, broadcasting on a clear channel at 680 kHz from transmitting facilities near Belmont, California. KNBR's non-directional 50,000-watt class-A signal can be heard throughout much of the western United States and as far west as the Hawaiian Islands at night. For several decades, KNBR enjoyed a long history as the flagship station of NBC's West Coast radio operations.

A second station also uses the KNBR brand. KTCT (1050 kHz) is licensed to San Mateo, California, with a transmitter located near Hayward, California. It carried a separate sports format known as The Ticket. The Sports Leader is the on-air branding used by both stations. The KNBR re-branding took place in 2003. Both stations' studios are located at 750 Battery Street in San Francisco's Financial District.[1]

Between the two stations, games of the San Francisco Giants, San Francisco 49ers, and Stanford Cardinals are broadcast to the San Francisco Bay Area. KTCT is available in the HD format on 1050 kHz.[2]

KNBR logo
CitySan Francisco, California
Broadcast areaSan Francisco Bay Area
BrandingKNBR 680
SloganThe Sports Leader
Frequency680 (kHz)
Repeater(s)107.7-2 KSAN-HD2
First air dateApril 17, 1922
FormatCommercial; Sports
Power50,000 watts
Facility ID35208
Transmitter coordinates37°32′50″N 122°14′00″W / 37.54722°N 122.23333°WCoordinates: 37°32′50″N 122°14′00″W / 37.54722°N 122.23333°W (main antenna)
37°32′50″N 122°13′58″W / 37.54722°N 122.23278°W (auxiliary antenna)
Callsign meaningK National Broadcasting Radio (a reference to former owner NBC)
Former callsignsKPO (1922–1946)
KNBC (1946–1962)
AffiliationsCBS Sports Radio
NBC Sports Radio
San Francisco 49ers
San Francisco Giants
OwnerCumulus Media Inc.
(Radio License Holding SRC LLC)
Sister stationsKTCT, KFOG, KGO, KSAN, KSFO
WebcastKNBR Webstream
KNBR Webstream (iHeart)


KPO and KGO Radio San Francisco circa 1940s
KPO and KGO building in the 1940s.

KNBR began broadcasting on April 17, 1922 as KPO, a 100-watt station owned by the Hale Brothers department store. In 1925, the San Francisco Chronicle newspaper bought half-interest in the operation.[3] Originally located in the department store at 901 Market between 5th and 6th,[4][5][6][7] its horizontal wire antenna on the roof was so efficient, it immediately attracted the attention of audiences all over the Pacific Coast.

In 1927, KPO became an affiliate of the new NBC radio network. In 1933, KPO was sold to NBC's parent company, the Radio Corporation of America (RCA),[3] and its operation was consolidated into that of its co-owned KGO at the Hunter-Dulin Building, 111 Sutter Street. From there, NBC operated its West Coast network, feeding dozens of stations and operating a news bureau to serve NBC. As NBC's flagship station on the West Coast, it had a full-time orchestra, five studios, and produced many live shows. During the rise of Hollywood, NBC's radio operation was moved to Los Angeles.

In 1941, just before World War II, NBC constructed Radio City at 420 Taylor Street, considered one of the best radio facilities built during radio's golden age. However, with the network control having been moved to Los Angeles, the San Francisco NBC building was never fully utilized. (Later, the building housed KBHK-TV, and now houses the headquarters of Reddit.)

During World War II, KPO's news bureau was the major source of NBC of news about the war in the Pacific, and operated shortwave radio stations (transmitters located in Dixon) serving the world. It was at the KPO (RCA) shortwave facility that the message was received that Japanese emperor Hirohito had surrendered, ending World War II.[8]

On November 23, 1947, NBC changed KPO's call sign to KNBC,[9][10][11] to strengthen its identity as an NBC station (and the only radio station NBC ever owned on the West Coast). This change lasted until fifteen years later, when the network decided to move the KNBC identity to its television station in Los Angeles. NBC had asked the FCC to restore the KPO call letters to the San Francisco radio station[12] but later withdrew that request[13] and 680 AM was renamed KNBR on November 11, 1962.[14]

In November 1949, NBC television affiliate KRON-TV went on the air. Only before the TV station's first airdate did NBC fight for the construction permit for the TV station until it lost the bid to the de Young family, then the owners of the San Francisco Chronicle.

In the 1950s when NBC scrapped its comedy, drama, variety shows, and serials, the Los Angeles facility was sold and demolished, and KNBC/KNBR once again became the West Coast NBC network control center and West Coast NBC Radio news operation.

KNBR evolved into a Middle of the road music format mixing in Adult Standards with Soft Rock cuts by the early 1960s. The station continued to be a news intensive format with personalities in the foreground and music in the background. Personalities included Frank Dill, Les Williams, Dave Niles, and Jack Hayes. Until January, 1975, KNBR carried NBC's long-running weekend show, Monitor. By the mid-1970s, KNBR evolved musically into a straight ahead adult contemporary music format and continued as such into the 1980s.

In March 1989 NBC sold KNBR to Susquehanna Radio Corporation; it was the last radio property held by NBC, which two years earlier made the decision to sell off its radio division following General Electric's 1986 acquisition of RCA.[15] The station soon added some sports talk in evenings, and took a full-time sports format in 1990 with the lone exception of The Rush Limbaugh Show, which KNBR carried from 1988 until 2000.

KNBR carried programs from ESPN Radio and KTCT aired shows from both ESPN Radio and Fox Sports Radio until 2013, when both stations switched to the Cumulus-distributed CBS Sports Radio.

In 2015, KNBR's studios were relocated from 55 Hawthorne Street to 750 Battery Street after parent Cumulus Media consolidated its San Francisco radio stations in one building.[1]

In June 2018, KNBR began broadcasting in HD Radio on KSAN's HD2 channel.[16]


KNBR and KTCT are owned by Cumulus Media Partners, LLC,[17] a private partnership of Cumulus Media, Bain Capital, The Blackstone Group, and Thomas H. Lee Partners. It was purchased from Susquehanna-Pfaltzgraff Media in 2005 along with other Susquehanna Radio Corporation stations.[18]

Sports content

KNBR has been the radio home of the San Francisco Giants since 1979. Play-by-play is done by Jon Miller and Dave Flemming. Miller and Flemming are frequently joined by Giants television broadcasters Mike Krukow and Duane Kuiper. The four announcers often share radio and TV broadcasting duties during a game.[19]

Tim Roye was the radio play-by-play announcer for the Golden State Warriors, and was occasionally joined by Jim Barnett on non-televised games as Barnett serves as an analyst for TV broadcasts. On August 25, 2016, the Warriors announced they have ended their partnership with KNBR and signed with KGMZ-FM. The partnership with KNBR lasted 40 years, including 32 consecutive years.[20]

A vast array of announcers participate in San Jose SaberCats broadcasts, including Tim Roye, Bob Fitzgerald, Ray Woodson, Keena Turner, George Atkinson, and Troy Clardy.

In 2005, KNBR became the official radio home of the San Francisco 49ers. All games are also heard on sister station KSAN; some AM broadcasts may be moved to KTCT due to conflicts with Giants games. 49ers games were broadcast by Joe Starkey and Gary Plummer for four seasons until Starkey's retirement following the 2008 season. In the 2009 season, former Giants baseball and world-class tennis announcer Ted Robinson took over for Starkey as the play-by-play announcer.

KNBR and KTCT are charter affiliates of CBS Sports Radio, a joint venture between CBS Radio and Cumulus, which started on January 2, 2013.[21] NBC Sports Radio is also carried on KTCT.


On KNBR, weekday programming consists of the following blocks, which are preempted or moved to KTCT when there are regularly scheduled sports events. The morning shows include Murph and Mac (Brian Murphy and Paul McCaffrey)[22] and The Gary Radnich Show with Larry Krueger.[23] The afternoon shows include Fitz and Brooks (Bob Fitzgerald and Rod Brooks),[24], Tolbert & Lund (Tom Tolbert and John Lund)[25] Evening and late-night shows include KNBR Tonight (Drew Hoffar and Kevin Frandsen, Ryan Covay)[26][27] Late night programming is usually filled in by hosts featured on CBS Sports Radio. Weekend programs include Commonwealth Club, Hooked on Golf, Protect Your Assets with David Hollander, Sports Saloon, At the Track, Gary Allen on Business, and assorted CBS Sports Radio programming.[28] KNBR also broadcasts the 49ers-themed talk show 49ers Radio (simulcast on CSN Bay Area) with the team's radio play-by-play announcer Ted Robinson as the show's main host.

On KTCT, weekday programming consists of the following blocks when not preempted by sports events. The morning shows have CBS Sports Radio with Barber, Tierney, Jacobsen; The John Feinstein Show, and The Jim Rome Show. The afternoon show is hosted by Ted Ramey and then The Tom Tolbert Show is simulcast with KNBR 680. The evening shows have Scott Ferrall's show Ferrall on the Bench,[29] followed by late-night programming from CBS Sports Radio and then NBC Sports Radio. Weekend programs include Mortgage Makeover and various CBS Sports and NBC Sports Radio programming. Commonwealth Club is presented early Sunday mornings.[30]

Framing the various San Francisco Giants events, Marty Lurie fills in as a host of SportsPhone 680 Giants Warm-Up and Wrap-Up shows on KNBR every weekend during the baseball season.[31]

Past programs

  • SportsPhone 680 with other hosts
    • SportsPhone 680 was formerly hosted by Larry Krueger, who was fired after a personal rant against the Giants on the show. During his rant, he criticized the Giants for brain-dead Caribbean hitters hacking at slop nightly. Krueger was first suspended for 10 days, then, on August 10, 2005, KNBR announced that it had ceased professional relations with Krueger. Damon Bruce took over the show in October 2005 and hosted until February 26, 2010, when he started his own noon–4 pm show on KNBR. FP Santangelo took over as SportsPhone680 host. His show lasted from March 1, 2010 to January 19, 2011, after the Washington Nationals hired him as their color commentator for MASN. Eric Byrnes took over as SportsPhone680 host, and hosted his first show on March 23, 2011. In May 2012 when Ralph Barbieri was fired by KNBR, Byrnes agreed to co-host with Tom Tolbert until they found a permanent co-host. Byrnes still hosted SportsPhone680 on days where the Giants played day games. He did his last show in July 2012 and Ray Woodson, who's filled in on SportsPhone680 many times and was formerly a sidekick on the Gary Radnich show, officially took over as host.[33]
  • Untitled (Public Affairs)

Originating as part of the station's statutory requirement of public affairs programming, the station continues to air an hourlong interview show Sunday mornings at 5 am.

During the 1990s, the program typically began and ended with the phrase This is Gimmy Park Li, your host. No program title was given. Interviews for this program often consisted of local individuals in volunteer, charitable, or minor governmental capacities.

Due to its time slot, the program is the quintessential example of the Sunday morning public affairs ghetto. The program has never been promoted outside of its timeslot. Gimmy Park Li was the station's public affairs director. Her signature was her sign off: This is Gimmy Park Li, your host. Thank you for spending your time ... with us.


  1. ^ a b Fong-Torres, Ben (November 5, 2015). "Former radio intern gets a once-in-a-Bleu-moon break". San Francisco Chronicle.
  2. ^ "Archived copy". Archived from the original on 2014-10-06. Retrieved 2014-10-02.CS1 maint: Archived copy as title (link)
  3. ^ a b "Call Letters of KPO Are Changed to KNBC" (PDF) (November 17, 1947). Broadcasting. Retrieved 22 October 2014.
  4. ^
  5. ^
  6. ^
  7. ^,9171,932188,00.html
  8. ^
  9. ^ "Call letters of KPO are changed to KNBC" (PDF). Broadcasting - Telecasting. November 17, 1947. p. 16.
  10. ^ "KPO changeover to KNBC celebrated by Pacific and stateside NBC pickups" (PDF). Broadcasting - Telecasting. December 1, 1947. p. 67.
  11. ^ "KNBC (AM) advertisement" (PDF). Broadcasting - Telecasting. December 15, 1947. p. 65.
  12. ^ "NBC call changes" (PDF). Broadcasting. July 23, 1962. p. 53.
  13. ^ "NBC withdraws plea for new call letters" (PDF). Broadcasting. September 3, 1962. p. 64.
  14. ^ "KNBC to L.A." (PDF). Broadcasting. November 12, 1962. p. 72.
  15. ^ "In brief" (PDF). Broadcasting. March 27, 1989. p. 87.
  16. ^
  17. ^ Cumulus Media Inc.
  19. ^
  20. ^
  21. ^ "CBS Creates the Largest Major Market Sports Radio Network in the Nation" (Press release). CBS. June 6, 2012. Retrieved January 20, 2013.
  22. ^ "Archived copy". Archived from the original on 2015-01-09. Retrieved 2015-01-09.CS1 maint: Archived copy as title (link)
  23. ^ "Archived copy". Archived from the original on 2014-07-01. Retrieved 2014-06-08.CS1 maint: Archived copy as title (link)
  24. ^ "Archived copy". Archived from the original on 2014-12-05. Retrieved 2014-12-21.CS1 maint: Archived copy as title (link)
  25. ^
  26. ^
  27. ^
  28. ^ "Archived copy". Archived from the original on 2015-01-09. Retrieved 2015-01-09.CS1 maint: Archived copy as title (link)
  29. ^ "Archived copy". Archived from the original on 2014-02-10. Retrieved 2015-01-16.CS1 maint: Archived copy as title (link)
  30. ^ "Archived copy". Archived from the original on 2015-01-14. Retrieved 2015-01-09.CS1 maint: Archived copy as title (link)
  31. ^ "Archived copy". Archived from the original on 2015-01-09. Retrieved 2015-01-09.CS1 maint: Archived copy as title (link)
  32. ^
  33. ^ "Archived copy". Archived from the original on 2015-01-09. Retrieved 2015-01-09.CS1 maint: Archived copy as title (link)

External links

680 AM

The following radio stations broadcast on AM frequency 680 kHz: 680 AM is a North American clear-channel frequency. KNBR and KBRW share Class A status on 680 kHz. WRKO, WPTF, CJOB and CFTR also broadcast on 680 kHz, with 50,000 watts at all times, but are class B.

Bob Fitzgerald

Robert James Fitzgerald (born 1966) is an American sports broadcaster who is currently the TV play-by-play announcer for the NBA's Golden State Warriors on NBC Sports Bay Area and was a co-host of the radio talk show show Fitz and Brooks on KNBR with Rod Brooks.

Bruce Hale

William Bruce Hale (August 30, 1918 – December 30, 1980) was an American professional basketball player and coach.

A 6'1" guard/forward from Medford, Oregon, Hale played college basketball at Santa Clara University, then played professionally in the early NBA as a member of the Indianapolis Jets, Fort Wayne Pistons, and Indianapolis Olympians. He averaged 9.1 points per game over his NBA career. He later held coaching positions with the University of Miami, the Oakland Oaks of the American Basketball Association, and St. Mary's College of California. Before he died of a heart attack in 1980, he had been working as a marketing director at the KNBR radio station.Hale's daughter, Pam, married basketball player Rick Barry, who played for Hale at the University of Miami.Hale was inducted into the University of Miami Sports Hall of Fame in 1986.

Christian Arroyo

Christian Israel Arroyo (born May 30, 1995) is an American professional baseball infielder for the Tampa Bay Rays of Major League Baseball (MLB). He previously played for the San Francisco Giants.

Damon Bruce

Damon Matthew Bruce (born March 25, 1975) is an American sports radio host who currently hosts The Damon Bruce Show on KGMZ-FM "95.7 the Game" in San Francisco, California. An Indiana University Bloomington graduate, Bruce began his radio career in the late 1990s as a producer with KNBR in San Francisco. He later hosted Sports Overnight America and became a reporter for the ESPN Radio and Sporting News Radio networks. After stints in Columbus, Ohio and Fort Wayne, Indiana, Bruce re-joined KNBR 680 in 2005 to host Sportsphone 680. From 2010 to 2014, Bruce hosted an afternoon talk show on KNBR's sister station KTCT "KNBR 1050" and joined CBS Sports Radio in 2013. Bruce also hosted pre-game and post-game shows for KNBR coverage of San Francisco 49ers and San Francisco Giants games. At the end of March 2014, he joined 95.7 the Game as the weekday late afternoon host.

Dave Flemming

David Braxton Flemming (born May 31, 1976) is an American sportscaster, currently working as a play-by-play announcer for the San Francisco Giants of Major League Baseball as well as college football, college basketball, and Monday Night Baseball on ESPN and NBA basketball on ESPN Radio.

Flemming grew up in Alexandria, Virginia, listening to current Giants partner Jon Miller call Baltimore Orioles games. In 2004, Flemming began his first full year as an announcer for the team, working with Miller, Duane Kuiper and Mike Krukow on San Francisco station KNBR and the Giants Radio Network. He currently splits time between the Giants' radio and television broadcasts.

Gary Radnich

Gary Kelley Radunich (born February 2, 1950), known as Gary Radnich, is a radio and television host in the San Francisco bay area. He hosts The Gary Radnich Show which runs weekday mornings on KNBR radio, and is the lead sports anchor on KRON television.

Jon Miller

Jon Wesley Miller (born October 11, 1951) is an American sportscaster, known primarily for his broadcasts of Major League Baseball. Since 1997 he has been employed as a play-by-play announcer for the San Francisco Giants. He was also a baseball announcer for ESPN from 1990 to 2010. Miller received the Ford C. Frick Award from the National Baseball Hall of Fame in 2010.


KFEQ (680 kHz) is a commercial AM radio station in St. Joseph, Missouri. It is owned by Eagle Communications and airs a news-talk-farm reports radio format. The studios and offices are on Country Lane in St. Joseph.

KFEQ broadcasts at 5,000 watts using a directional antenna. The transmitter is on Miller Road, near Interstate 29 in St. Joseph. Due to the station's low dial location and 5,000 watts of power, it can be heard in Kansas City and Topeka during the day, and provides at least secondary coverage to portions of Missouri, Kansas, Nebraska and Iowa. At night, four towers are used in a directional pattern to protect Class A clear-channel station KNBR in San Francisco. KFEQ concentrates its nighttime signal toward the St. Joseph and Kansas City areas. KFEQ is also heard on a 230 watt FM translator station, 107.9 K300DV.


KLIF-FM (93.3 FM, branded as "Hot 93.3") is a radio station licensed to serve Haltom City, Texas, United States. The station is owned by Cumulus Media, and the broadcast license is held by Radio License Holding SRC LLC. It broadcasts a CHR music format to the Dallas/Fort Worth metroplex in Texas. The station's studios are located in the Victory Park district in Dallas just north of downtown, and the transmitter site is in West Dallas near the I-30/Loop 12 interchange.

The KLIF call sign has a long history of being associated with CHR/Top 40 music. The original KLIF at 1190 on the dial was Dallas/Fort Worth's most popular Top 40 music station from the 1950s through the 1970s.

KLIF-FM is licensed by iBiquity to broadcast a digital HD Radio signal. KLIF-FM stopped transmitting its digital signals in late November 2011 and resumed in early January 2012. The digital signal ceased again sometime in the summer of 2014. Because the license to broadcast digital HD Radio is perpetual, the station could resume digital broadcasts at any time.


KOMW (680 AM, "Radio Okanogan 680") is a radio station broadcasting an Adult Standards/MOR music format. Licensed to Omak, Washington, United States, the station is currently owned by North Cascades Broadcasting, Inc. and features programming from Citadel Media. This station is a daytimer, signing on at sunrise and signing off at sunset, to protect KNBR in San Francisco, also on 680 kHz.


KSAN (107.7 FM, "107.7 The Bone") is a commercial radio station licensed to San Mateo, California, with its transmitter located on San Bruno Mountain. It is owned and operated by Cumulus Media and broadcasts to the San Francisco Bay Area. KSAN airs a classic rock music format. The station's studios are located in San Francisco's SoMa district.


KTCT (1050 AM) is a radio station licensed to San Mateo, California. The station airs a sports format as KNBR 1050, a sister radio station to KNBR.

Oakland Athletics Radio Network

The Oakland Athletics Radio Network consists of 17 stations (16 A.M., 1 F.M., plus 1 F.M. booster and 1 F.M. translator) in the state of California. The English-language broadcasts for Oakland Athletics Major League Baseball games start 50 minutes before game time on KTRB only with the network broadcast beginning 20 minutes prior to game time. Additionally, there is a 4-station Spanish-language network (all A.M.) with affiliates in italics. The Spanish-language network only airs night & weekend home games.

Ralph Barbieri

Ralph Barbieri (born c. 1946) is a former sports radio personality from San Francisco, California. Along with former NBA player Tom Tolbert, Barbieri hosted the afternoon sports radio show The Razor and Mr. T on KNBR from 1996 to 2012. With Barbieri, the show was the highest rated show in the Bay Area for the 25-54 male demographic since 2000.

San Francisco Giants Radio Network

The San Francisco Giants Radio Network is the radio network of the San Francisco Giants. There are 12 stations (seven AM, three FM, and two FM translators) in the English-language network, including the flagship KNBR/680 AM. Additionally, KXZM/93.7 FM carries the team's broadcasts in Spanish, bringing the total number of radio stations carrying Giants baseball to 13. The network is identified on-air as the KNBR Northern California Honda Dealers Radio Network.

Announcers include Jon Miller, Dave Flemming, Duane Kuiper, and Mike Krukow on the English-language broadcasts, with Erwin Higueros, Tito Fuentes, and Marvin Benard handling Spanish-language duties.

Susquehanna Radio Corporation

The Susquehanna Radio Corporation was a media corporation which operated from 1941 to 2006 that was headquartered in York, Pennsylvania. The company was a unit of Susquehanna Pfaltzgraff, a conglomerate more widely known for the Pfaltzgraff kitchenware line than its broadcasting pursuits.

Some of the early Susquehanna radio properties included top 40 music stations WSBA (910 AM) in York, WARM (590 AM) in Scranton, Pennsylvania, WICE (1290 AM, now WRPA) in Providence, Rhode Island, and WHLO (640 AM) in Akron, Ohio. WQBA (1140 AM), a Spanish-language station in Miami, Florida, was also part of the group. Susquehanna's best-known acquisition was the 1989 purchase of San Francisco's KNBR (680 AM) from NBC (the last radio station owned by the network) and its shepherding of that station into one of the nation's more well known sports talk stations.

Over time, Susquehanna repositioned itself from a company based largely in the Northeast to one based largely in the Southern and Midwestern markets (nevertheless keeping its original stations in York). The company was absorbed into Cumulus Media in 2006 when Louis Appell's children broke up Susquehanna Pfaltzgraff.

Today, the company is still active as a holding subsidiary named "Radio License Holding SRC, LLC".

Tom Tolbert

Byron Thomas Tolbert (born October 16, 1965) is an American sports broadcaster and retired professional basketball player. He played a total of seven seasons in the National Basketball Association. After retiring from basketball, Tolbert became a radio show co-host on KNBR in San Francisco and NBA commentator for the television networks NBC, ESPN, and ABC.

Tony Bruno

Tony Bruno (born June 13, 1952) is an American sports talk radio personality from Philadelphia, Pennsylvania. He is a 40-year sports radio veteran, having worked for national American sports broadcasters including ESPN Radio, Fox Sports Radio, Premiere and Sporting News Radio.

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