This list includes AM stations in the United States and Canada that broadcast with a power of 50,000 Watts day and night. Some of these stations are what was once known as the "clear channel" stations; others are not. The fourth column shows the station's antenna pattern:

Most of the original "clear channel" stations are nondirectional 24 hours. Some stations, such as WBZ, could operate as nondirectional, but instead use a directional pattern to avoid sending large amounts of signal into the ocean. The formats and call letters on this list are probably not 100% up-to-date, so send any updates to JonEllis@NorthPine.com.

 540  CBK   Regina, SK          U1   CBC Radio One
 540  WFLF  Pine Hills, FL      U4   News/Talk
 590  CJCL  Toronto, ON         U3   Sports
 630  CHED  Edmonton, AB        U4   AC/Talk
 640  KFI   Los Angeles, CA     U1   News/Talk
 640  CFYI  Richmond Hill, ON   U4   News/Talk
 650  WSM   Nashville, TN       U1   Classic Country
 650  KENI  Anchorage, AK       U1   News/Talk
 660  WFAN  New York City, NY   U1   Sports
 660  KTNN  Window Rock, AZ     U2   Navajo/Country
 660  CFFR  Calgary, AB         U4   News
 670  WSCR  Chicago, IL         U1   Sports
 670  KBOI  Boise, ID           U2   News/Talk
 680  KNBR  San Francisco, CA   U1   Sports
 680  WRKO  Boston, MA          U4   News/Talk
 680  WPTF  Raleigh, NC         U2   News/Talk
 680  CJOB  Winnipeg, MB        U4   News/Talk
 680  CFTR  Toronto, ON         U4   News
 690  CBU   Vancouver, BC       U3   CBC Radio One
 700  WLW   Cincinnati, OH      U1   News/Talk
 710  KIRO  Seattle, WA         U2   News/Talk
 710  WAQI  Miami, FL           U1   Spanish News/Talk
 710  WOR   New York City, NY   U3   News/Talk
 720  WGN   Chicago, IL         U1   News/Talk
 720  KDWN  Las Vegas, NV       U2   News/Talk
 730  CJNW  Vancouver, BC       U4   News/Talk
 730  CKAC  Montreal, PQ        U3   French News/Talk
 740  KCBS  San Francisco, CA   U4   News
 740  KTRH  Houston, TX         U4   News/Talk
 740  CBX   Edmonton, AB        U4   CBC Radio One
 740  CFZM  Toronto, ON         U1   Big Band/Soft Oldies
 740  WQTM  Orlando, FL         U4   Sports
 750  WSB   Atlanta, GA         U1   News/Talk
 750  KFQD  Anchorage, AK       U1   News/Talk
 760  WJR   Detroit, MI         U1   News/Talk
 770  WABC  New York City, NY   U1   News/Talk
 770  KKOB  Albuquerque, NM     U2   News/Talk
 770  CHQR  Calgary, AB         U2   News/Talk
 780  WBBM  Chicago, IL         U1   News
 780  KKOH  Reno, NV            U2   News/Talk
 790  CFCW  Camrose, AB         U4   Country
 790  CIGM  Sudbury, ON         U4   Country
 800  CKLW  Windsor, ON         U4   News/Talk
 800  CHRC  Quebec, PQ          U3   French News/Talk
 810  KGO   San Francisco, CA   U3   News/Talk
 810  WGY   Schenectady, NY     U1   News/Talk
 820  WBAP  Fort Worth, TX      U1   News/Talk
 820  KCBF  Fairbanks, AK       U1   Classic Country
 830  WCCO  Minneapolis, MN     U1   News/Talk
 840  WHAS  Louisville, KY      U1   News/Talk
 850  KOA   Denver, CO          U1   News/Talk
 850  WEEI  Boston, MA          U4   Sports
 860  CJBC  Toronto, ON         U1   La Première Chaîne
 870  WWL   New Orleans, LA     U3   News/Talk
 880  WCBS  New York City, NY   U1   News
 880  KRVN  Lexington, NE       U2   News/Farm/Country
 880  CHQT  Edmonton, AB        U2   Easy Listening
 890  WLS   Chicago, IL         U1   News/Talk
 900  CHML  Hamilton, ON        U4   Talk/Oldies
 910  CKDQ  Drumheller, AB      U4   Country
 930  CJCA  Edmonton, AB        U2   Christian
 930  CFBC  St. John, NB        U4   Oldies
 930  CJYQ  St. John's, NF      U2   Oldies
 940  KWRU  Fresno, CA          U4   Spanish
 950  KJR   Seattle, WA         U2   Sports
 950  WWJ   Detroit, MI         U4   News
 960  CFAC  Calgary, AB         U2   Sports
 980  CKNW  Vancouver, BC       U3   News/Talk/AC
 990  CBW*  Winnipeg, MB        U1   CBC Radio One
 990  CKGM  Montreal, PQ        U4   Oldies
1000  WMVP  Chicago, IL         U2   Sports
1000  KOMO  Seattle, WA         U2   News/Talk
1010  WINS  New York City, NY   U3   News
1010  CBR   Calgary, AB         U4   CBC Radio One
1010  CFRB  Toronto, ON         U4   News/Talk
1020  KDKA  Pittsburgh, PA      U1   News/Talk
1020  KTNQ  Los Angeles, CA     U4   Spanish AC
1020  KINF  Roswell, NM         U4   News/Oldies
1030  WBZ   Boston, MA          U3   News/Talk
1030  KTWO  Casper, WY          U2   News/Talk
1040  WHO   Des Moines, IA      U1   News/Talk
1050  WEPN  New York City, NY   U3   Sports
1050  CHUM  Toronto, ON         U4   Oldies, Talk
1060  KYW   Philadelphia, PA    U3   News
1060  CKMX  Calgary, AB         U2   AC
1070  KNX   Los Angeles, CA     U1   News
1070  CBA   Moncton, NB         U1   CBC Radio One
1080  WTIC  Hartford, CT        U2   AC/Talk
1080  KRLD  Dallas, TX          U2   News/Talk
1090  KAAY  Little Rock, AR     U2   Christian Talk
1090  KPTK  Seattle, WA         U4   News/Talk
1090  WBAL  Baltimore, MD       U2   News/Talk
1100  WTAM  Cleveland, OH       U1   News/Talk
1100  KFAX  San Francisco, CA   U3   Christian/Ethnic
1110  KFAB  Omaha, NE           U2   News/Talk
1110  WBT   Charlotte, NC       U2   News/Talk
1120  KMOX  St. Louis, MO       U1   News/Talk
1120  KPNW  Eugene, OR          U3   News/Talk
1130  KWKH  Shreveport, LA      U2   Classic Country
1130  WBBR  New York City, NY   U2   Business News
1130  CKWX  Vancouver, BC       U4   News
1140  KHTK  Sacremento, CA      U4   Sports
1140  WRVA  Richmond, VA        U3   News/Talk
1140  CFXL  Calgary, AB         U4   AC
1150  CKOC  Hamilton, ON        U4   Oldies
1160  KSL   Salt Lake City, UT  U1   News/Talk/Sports
1160  WYLL  Chicago, IL         U4   Christian
1170  KFAQ  Tulsa, OK           U2   News/Talk
1170  WWVA  Wheeling, WV        U2   News/Talk
1180  WHAM  Rochester, NY       U1   News/Talk
1180  VOA   Marathon, FL        U3   Radio Marti
1190  KEX   Portland, OR        U2   News/Talk
1200  WOAI  San Antonio, TX     U1   News/Talk
1200  CKDA  Victoria, BC        U4   `70s Oldies
1200  CFGO  Ottawa, ON          U4   Sports
1210  WPHT  Philadelphia, PA    U1   News/Talk
1220  WHK   Cleveland, OH       U3   Christian Talk
1260  CFRN  Edmonton, AB        U2   Nostalgia
1270  WXYT  Detroit, MI         U4   Sports
1280  CFMB  Montreal, PQ        U4   Ethnic
1310  CIWW  Ottawa, ON          U4   Oldies
1320  CHMB  Vancouver, BC       U4   Ethnic
1410  CFUN  Vancouver, BC       U4   AC/Oldies
1430  CKYC  Toronto, ON         U4   Country
1470  CJVB  Vancouver, BC       U4   Ethnic/AC
1500  WTOP  Washington, DC      U4   News
1500  KSTP  St. Paul, MN        U2   News/Talk
1510  WWZN  Boston, MA          U4   Sports
1510  WLAC  Nashville, TN       U2   News/Talk
1510  KGA   Spokane, WA         U2   News/Talk
1520  WWKB  Buffalo, NY         U3   News/Talk
1520  KOKC  Oklahoma City, OK   U2   News/Talk
1530  KFBK  Sacremento, CA      U4   News/Talk
1530  WCKY  Cincinnati, OH      U2   Sports
1540  KXEL  Waterloo, IA        U2   News/Talk/Christian
1540  WDCD  Albany, NY          U3   Christian
1560  WQEW  New York City, NY   U4   Radio Disney
1580  KMIK  Tempe, AZ           U2   Radio Disney
1580  KBLA  Santa Monica, CA    U4   Spanish Christian

*CBW drops to 46kW at night.  Close enough!