Zip Code Signal
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Find the field strengths of AM day, AM Night and FM stations within U.S. postal zip codes throughout the U.S.  This web program produces accurate radio station signal field strengths, organized by zip codes, from the FCC's CDBS AM and FM database, as of July 8, 2014. V-Soft Communications provides this data free of charge as a service to its customers and friends.  

This program's database now contains Canadian and Mexican stations that are heard in U.S. zip codes.   U.S. translators are also in our database. All US territories are included, such as Puerto Rico, Virgin islands, Guam and American Samoa.

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DATA, AS PRESENTED, ARE DISTRIBUTED AND PROVIDED "AS IS" AND WITH NO
WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED. USE AT YOUR OWN RISK.

 

Enter a US zip code to find the signal strength of AM and FM stations serving the location.

 AM Night stations have the "-N" appended to their call signs.

100+ dBu  Extremely strong

80+ dBu   Very Strong

70+ dBu  Strong Principal city coverage

60+ dBu  Good coverage

50+ dBu  Weaker Coverage - may have interference

* Coverage predictions use the standard FCC method, directional antenna patterns if used by the stations and for FM stations the 30 arc-second World Global terrain elevation database.  AM daytime station coverage and nighttime coverage is predicted using the M3 ground conductivities curves. 50 dBu is the cutoff for prediction for this signal strength retrieving program.  Many stations may have coverage past the 50 dBu. The majority of FM stations are protected from interference by the FCC only to their 60 dBu.  For FM stations, any coverage past the 60 dBu signal strength value would depend on whether there are other stations causing interference, which cannot be reliably predicted using the standard methods employed herein. Many AM stations operating at night are subject to interference which is not considered by this program.

 

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